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1
Klein, Frank, Tony Lupo, Don Pielack, Mark Mozola, David Pinero, Scott Coates, Nancy Thiex, Christoph von Holst et Jim Drouillard. « Validation Study of a Lateral-Flow Immunoassay for Detection of Ruminant By-Product Material in Animal Feeds and Feed Ingredients : Performance-Tested MethodSM 010405 ». Journal of AOAC INTERNATIONAL 88, no 6 (1 septembre 2005) : 1583–92. http://dx.doi.org/10.1093/jaoac/88.6.1583.
Texte intégralRésumé :
Abstract An immunoassay with a lateral flow format has been developed for the detection of ruminant by-product material in animal feeds and feed ingredients. The test is designed for the analysis of animal feeds destined for feeding to ruminants to ensure that they do not contain ruminant by-products in violation of the ruminant-to-ruminant feed ban established by the U.S. Food and Drug Administration in 1997. This feed ban was established as a firewall against exposure of ruminant livestock animals to the prion agents responsible for neurological diseases such as bovine spongiform encephalopathy and scrapie. The test is designed for field use, e.g., at a feed mill, and yields a qualitative (presence/absence) result in 15–20 min. The objective of the study was to validate the lateral-flow test for detection of ruminant by-product material in a variety of finished animal feeds and feed ingredients. Results indicate that the test is specific for ruminant material and can detect as little as 1% ruminant material in these commodities.
2
ZOIOPOULOS (Π. ΖΩΙΟΠΟΥΛΟΣ), P. « Feed Ban and BSE : the detection and identification of processed animal proteins in compound feeds ». Journal of the Hellenic Veterinary Medical Society 62, no 1 (10 novembre 2017) : 71. http://dx.doi.org/10.12681/jhvms.14838.
Texte intégralRésumé :
Reference is made initially to the incidence of BSE within the EU territory and the reasons of the appearance of the disease i.e. the use of meat and bone meal in ruminant diets. In turn, the evolution of Community legislation in the sector of marketing of feeds of animal origin is described. Furthermore, the banning of feeding of mammalian protein to ruminants and the extension of prohibition to further animal proteins such as from other vertebrates and how this banning affects the feeding of the various animal species is reviewed. Finally, the importance of detecting and identifying the presence and amount of processed animal proteins in compound feed as well as feed materials is stressed and methods such as feed microscopy, immunoassay techniques, PCR, NIR and HPLC are discussed.
3
Mir, P. S., T. A. McAllister, D. J. Gibb et E. K. Okine. « Dietary oil rich in polyunsaturated fatty acids for ruminants : Post-ruminal digesta characteristics and their implications on production ». Canadian Journal of Animal Science 86, no 2 (1 juin 2006) : 159–70. http://dx.doi.org/10.4141/a05-056.
Texte intégralRésumé :
Maximizing the production of ruminants requires high intakes of feeds that are energy dense, therefore feeds that are usually high in starch. Under these conditions there can be significant passage of partially digested feed starch and fibre to the small intestine. These digesta components interact in a manner that can diminish post-ruminal digestion and absorption. However, in ruminants, the effects of digesta composition on causing physical constraints to digestion and absorption, via increased digesta viscosity have not been given adequate consideration. While elevation of digesta viscosity as a means of reducing rate of nutrient absorption and re-absorption of compounds detrimental to health is a valid approach in humans, digesta viscosity may reduce the production potential of livestock. Thus, there is merit in reviewing the feeding strategies that lead to increased viscosity and how its mitigation can be managed through inclusion of oil in ruminant diets. The interactions between digesta composition and the resultant viscosity with digestive physiology and production factors are examined. This review also highlights the associated benefits of dietary oil for ruminants, such as enhancement of bio-active lipids in ruminant products, health benefits directly to the animal, through decreasing incidence of liver abscesses and effects on production and possibly on the environment (reduction of enteropathogenic bacterial shedding and methane emissions). Key words: Ruminant, starch, digesta characteristics, viscosity, cholecystokinin
4
Colombatto, D., D. P. Morgavi et F. L. Mould. « Feed enzymes for ruminants. The need for a rational screening system ». Proceedings of the British Society of Animal Science 2002 (2002) : 249–50. http://dx.doi.org/10.1017/s1752756200009005.
Texte intégralRésumé :
Enzymes that degrade the plant cell wall, collectively termed cellulases and hemicellulases, have attracted considerable research efforts recently, because of their potential to be used as additives for animal feeds. Widely used in monogastric animals, mainly to remove antinutritional factors (Bedford, 2000), enzymes are increasingly used in ruminant diets to enhance feedstuff degradability, following results from feeding trials where positive responses in rumen digestion and animal production were observed (Beaucheminet al., 1995; Fenget al., 1996; Yanget al., 1999). Enzymes could also provide an environmentally friendly alternative to the use of antibiotics as feed additives for ruminants.
5
ZOIOPOULOS (Π. ΖΩΪΟΠΟΥΛΟΣ), P. « The applications of biotechnology in animal feeding : A critical overview ». Journal of the Hellenic Veterinary Medical Society 55, no 2 (6 décembre 2017) : 156. http://dx.doi.org/10.12681/jhvms.15186.
Texte intégralRésumé :
An effort is made in this article to present the applications of biotechnology as regards the improvement of nutritive value and the development of novel feeds as well as the production of various types of feed additives. With respect to raw materials, quality upgrading by bio technological means has been attempted through lignocellulose breakdown or protein enrichment. In addition, reference is made to bioproteins and feeds derived from transgenic plants, particularly those resistant to herbicides. In turn, reference is made to aminoacids as products of industrial fermentation. Furthermore, various feed additives, products of biotechnology, such as enzymes, antibiotics, probiotics, but also means for depression of methanogenesis in the forestomachs of ruminants, as well as silage agents, like inoculants and enzymes, are commented upon. In certain cases, reference is made to the issue of efficacy of biotechnology products when used in animal nutrition and the subject of feed safety. Finally, because of the need for licensing these products in order to be circulated, reference is made to the provisions of Community legislation governing the marketing of feeds. The article concludes with some thoughts on the future of the sector of application of biotechnology in the case of animal nutrition.
6
Owens, Fredric N. « 356 Anomalies of Carbohydrate Digestion and Metabolism by Ruminants ». Journal of Animal Science 99, Supplement_3 (8 octobre 2021) : 196. http://dx.doi.org/10.1093/jas/skab235.355.
Texte intégralRésumé :
Abstract Carbohydrate, derived either from plant cell walls (neutral detergent fiber; NDF) from fresh or conserved forages consumed by cows and growing cattle or from starch of grains and concentrates in commercial feedlot diets, provides most of the dietary energy for ruminant growth and production. The ruminants’ ability to harvest forage from remote, inaccessible locations, to scavenge energy from NDF of feeds and byproducts of grain largely indigestible by non-ruminants, and to employ non-protein N to form protein-rich, nutrient-dense foods for humans are key ecological advantages over non-ruminants. Outlined below are some topics needing research attention. First, feed composition tables invariably indicate that the digested energy (DE) of carbohydrates is 4.4 kilocalories per gram, yet the gross energy (GE) of purified carbohydrate polymers (starch; cellulose, glycogen) averages 4.18; monomers (hexoses, pentoses) average 3.74. Having DE exceed GE violates the first Law of Thermodynamics! Might this 5 percent discrepancy reflect underestimations of fecal lignin or of protein digestibility due to metabolic fecal N? Favoring feeds rich in carbohydrate, this discrepancy confounds formulation of least-cost diets. Secondly, site of digestion of carbohydrate alters its metabolizable energy (ME). Fermentation, though required to yield ME from NDF, generates methane and heat. In contrast, starches and sugars that escape ruminal fermentation, if digested in the small intestine, circumvent these losses increasing their relative ME. Unfortunately, when ruminally fermented, starch, either directly or via pH depression, reduces NDF fermentation; might ruminal NDF digestion be increased by feeding NDF plus buffer versus concentrate diet components asynchronously? Third, carbohydrate metabolites lost in urine (lactate, pentoses, hippuric acid) need further quantification. Finally, ruminally-formed metabolites (methylglyoxal, methane) adversely affect animal health and energetics. Ruminal modification (site- or time-targeted enzymes or inhibitors; altering the ruminal microbiome with pre- or probiotics, inoculants, nutraceuticals) should help enhance ruminant productivity and sustainability.
7
Pent, Gabe J. « 192 Towards Year-Round Grazing in the Southeastern U.S ». Journal of Animal Science 98, Supplement_2 (1 novembre 2020) : 67. http://dx.doi.org/10.1093/jas/skz397.153.
Texte intégralRésumé :
Abstract Winter feeds costs for small ruminants exceeds 50% of the total cost of most small ruminant production systems in the Southeastern U.S. Keeping these feed costs low is one of the most effective and time-tested ways to improve farm profitability. While maintaining an appropriate stocking rate will be critical for sustaining long-term farm productivity, a suite of other management practices is available to assist in this objective. Installing appropriate fence and watering system infrastructure for managing grazing will be critical for improving harvest efficiency and stockpiling forages for utilization when forage growth is limited. Filling gaps in forage production may also be achieved through the strategic use of a number of forage species, including warm-season or cool-season forages and annual or perennial forages. Managing stored forages appropriately during storing and feeding will help minimize feed losses, while producing quality hay will reduce the need for supplementary feeds. With the adoption of these proven practices, sheep and goat production may be optimized by allowing them to harvest their own feed almost year-round in the Southeastern U.S.
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Mavromati, J., Z. Gjeta, E. Mavromati, V. Kolaneci et A. Molla. « Production systems and economics of sheep husbandry in southern Albania ». Biotehnologija u stocarstvu 27, no 3 (2011) : 1167–76. http://dx.doi.org/10.2298/bah1103167m.
Texte intégralRésumé :
Small ruminants in Albania seem to have a great importance within the livestock sector. The small ruminants' populations count almost 2.7 million heads, out of which 1.8 million are sheep. The estimated value of the commercialized small livestock population is about 35 million Euros. The total value of the small ruminant population is estimated at 140 million Euros. More than 1.5 million heads of small ruminants are consumed each year in the local market. Import of small ruminant?s meat was at a level of 599 ton/year (2010 data). This study aimed the assessment of the production systems and economics of sheep husbandry in the southern regions of Albania. The different husbandry systems employed (transhumant, non transhumant, semi-intensive) showed only slight differences in terms of outputs, but not the expected differences regarding inputs (feeds) and corresponding costs (semi-intensive system). The economic assessment demonstrates very useful and interesting results. Overall Gross Margin per ewe and lambs at weaning was in the area of 6,369.00 ALL (1 Euro=136 Albanian Lek, ALL), the range of GM was enormous between different farms (3,042.6 ALL - 11,322.4 ALL), mainly caused by the large differences in feeding and labor costs per ewe.
9
Radchikov, V. F., V. P. Tsai, V. K. Gurin et V. A. Lyundishev. « ORGANIC TRACE ELEMENT COMPLEX FOR CALVES FEEDING ». Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 18, no 3(71) (13 octobre 2016) : 225–27. http://dx.doi.org/10.15421/nvlvet7152.
Texte intégralRésumé :
Trace elements are commonly used in the form of inorganic salts poorly digested by ruminants due rumen microflora, which transits its greater part into indigestible and insoluble form. Trace elements in the form of chelates are supplied with amino acids and peptides, and used by the body much more efficiently. Inclusion of organic trace element complex (OMEK) in compound feed KR–1 in the amount of 10% of the existing standards for trace elements content in typical formulations for growing young cattle for meat has a positive impact on palatability of feeds, morphological and biochemical composition of blood and animals’ performance, economic efficiency of calves fattening. Use of organic trace element complex in compound feeds KR–1 increases concentration of total protein in blood by 8 – 12% (P < 0.05), reduces the amount of urea by 11 – 16% (P < 0.05). Comparative analysis showed that animals in experimental group II used the feeds more efficiently. Metabolizable energy consumption per 1 kg of weight gain made 33.7 MJ against 37.4 MJ in the control group or by 9.9% lower, the same trend is established for digestible protein cost – by 10%. Inclusion of OMEK in compound feed KR–1 for young cattle ensures average daily weight gain increase by 12.3% (P < 0.05), decreased of feed cost per 1 kg of weight gain by 10%. Use of organic trace element complex helps to decrease the cost price of weight gain, by 9.0% and obtain extra profit of $37.2 USD per one animal during the experimental period.
10
Deaville, E. R. « The role of biotechnology in enhancing the digestion of forage cell walls by ruminants (jerry hughes scholarship) ». Proceedings of the British Society of Animal Science 1995 (mars 1995) : 73. http://dx.doi.org/10.1017/s1752756200590693.
Texte intégralRésumé :
The term biotechnology has been defined as the application of biological organisms, systems or processes to manufacture and service industries (Anon, 1980) and is, therefore, more than the application of ‘genetic engineering’ techniques alone. The potential application of biotechnology to the agricultural livestock industry includes many wide ranging areas: animal health; breeding; livestock production; livestock nutrition and the nutritive value of feeds. The role of biotechnology in animal nutrition and feeding is of particular importance since feed costs account for a significant proportion of the total variable costs in any livestock production system (e.g. milk, meat). The potential implications of biotechnology in animal nutrition has been reviewed by Armstrong (1986) and includes references to the improvement of the nutritive value of feeds through, for example, genetic manipulation of feed sources (cereals), appropriate supplementation and the use of biological inoculants with or without enzymes as silage additives and to improvements in the ability of the animal to obtain nutrients from feeds through the addition of enzymes to feeds and modification of rumen microbes through genetic engineering.
11
Deaville, E. R. « The role of biotechnology in enhancing the digestion of forage cell walls by ruminants (jerry hughes scholarship) ». Proceedings of the British Society of Animal Science 1995 (mars 1995) : 73. http://dx.doi.org/10.1017/s0308229600028403.
Texte intégralRésumé :
The term biotechnology has been defined as the application of biological organisms, systems or processes to manufacture and service industries (Anon, 1980) and is, therefore, more than the application of ‘genetic engineering’ techniques alone. The potential application of biotechnology to the agricultural livestock industry includes many wide ranging areas: animal health; breeding; livestock production; livestock nutrition and the nutritive value of feeds. The role of biotechnology in animal nutrition and feeding is of particular importance since feed costs account for a significant proportion of the total variable costs in any livestock production system (e.g. milk, meat). The potential implications of biotechnology in animal nutrition has been reviewed by Armstrong (1986) and includes references to the improvement of the nutritive value of feeds through, for example, genetic manipulation of feed sources (cereals), appropriate supplementation and the use of biological inoculants with or without enzymes as silage additives and to improvements in the ability of the animal to obtain nutrients from feeds through the addition of enzymes to feeds and modification of rumen microbes through genetic engineering.
12
Sun, Xuezhao, David Pacheco, Grant Taylor, Peter H. Janssen et Natasha M. Swainson. « Evaluation of Feed Near-Infrared Reflectance Spectra as Predictors of Methane Emissions from Ruminants ». Animals 12, no 18 (19 septembre 2022) : 2478. http://dx.doi.org/10.3390/ani12182478.
Texte intégralRésumé :
Feed chemical composition is associated with methane (CH4) formation in the rumen, and thus CH4 yields (Ym; CH4 emitted from per unit of dry matter intake) could be predicted using near-infrared reflectance spectroscopy (NIRS) of feeds fed to ruminants. Two databases of NIRS data were compiled from feeds used in experiments in which CH4 yields had been quantified in respiration chambers. Each record in the databases represented a batch of feed offered to a group of experimental animals and the mean CH4 yield for the group. A near-infrared reflectance spectrum was obtained from each feed, and these spectra were used to generate a predictive equation for Ym. The predictive model generated from brassica crops and pasture fed at a similar feeding level (n = 40 records) explained 53% of the variation in Ym and had a reasonably good agreement (concordance correlation coefficient of 0.77). The predictive ability of the NIRS calibration could be useful for screening purposes, particularly for predicting the potential Ym of multiple feeds or feed samples, rather than measuring Ym in animal experiments at high expenses. It is recommended that the databases for NIRS calibrations are expanded by collecting feed information from future experiments in which methane emissions are measured, using alternative algorithms and combining other techniques, such as terahertz time-domain spectroscopy.
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RADCHIKOV, V. F., D. M. BOGDANOVICH, G. V. BESARAB, T. L. SAPSALEVA, M. V. JUMKOVA, S. N. PILYUK, A. K. NATYROV et al. « EFFICIENCY OF CARBAMIDE USE IN FEEDING YOUNG CATTLE ». Zootechnical science of Belarus 57, no 2 (25 septembre 2022) : 20–28. http://dx.doi.org/10.47612/0134-9732-2022-57-2-20-28.
Texte intégralRésumé :
Complete feeding makes it possible to fully use the genetic potential of animals, increase productivity and reduce feed consumption. In order to balance diets in terms of protein, it is advisable to use synthetic nitrogenous substances in feeding ruminants, since this allows releasing a significant amount of high-protein plant feeds (oilcake, meal) in diets. The article contains the results of studying the effect of feeding nitrogenous
substances of non-protein nature on the productivity of young cattle. It was found that the use of 10-, 20- and 25% carbamide concentrate in animal diets increased the degradability of protein in compound feed, blood erythrocyte level by 6.18-7.77%,
hemoglobin concentration by 4.8-6.2%, leukocyte content by 10.3-13.3%, platelets by 4.1-21.5%, which contributed to an increase in the average daily gain by 6.8-11.9%.
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Bueno, Ives C. S., Roberta A. Brandi, Gisele M. Fagundes, Gabriela Benetel et James Pierre Muir. « The Role of Condensed Tannins in the In Vitro Rumen Fermentation Kinetics in Ruminant Species : Feeding Type Involved ? » Animals 10, no 4 (7 avril 2020) : 635. http://dx.doi.org/10.3390/ani10040635.
Texte intégralRésumé :
Animal feeding behavior and diet composition determine rumen fermentation responses and its microbial characteristics. This study aimed to evaluate the rumen fermentation kinetics of domestic ruminants feeding diets with or without condensed tannins (CT). Holstein dairy cows, Nelore beef cattle, Mediterranean water buffalo, Santa Inês sheep and Saanen goats were used as inoculum donors (three animals of each species). The substrates were maize silage (Zea mays), fresh elephant grass (Pennisetum purpureum), Tifton-85 hay (Cynodon spp.) and fresh alfalfa (Medicago sativa). Acacia (Acacia molissima) extract was used as the external CT source. The in vitro semi-automated gas production technique was used to assess the fermentation kinetics. The experimental design was completely randomized with five inoculum sources (animal species), four substrates (feeds) and two treatments (with or without extract). The inclusion of CT caused more severe effects in grazing ruminants than selector ruminants.
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Phipps, R. H., J. D. Sutton et M. K. Bhat. « Are enzymes useful in ruminant diets ? » Proceedings of the British Society of Animal Science 2002 (2002) : 247–48. http://dx.doi.org/10.1017/s1752756200008991.
Texte intégralRésumé :
Cellulose and hemicellulose are the major structural carbohydrates present in forages and form between 30 and 60% of the forage component of ruminant diets. The complex network of structural carbohydrates and lignin generally leads to low digestibility and limits the efficient utilisation of forages by ruminants. This situation occurs in both developed and developing countries, and in the latter it is particularly pronounced as much of the forage component is based around the use of crop residues (Owen and Jayasuria, 1989). Because forage costs are significantly lower than those of other dietary ingredients, improving forage quality has been a major objective for many research programmes in both the developed and developing world. Improvements in forage quality have been sort through a number of different strategies. These have included conventional breeding techniques, which have included the integration of mutant genes, leading to the development of Brown Midrib varieties of maize and the use of chemical and biological additives. Enzyme supplements are commonly used to improve the nutritive value of feeds for non ruminants and as silage additives where they have been shown to improve silage fermentation, feed intake and performance. Recent work with ruminants has however focused on the use of enzyme supplements to improve feed efficiency by the use of “direct-fed” fibrolytic enzymes. This strategy involves the application of enzymes to feed at or only hours before feeding. These studies have yielded very variable production responses. For any new technology to be implemented widely, the responses achieved must provide an acceptable level of consistency and predictability. The current paper reviews developments in enzymology, production responses achieved and the effects on nutrient digestion.
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Hartinger, Thomas, et Qendrim Zebeli. « The Present Role and New Potentials of Anaerobic Fungi in Ruminant Nutrition ». Journal of Fungi 7, no 3 (10 mars 2021) : 200. http://dx.doi.org/10.3390/jof7030200.
Texte intégralRésumé :
The ruminal microbiota allows ruminants to utilize fibrous feeds and is in the limelight of ruminant nutrition research for many years. However, the overwhelming majority of investigations have focused on bacteria, whereas anaerobic fungi (AF) have been widely neglected by ruminant nutritionists. Anaerobic fungi are not only crucial fiber degraders but also important nutrient sources for the host. This review summarizes the current findings on AF and, most importantly, discusses their new application potentials in modern ruminant nutrition. Available data suggest AF can be applied as direct-fed microbials to enhance ruminal fiber degradation, which is indeed of interest for high-yielding dairy cows that often show depressed ruminal fibrolysis in response to high-grain feeding. Moreover, these microorganisms have relevance for the nutrient supply and reduction of methane emissions. However, to reach AF-related improvements in ruminal fiber breakdown and animal performance, obstacles in large-scale AF cultivation and applicable administration options need to be overcome. At feedstuff level, silage production may benefit from the application of fungal enzymes that cleave lignocellulosic structures and consequently enable higher energy exploitation from forages in the rumen. Concluding, AF hold several potentials in improving ruminant feeding and future research efforts are called for to harness these potentials.
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Bueno, Antonio Vinicius Iank, Gustavo Lazzari, Clóves Cabreira Jobim et João Luiz Pratti Daniel. « Ensiling Total Mixed Ration for Ruminants : A Review ». Agronomy 10, no 6 (19 juin 2020) : 879. http://dx.doi.org/10.3390/agronomy10060879.
Texte intégralRésumé :
The interest of ensiling total mixed rations (TMR) for ruminants reemerged in the last decades. In many situations, ensiling TMR has been a sustainable alternative to efficiently handle wet byproducts in ruminant diets. An ensiled TMR typically has a markedly higher aerobic stability than its respective fresh TMR. Ensiling a TMR increases ruminal protein degradability due to proteolysis during storage. An increase of feed efficiency by ruminants fed ensiled rations have been reported, due to the improved starch digestibility in TMR silages containing cereal grains. This manuscript brings an overview of the main nutrient transformations during the ensiling of TMR and their feeding value for ruminants.
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Baran, Murat Sedat, Selçuk Altaçli, Oktay Kaplan et Suphi Deniz. « The Determination of Nutrient Value, Digestibility and Energy Levels of Compound Feeds Used for Ruminant Nutrition by in Vitro Methods ». Turkish Journal of Agriculture - Food Science and Technology 5, no 7 (23 juillet 2017) : 832. http://dx.doi.org/10.24925/turjaf.v5i7.832-835.1226.
Texte intégralRésumé :
There are small number of tables that show digestibility and energy contents of compound feeds produced by feed factory in different regions of Turkey. Thus, in this paper, four different compound feed types (dairy cattle, beef cattle, calf and lamb growing feeds), totalling 78 compound feeds were analysed to determine their feeding value, dry matter (DM), organic matter (OM) digestibility and energy content (digestible energy (DE), metabolisable energy (ME) and net energy for lactation (NEL). As a result of this study, the crude fiber (CF) levels were higher than standard values in calf and lamb compound feeds and beef cattle compound feeds; however, in the dairy cattle and calf and lamb compound feeds, the crude protein (CP) values were lower than standard values. These findings are considered highly important for the region’s animal feeding. According to our results, the compound feeds for dairy cattle and lamb being used for ruminant nutrition in Diyarbakir Province of Turkey were found to have low nutrient qualities; however, in the calf feed both the metabolisable energy level and nutrient quantities were low.
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Brzozowska, A. M., K. Słoniewski, J. Oprządek, P. Sobiech et Z. M. Kowalski. « Why are dairy cows not able to cope with the subacute ruminal acidosis ? » Polish Journal of Veterinary Sciences 16, no 4 (1 décembre 2013) : 813–21. http://dx.doi.org/10.2478/pjvs-2013-0116.
Texte intégralRésumé :
Abstract One of the largest challenges for the dairy industry is to provide cows with a diet which is highly energetic but does not negatively affect their rumens’ functions. In highly productive dairy cows, feeding diets rich in readily fermentable carbohydrates provides energy precursors needed for maximum milk production, but simultaneously decreases ruminal pH, leading to a widespread prevalence of subacute ruminal acidosis. Maximizing milk production without triggering rumen acidosis still challenges dairy farmers, who try to prevent prolonged bouts of low ruminal pH mainly by proper nutrition and management practices. The animals try to avoid overeating fermentable feeds, as it causes negative consequences by disturbing digestive processes. The results of several experiments show that ruminants, including sheep and beef cattle, are able to modify some aspects of feeding behaviour in order to adjust nutrient intake to their needs and simultaneously prevent physiological disturbances. Particularly, such changes (e.g., increased preference for fibrous feeds, reduced intake of concentrates) were observed in animals, which were trying to prevent the excessive drop of rumen fluid pH. Thanks to a specific mechanism called “the postingestive feedback”, animals should be able to work out such a balance in intake, so they do not suffer either from hunger or from negative effects of over-ingesting the fermentable carbohydrates. This way, an acidosis should not be a frequent problem in ruminants. However, prolonged periods of excessively decreased rumen pH are still a concern in dairy cows. It raises a question, why the regulation of feed intake by postingestive feedback does not help to maintain stable rumen environment in dairy cows?
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Allen, Michael S. « Drives and limits to feed intake in ruminants ». Animal Production Science 54, no 10 (2014) : 1513. http://dx.doi.org/10.1071/an14478.
Texte intégralRésumé :
The control of energy intake is complex, including mechanisms that act independently (e.g. distention, osmotic effects, fuel-sensing) as well as interacting factors that are likely to affect feeding via their effects on hepatic oxidation. Effects of ruminant diets on feed intake vary greatly because of variation in their filling effects, as well as the type and temporal absorption of fuels. Effects of nutrients on endocrine response and gene expression affect energy partitioning, which in turn affects feeding behaviour by altering clearance of fuels from the blood. Dominant mechanisms controlling feed intake change with physiological state, which is highly variable among ruminants, especially through the lactation cycle. Ruminal distention might dominate control of feed intake when ruminants consume low-energy diets or when energy requirements are high, but fuel-sensing by tissues is likely to dominate control of feed intake when fuel supply is in excess of that required. The liver is likely to be a primary sensor of energy status because it is supplied by fuels from the portal drained viscera as well as the general circulation, it metabolises a variety of fuels derived from both the diet and tissues, and a signal related to hepatic oxidation of fuels is conveyed to feeding centres in the brain by hepatic vagal afferents stimulating or inhibiting feeding, depending on its energy status. The effects of somatotropin on export of fuels by milk secretion, effects of insulin on gluconeogenesis, and both on mobilisation and repletion of tissues, determine fuel availability and feed intake over the lactation cycle. Control of feed intake by hepatic energy status, affected by oxidation of fuels, is an appealing conceptual model because it integrates effects of various fuels and physiological states on feeding behaviour.
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Valizadeh, R. « Study on chemical treatment of wheat straw with Norea alkali ». Proceedings of the British Society of Animal Science 2003 (2003) : 168. http://dx.doi.org/10.1017/s1752756200013272.
Texte intégralRésumé :
Feed shortage is the greatest obstacle to Iranian livestock industry. Historically, crop residues mainly cereal straw has been very important feed resources for ruminants during late summer and cold seasons in Iran. The digestibility and voluntary feed intake of these fibrous residues are quite low. The feeding value of fibrous co-products can be upgraded by chemical treatment (Galletti, 1991). Norea as a cheap locally produced alkali containing mainly lime and sulphur with higher solubility. Although the alkali is used for removing superfluous hair in human hygiene but it might also be effective for cell wall degradation in fibrous feeds. There was no any information on utilization of this alkali. Therefore, the reason for undertaking this experiment was to test this suggestion.
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Valdivié, Manuel, et Yordan Martínez. « Hibiscus rosa-sinensis Forage as a Potential Feed for Animals : A Review ». Animals 12, no 3 (25 janvier 2022) : 288. http://dx.doi.org/10.3390/ani12030288.
Texte intégralRésumé :
This review summarized for the first time the nutritional benefits of Hibiscus rosa-sinensis in animal feed. the agronomic characteristics for the hyperproduction of Hibiscus rosa-sinensis were reported, as well as the chemical composition of the forage meal (leaves + petioles + stems), with emphasis on crude protein, amino acids, minerals, neutral detergent fiber, acid detergent fiber, lignin detergent acid, secondary metabolites, and metabolizable energy for ruminants and non-ruminants. Additionally, their medicinal properties such as antimicrobial, antifungal, antiparasitic, antioxidant, anti-inflammatory, antidiarrheal, and antipyretic properties were detailed. Its use as a source of protein in ruminant feeding is attractive and can be combined with grasses. In rabbits, fresh forage in high concentrations in the diets reduces the feed palatability, which causes a decrease in animal response, although it depends on the forage quality. In addition, limits for Hibiscus rosa-sinensis forage were recommended in diets or feeding systems for poultry, pigs, rabbits, goats, and sheep.
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Ifabiyi, John O., G. Opeyemi et Ibrahim K. Banjoko. « Status of Climate Smart Small Ruminant Production Practices in Kwara State, Nigeria ». Diyala Agricultural Sciences Journal 14, no 2 (30 décembre 2022) : 87–99. http://dx.doi.org/10.52951/dasj.22140209.
Texte intégralRésumé :
This study examined the status of climate smart small ruminant production practices in Kwara State, Nigeria. About 105 small ruminant breeders were selected for the study. The data were analysed the use of frequency count, percentage, mean score, Binary Logistic Regression and Pearson product moment correlation. The result revealed that about 60% of the breeders were females and the mean years of experience in small ruminant production was 7 years. The result of most of the frequently used climate smart small ruminant production practices of the respondents showed that provision of medication to sick animals and cultivation of crops along with rearing of animals (90.5%), feeding with supplementary feeds, isolation of sick animals and vaccination of animals (92.4%); provision of shade through Planting of trees to reduce heat stress (93.3%); feeding with crop residues and building and maintenance of pens (96.2%) and grazing on pasture/grassland (97.1%). About 90.5% of the breeders have high status on the use of climate smart small ruminant production practices. Disease outbreak and high mortality (mean=2.07) was the highest ranked factors affecting the small ruminant breeders. The result of Binary Logistic Regression showed that educational level (B=3.985), membership of social group (B=6.083), access to extension services (B= 13.941) and years of experience (B= -0.544) were the determinant factors of the use of climate smart small ruminants production practices. This study therefore recommends that breeders should be provided with veterinary services and extension services.
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Tercero, J. C. Ordóñez, L. Ramírez Avilés, C. Aguilar Perez et C. A. Sandoval-Castro. « Effect of energy source and supplementation pattern on feed intake and microbial-N supply in dual purpose cows (Bos indicus x B. taurus) ». Proceedings of the British Society of Animal Science 2003 (2003) : 120. http://dx.doi.org/10.1017/s1752756200012795.
Texte intégralRésumé :
The microbial protein synthesis is variable and depend of several of factors, one the most important being the energy sources. Numerous investigations have evaluated individual sugars. However, few quantitative information is available describing the impact of sucrose or its monosacharides (glucose and fructose) and how they compare with other carbohydrate such as starch (Heldt et al., 1999). Chamberlain and Choung (1995) mention that sugar supplementation results in a higher microbial nitrogen supply (MNS) than starch. On the other hand, the amount of nutrients that ruminants can remove from feeds, may be modified by others feeds eaten the same day (Gill and Powell, 1993). Thus, feeding pattern might also affect microbial-N supply (Chamberlain and Choung, 1995). Therefore, the objective of the present work was to compare maize and sugarcane molasses as energy sources as well as the change of feeding pattern (CFP) on DM intake and MNS.
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Moraes, José Evandro de, Túlio Leite Reis, Eduardo Jun Fuzitani, Erval Rafael Damatto Júnior, Camila Memari Trava Maioli, Weber Vilas Bôas Soares, Mauro Sartori Bueno et Valdinei Tadeu Paulino. « In natura residues from peach palm heart industry for ruminant feed ». Acta Scientiarum. Animal Sciences 44 (29 avril 2022) : e54712. http://dx.doi.org/10.4025/actascianimsci.v44i1.54712.
Texte intégralRésumé :
Palm heart processing generates a large amount of residues like leaves, sheath and stems that have potential for ruminant feeding. This study aimed to evaluate the effect of in natura peach palm heart (Bactris gasipaes Khunt.) residues on performance, dry matter (DM) digestibility and intake of ruminants. External sheath was the most suitable residue for sheep, cattle and buffaloes feeding, although sheep presented rejection of 43.5 g kg-1. Thereby, assays of apparent and in vitro dry matter digestibility were done under four feeding treatments, which were the exclusive peach palm sheath, and that one mixed with residues of banana and rice, besides citrus pulp. The experiment was carried out under randomized complete design, with five replications. Greater DM intake (p < 0.05) were observed in animals fed with peach palm sheath mixed with rice (1.12 kg day-1) and mixed with citrus pulp (0.91 kg day-1), however there were no difference among treatments regarding the sheep final weight (p > 0.05). Cattle and buffaloes accept different types of peach palm residues, unlike sheep that present a low rejecting for them. Citrus pulp and rice residue raise the roughage quality. Peach palm residues can be an alternative roughage source to feed ruminants.
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Pacheco, David, Garry Waghorn et Peter H. Janssen. « Decreasing methane emissions from ruminants grazing forages : a fit with productive and financial realities ? » Animal Production Science 54, no 9 (2014) : 1141. http://dx.doi.org/10.1071/an14437.
Texte intégralRésumé :
Ruminants contribute to human food supply and also anthropogenic greenhouse gas (GHG) emissions. An understanding of production systems and information on animal populations has enabled global inventories of ruminant GHG emissions (methane and nitrous oxide), and dietary strategies are being developed to reduce GHG emissions from ruminants. Mitigation strategies need to consider the management/feeding systems used to ensure that these strategies will be readily accepted and adopted by farmers. Housed systems allow diets to be formulated in ways that may reduce GHG production, but the challenge is much greater for systems where animals graze outdoors for long periods. A methane mitigation option in the form of fresh forage would be desirable in livestock production systems with high reliance on grazing. A brief summary of New Zealand research, carried out on fresh grasses, legumes, herbs and crops, suggest that we have an incomplete understanding of the feed characteristics that define a ‘high’ or a ‘low’ methane feed. The variation in methane emissions measured between feeds, individual animals and experiment is large, even in controlled conditions, and the dynamic nature of sward-animal interactions will only exacerbate this variation, creating challenges beyond the identification of mitigants. Furthermore, implementation of knowledge gained from controlled studies requires validation under grazing systems to identify any trade-offs between methane reduction and animal productivity or emission of other pollutants. Therefore, investment and research should be targeted at mitigation options that can and will be adopted on-farm, and the characteristics of temperate grasslands farming suggest that these options may differ from those for intensive (high input/output) or extensive (low input/output) systems.
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Hills, J., I. Kyriazakis, J. V. Nolan, G. N. Hinch et E. Thomson. « Conditioned feeding responses in sheep to flavoured foods associated with sulphur doses ». Proceedings of the British Society of Animal Science 1998 (1998) : 26. http://dx.doi.org/10.1017/s1752756200596781.
Texte intégralRésumé :
The development by ruminants of strong conditioned flavour aversions (CFAs) to foods associated with the administration of LiCl (an artificial toxin) has demonstrated their potential to avoid feeds that cause negative postingestive consequences (Provenza, 1995). Weaker CFAs are formed when they ingest foods with the detrimental secondary plant compound, oxalic acid (Kyriazakis et al. 1997). Moreover, animals may exhibit conditioned preferences (CFPs) for foods supplying appropriate amounts of nutrients such as nitrogen (Provenza, 1995). In this study we tested whether a continuum exists in the formation of CFAs and CFPs to foods that are associated with increasing availability of sulphur (S) in crossbred ewes.
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Hills, J., I. Kyriazakis, J. V. Nolan, G. N. Hinch et E. Thomson. « Conditioned feeding responses in sheep to flavoured foods associated with sulphur doses ». Proceedings of the British Society of Animal Science 1998 (1998) : 26. http://dx.doi.org/10.1017/s0308229600032396.
Texte intégralRésumé :
The development by ruminants of strong conditioned flavour aversions (CFAs) to foods associated with the administration of LiCl (an artificial toxin) has demonstrated their potential to avoid feeds that cause negative postingestive consequences (Provenza, 1995). Weaker CFAs are formed when they ingest foods with the detrimental secondary plant compound, oxalic acid (Kyriazakis et al. 1997). Moreover, animals may exhibit conditioned preferences (CFPs) for foods supplying appropriate amounts of nutrients such as nitrogen (Provenza, 1995). In this study we tested whether a continuum exists in the formation of CFAs and CFPs to foods that are associated with increasing availability of sulphur (S) in crossbred ewes.
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Moyo, Mehluli, et Ignatius Nsahlai. « Consequences of Increases in Ambient Temperature and Effect of Climate Type on Digestibility of Forages by Ruminants : A Meta-Analysis in Relation to Global Warming ». Animals 11, no 1 (13 janvier 2021) : 172. http://dx.doi.org/10.3390/ani11010172.
Texte intégralRésumé :
This meta-analysis evaluated the effects of ruminant feeding type, ambient temperature (AT), and climatic region on the rumen digestibility of feeds. A dataset on nylon bag degradability parameters bearing the chemical composition of roughages, grains, leaves, stems, fruits, concentrates and diets given to animals, climate type, and AT were compiled. Data were analysed using mixed model regression and simple linear regression methodologies. Negative correlations between AT and degradability parameters were observed. Potential degradability (PD) and slowly degradable fraction (‘b’) were higher for concentrates and mixed diets compared to roughages. Intermediate feeders had slower rates of degradation (‘c’) compared to grazers. Potential degradability was highest for studies carried out in cold and temperate climates compared to tropical and arid climates. A 1 °C increase in AT decreased PD by 0.39% (roughages), 0.76% (concentrates), and 2.41% (mixed diets), with an overall decrease of 0.55% for all feed types. The “b” fraction decreased by 0.1% (roughages), 1.1% (concentrates), 2.27% (mixed diets), and 0.35% (all feed types) for every 1 °C increase in AT. Increasing AT by 1 °C increased the neutral detergent fibre content of feeds by 0.4%. In conclusion, increases in AT increased the neutral detergent fibre content of feeds, lowering PD, “b”, and “c” of dry matter in the rumen.
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Yanuartono, Yanuartono, Soedarmanto Indarjulianto, Alfarisa Nururrozi, Hary Purnamaningsih et Slamet Raharjo. « Urea Molasses Multinutrien Blok Sebagai Pakan Tambahan pada Ternak Ruminansia (UREA MOLASSES MULTINUTRIENT BLOCK AS A FEED SUPPLEMENT TO CATTLE) ». Jurnal Veteriner 20, no 3 (27 novembre 2019) : 445. http://dx.doi.org/10.19087/jveteriner.2019.20.3.445.
Texte intégralRésumé :
The poor quality crop residues constitute the bulk of dry matter consumed by the ruminants. Like in most developing countries, including in Indonesia, feed shortage is the main constraint to their productivity. During the hot and dry seasons, the available feed resources are not enough in energy and digestion proteins, which are insufficient to maintenance requirements and reducing productivity throughout the year. The use of conventional feedstuffs such as rice brand, pollard, soybean cake, and groundnut cake to enhance production has become inappropriate. These supplements are in short supply owing to increasing demand from agricultural and industrial users. Their exorbitant prices and erratic supply made them too expensive for small-scale farmers to incorporate them into ruminant feeding. Urea Molasses Multinutrient Block (UMMB) is a convenient and inexpensive method of providing a range of nutrients to ruminants. Giving UMMB can improve low-quality feed digestion so in general can improve the performance of livestock such as milk production, weight, BCS and reproductive status. This article aims to evaluation the benefits of a UMMB for feed ruminants.
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Marcos, Carlos N., Trinidad de Evan, Eduarda Molina-Alcaide, Margarita Novoa-Garrido, Martin Riis Weisbjerg et María Dolores Carro. « Preserving Saccharina latissima and Porphyra umbilicalis in Multinutrient Blocks : An In Vitro Evaluation ». Agriculture 13, no 2 (21 janvier 2023) : 263. http://dx.doi.org/10.3390/agriculture13020263.
Texte intégralRésumé :
Seaweeds could be alternative feedstuffs for ruminants, but their utilization in practical feeding is difficult because they deteriorate rapidly. We investigated the possibility of preserving Saccharina latissima and Porphyra umbilicalis in multinutrient blocks (MB), which is a cost-effective preservation method for high-moisture feeds. Three different MB were prepared: without seaweed (control; CMB), with 25% of fresh S. latissima (SLMB), and with 36% of fresh P. umbilicalis (PUMB). Both seaweeds and MB were fermented in vitro with ruminal fluid from sheep. The nitrogen and fiber content of P. umbilicalis was 4- and 4.5-fold greater, respectively, than in S. latissima, but P. umbilicalis produced less gas than S. latissima. Both CMB and PUMB had similar in vitro dry matter degradability (65.8 and 65.1%, respectively), but SLMB had lower values (p < 0.05; 58.2%). There were no differences among MB in methane and total VFA production, but the VFA pattern was shifted to acetate in SLMB and to butyrate in PUMB. The results indicate that multinutrient blocks could be a feasible option to preserve and store seaweeds for ruminant feeding without compromising ruminal fermentation, but in vivo studies are needed to assess the effects on intake and animal performance.
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Babale, A. Aliyu, Dazala et Wazamda. « INTRODUCTION OF AGRICULTURAL CROP RESIDUES AS SUPPLEMENT FOR GOATS FATTENING AMONG ANIMAL REARERS IN GIPALMA MUBI-SOUTH, ADAMAWA STATE ». International Journal of Research -GRANTHAALAYAH 6, no 6 (30 juin 2018) : 49–66. http://dx.doi.org/10.29121/granthaalayah.v6.i6.2018.1334.
Texte intégralRésumé :
Fattening has been defined as intensive feeding of highly nutritious feed to and promotes fast growth and fat deposition to achieve desired carcass growth and quality. The main strategy is to fatten young, lean male goat to obtain either from the farmer’s own flock or more often, purchased on the open market over a period of two to three months, with each farmer fattening between one and five animals. The goats are usually tethered or kept in a small sheltered enclosure at the homestead, and often fed and watered individually. Basal feeds used for goat fattening, such as hay and millet straw are supplemented with cowpea haulms, maize bran, rice bran and coconut flour which is derived from the crop residues. Poor nutrition is a major constraint in fattening small ruminants in Nigeria, this is because farmers often give the animals whatever is available, leading to waste when feed availability is high, and underfeeding when it is low (feed availability). Fattening of small ruminants as a business is very common in Nigeria. Small ruminants are usually reproduced on the farms or houses and are sold around festivities. (Christmas and Sallah) or when cash is required. No special efforts, other than grazing the animals, are made by many smallholder farmers and pastoralists to ‘’fatten’’ them. A similar situation exists for fattening of large ruminants (bulls) as a business. Most farmers in Nigeria sell their bulls once they have been introduced to ‘’fatten’’ these animals commercially. Goats are able to subsist and make appreciable gains in long dry season with crop residue-based diets that compare favourably with conventional concentrate rations. Some of the crop residues and by-products available are potentially good feed resources which degrade readily in the rumen, some however, have shown poor degradability and hence, require some treatments before they can contribute to animal nutrition.
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Fu, Xuan, Yaopeng Zhang, Bin Shi, Xiaokang Wu, Hongwen Zhao, Zhongbao Xin et Jinshui Yang. « Benzoic Acid Metabolism and Lipopolysaccharide Synthesis of Intestinal Microbiome Affects the Health of Ruminants under Free-Range and Captive Mode ». Life 12, no 7 (18 juillet 2022) : 1071. http://dx.doi.org/10.3390/life12071071.
Texte intégralRésumé :
It is urgent to explore new ways to protect endangered wild animals and develop sustainable animal husbandry on the Qinghai–Tibet Plateau due to its fragile ecological environment. Ruminants, raised in captivity and free-range, have important niches in the Plateau and are the best models to analyze the effects of different feeding modes on their health. In this study, two ruminants, yaks and goats in free-range and captive modes, respectively, were selected to study the relationship between gut microbes and ruminant health. The results showed that the gut microbial diversity of free-range ruminants was higher than those of captive ruminants. Principal co-ordinates analysis (PCoA) showed that there were significant differences in the gut microbial communities in different breeding modes. Both the captive ruminants enriched the Succinivibrionaceae family, which had a strong potential to synthesize lipopolysaccharide, and the low exercise amount of the captive animals was significantly related to this function. Meanwhile, free-range ruminants enriched Oscillospiraceae, which had the potential to degrade benzoic acid, and this potential had a significant positive correlation with resistance to parasitic infections. We offer other possibilities, such as adding benzoic acid to feed or increasing the exercise time of captive ruminants to make them healthier.
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Lagrange, Sebastian P., Jennifer W. MacAdam et Juan J. Villalba. « The Use of Temperate Tannin Containing Forage Legumes to Improve Sustainability in Forage–Livestock Production ». Agronomy 11, no 11 (9 novembre 2021) : 2264. http://dx.doi.org/10.3390/agronomy11112264.
Texte intégralRésumé :
Greenhouse gas emissions from ruminant livestock production systems contribute significantly to the environmental footprint of agriculture. Emissions are lower for feedlot systems than for grass-based systems primarily because of the extra time required for grass-finished cattle to reach slaughter weight. In contrast, legume forages are of greater quality than grasses, which enhances intake and food conversion efficiencies, leading to improvements in production and reductions in environmental impacts compared with forage grasses. In addition, the presence of certain bioactives in legumes such as condensed tannins (CT) enhance the efficiency of energy and protein use in ruminants relative to grasses and other feeds and forages. Grazing tannin-containing legumes also reduce the incidence of bloat and improve meat quality. Synergies among nutrients and bioactives when animals graze diverse legume pastures have the potential to enhance these benefits. Thus, a diversity of legumes in feeding systems may lead to more economically, environmentally, and socially sustainable beef production than grass monocultures or feedlot rations.
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LEGESSE, G., G. ABEBE, M. SIEGMUND-SCHULTZE et A. VALLE ZÁRATE. « SMALL RUMINANT PRODUCTION IN TWO MIXED-FARMING SYSTEMS OF SOUTHERN ETHIOPIA : STATUS AND PROSPECTS FOR IMPROVEMENT ». Experimental Agriculture 44, no 3 (juillet 2008) : 399–412. http://dx.doi.org/10.1017/s0014479708006376.
Texte intégralRésumé :
SUMMARYSmall ruminants are an integral part of mixed-farming systems throughout southern Ethiopia. Yet, they have received little research attention or institutional support. Characterizing the existing small ruminant production systems and analysing their production constraints are important tools to diagnose the status and trends of the systems, and thus to identify areas for future interventions. A survey was conducted between April and July 2004 in the Adilo and Kofele areas of the southern mixed-farming systems of Ethiopia to explore reasons for keeping small ruminants and to evaluate the existing status of and the prospects for the small ruminant sector. Additional information was obtained during discussions with key informants who had experience of small ruminant keeping. Small ruminants fill several roles in the study area. However, the principal purpose of keeping sheep and goats was to generate cash income. Sheep milk consumption was widespread around Kofele unlike most agricultural systems in the country. Nearly all respondents in Adilo reported fattening their sheep before sale, while such a practice was uncommon in Kofele. Informal insurance schemes were evolving among the sheep keepers in Adilo, and these can be considered as entry points for future interventions. The common problem identified from both individual interviews and group discussions was feed shortage. The identification of alternative feed resources and strategic feeding management might be options for development. Small ruminant disease was the major constraint in Kofele, where marshy areas are increasingly assigned for grazing in the rainy season as suitable land is more and more used for cropping. The growing demand for meat from small ruminants, the improving transportation infrastructure and the experience of farmers in small ruminant keeping are providing opportunities to enhance the contribution of the sector. A thorough monitoring of the productive and economic performance of small ruminants is required to capture the full picture of their contribution thereby directing possible intervention areas to maximize benefits to the farmers.
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Vovk, S. O., et I. V. Polovyi. « Scientific and practical aspects of the use of prebiotics in the process of feeding ruminants ». Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 22, no 92 (8 mai 2020) : 9–14. http://dx.doi.org/10.32718/nvlvet-a9202.
Texte intégralRésumé :
The review article presents current literature data on the classification of prebiotics. Information on the characteristics of the most common and used in the feeding of ruminants prebiotic drugs is presented. Based on literature, attention is drawn to the fact that one of the main functions of mannan oligosaccharides is their competitive binding to gram-negative bacteria of the pancreas and cecum in ruminants and inhibition of pathogenic microbiota growth in these departments of gastrointestinal tract. Fructooligosaccharides are not digested by animals, starting from the oral cavity and ending with the intestines. They are readily available substrates for the microflora of the ruminant pancreas and large intestine of animals. As for galactosyloligosaccharides, experiments have convincingly proven that they stimulate the growth and development of bifidobacteria and lactobacilli, enterobacteria and streptococci in the digestive tract of animals. Lactulose and lactiol as prebiotics have a positive effect on feed intake in young animals, changing the microbial balance and biochemical composition of the contents of the cecum. These prebiotics promote the reproduction of gram-positive bacteria in the digestive tract of animals and inhibit the growth and development of clostridia. Lactulose and lactiol activate the formation of short-chain fatty acids by the microbiota of the cecum of animals, as well as increase the permeability of the intestinal mucosa and the solubility of minerals in the colon. High molecular weight beta-glucans enhance the phagocytic, cytotoxic and antimicrobial activity of macrophages. They help to produce reactive intermediates of oxygen and nitrogen and clean the tissues of apoptotic cells. Furthermore, stimulating innate immune responses, beta-glucans increase the production of anti-inflammatory cytokines and chemokines. Inulin in ruminants has a pronounced activating effect on the immune system, as well as activates the production of short-chain fatty acids in the pancreas and large intestine. The biological mechanism of action in the digestive tract of ruminants of such prebiotics as: mannan oligosaccharides, fructooligosaccharides, galactooligosaccharides, lactulose, lactiol, beta-glucans, inulin is described. The productive effect of prebiotics when using their additives in the diets of young and adult ruminants is characterized. It is shown that the use of the above prebiotic drugs in the feeding of ruminant species selectively stimulates the metabolic processes of the symbiotic microflora of the pancreas and cecum, activates their vital functions and growth. The use of prebiotic supplements in the diets of cows stimulates milk productivity and improves milk quality. In fattening cattle, the stabilization of the pH of the scar content through the use of prebiotics increases the average daily gain and live weight of animals and the efficiency of assimilation of nutrients in feed.
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Işık, Özgün, et Figen Kırkpınar. « Etlik Piliç Üretiminde Beslemenin Çevre Kirletici Emisyonlar Üzerine Etkisi ». Turkish Journal of Agriculture - Food Science and Technology 8, no 1 (31 janvier 2020) : 234. http://dx.doi.org/10.24925/turjaf.v8i1.234-238.3105.
Texte intégralRésumé :
Environmental pollution is defined as the disruption of normal ecological balance with emmision of various substances and energy residues as a result of human activities. Animal production is one of the major human activity that enables this emission to increase significantly. Although ruminants play an important role in the effects of animal production on environmental pollutant emissions, the effects of poultry production and broiler production are also worth considering. As in all livestock types, the main factor that has a direct impact on environmental pollutant emissions is feeding for this animal types too. High nutrient needs of broilers and production processes of feed containing these nutrients; greenhouse gas causes increased nitrogen and phosphorus emissions; consequently, they cause air, soil and water pollution to multiply. Changes in protein and amino acid levels or the use of certain feed additives in feeds affect the emission value of broiler production. In addition, the feeding methods also has an effect on these emission values. When these effects are taken into consideration, it is possible to reduce the emission values in broiler production. In this review, environmental effects of broiler nutrition examined in terms of feed production, nutrient emission by manure, presentation of feed and feed form.
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Mahgoub, Osman, Isam T.Kadim, Hamza A. Babiker et Mohammed N. Al-Kindi. « The Influence of Diets Containing Phenols and Condensed Tannins on Protein Picture, Clinical Profile and Rumen Characteristics in Omani Sheep ». Sultan Qaboos University Journal for Science [SQUJS] 19, no 2 (1 février 2015) : 8. http://dx.doi.org/10.24200/squjs.vol19iss2pp8-16.
Texte intégralRésumé :
A study was carried out to investigate the effects of feeding low quality non-conventional feeds (NCF) containing phenols and condensed tannins on health and performance characteristics in Omani sheep. Twelve Omani sheep were fed one of two base roughages, urea-treated palm frond (UTPF) or Rhodesgrass hay, (RGH) plus a commercial concentrate for 63 days. Haematological, serum biochemical and urine analyses were used to assess sheep health. Serum protein fractions were measured using electrophoresis. Urea-treated palm frond contained higher levels of polyphenols and condensed tannins and fiber than Rhodesgrass hay or concentrate feed. Animals fed UTPF had lower feed intake (P<0.05) and lower body gain (P<0.001) than those fed RGH. Rumen liquor of UTPF-fed animals had higher pH, ammonia-nitrogen and butyric fatty acid but lower acetic fatty acid (P<0.05). Animals fed UTPF had higher neutrophil (P<0.05) but lower lymphocyte (P<0.05) and monocyte (P<0.001) counts by the end of the trial than those fed RGH. There were no effects of diet on serum albumin or globulin fraction levels or albumin:globulin ratio. There were no major effects on urine analysis but there was a trend by control animals to have higher protein and specific gravity than treated ones. This study indicated that feeding low quality non-conventional feeds containing polyphenols or tannins would reduce body gain and may produce some effects on clinical parameters. Although tannins are known to influence protein digestion and absorption in ruminants, it did not significantly affect the serum protein picture in sheep.
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Wang, Lin, Miao Lin, Yuwei Yang, Dalin Liu et Guoqi Zhao. « PSVII-13 Evaluation of Ginkgo Leaf as a Feed for Ruminants by Using in Vitro gas Production Technique ». Journal of Animal Science 100, Supplement_3 (21 septembre 2022) : 385–86. http://dx.doi.org/10.1093/jas/skac247.704.
Texte intégralRésumé :
Abstract The objective of this study was to examine the fermentation characteristics of ginkgo leaf compared with traditional feeds, rice straw, alfalfa and soybean meal, by using in vitro gas production technique. Three ruminal cannulated Chinese Holstein dairy cows were fed a total mixed ration. Rumen fluid was collected via from a ruminal cannula before feeding and then filtered through four layers of cheesecloth. Samples (220 mg air-dried) of rice straw, alfalfa, soybean meal and ginkgo leaf were placed in each glass bottle (150 mL), and 30 mL mixed solution with rumen fluid and a buffer solution (1:2 v/v). Three replicates of each sample were incubated in shaking bath at 39 °C for 48 h. The gas production was measured at 0, 3, 6, 9, 12, 24 and 48 h, respectively. The gas production data were fitted to the non-linear model Y = A + B (1 – e-CT). The results demonstrated that the ginkgo leaf had significantly greater in vitro gas production compared with the other feeds at each observation time. The amount of gas production from the immediately soluble fraction (A) of the four test feeds were all positive. The gas production from the insoluble fraction (B) of alfalfa was least at 43.82 mL and ginkgo leaf showed significantly greater B values than alfalfa. The gas production rate (C) was significantly greater for ginkgo leaf than those C values for rice straw and soybean meal. The in vitro dry matter and crude protein digestibility (%) of ginkgo leaf were 99.6 and 98.7, respectively, which were significantly greater than those of soybean meal. The total volatile fatty acid production of ginkgo leaf was significantly greater than that of rice straw, and the ammonia concentration of ginkgo leaf decreased significantly. It indicated that ginkgo leaf could be used as a protein source feed for ruminants.
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Torres-Fajardo, Rafael Arturo, Pedro Geraldo González-Pech, Juan Felipe de Jesús Torres-Acosta et Carlos Alfredo Sandoval-Castro. « Nutraceutical Potential of the Low Deciduous Forest to Improve Small Ruminant Nutrition and Health : A Systematic Review ». Agronomy 11, no 7 (13 juillet 2021) : 1403. http://dx.doi.org/10.3390/agronomy11071403.
Texte intégralRésumé :
Nutraceuticals are defined as livestock feeds that combine their nutritional value with their beneficial effects on animal health. We analyzed the outcomes from nearly 20 years of research assessing the nutraceutical properties of plants consumed by sheep and goats in low deciduous forests. A systematic review of different databases suggested 31 peer-reviewed manuscripts according to pre-established criteria. Amongst these, 16 manuscripts described in vitro evaluations investigating the bioactivity of plant secondary compounds in the extracts of 12 plant species. Most of these studies used the abomasal nematode Haemonchus contortus as the parasite model. Meanwhile, 11 manuscripts reported in vivo trials under controlled pen conditions, evaluating the relationships between the intake of leaves from different plant species and their secondary compounds and animal nutrition, performance, and gastrointestinal nematode infections. Additionally, four manuscripts described studies under natural feeding conditions. Altogether, the studies showed the inherent complexity of the relationship between small ruminants, plants, nutrients, secondary compounds, and gastrointestinal nematodes in natural feeding systems. Several plant species can be considered good candidates for nutraceutical use. Our findings warrant future work to understand the relationship between plants, ruminants, and their parasites, with the aim to improve the sustainability of production systems based on the native vegetation of tropical forests.
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Leng, RA. « Quantitative ruminant nutrition — a green science ». Australian Journal of Agricultural Research 44, no 3 (1993) : 363. http://dx.doi.org/10.1071/ar9930363.
Texte intégralRésumé :
Knowledge of quantitative digestion and metabolism in ruminants was developed most rapidly when isotope dilution techniques became easy to apply, facilitated by improved instrumentation and mathematical approaches. The Armidale group led by Professor E. F. Annison and Dr D. B. Lindsay were at the forefront of these developments in the late 1950's. Since then knowledge in this area has developed at an ever increasing rate. The data that accumulated from the quantitative approach led to simple or complex models of animal digestion, metabolism and growth. These in turn led to much questioning of the dogma of feed evaluation and feeding standards as they applied in practice, especially for ruminants fed on poor quality forages. The knowledge that developed has clearly shown that the way toward substantial increases in productivity of ruminants on forage based diets is through the balanced nutrient approach that considers the efficiency of the rumen ecosystem and the availability of dietary nutrients post-ruminally. With increasing emphasis on quality-beef markets at the present time, it seems likely that the time is ripe for application of much of this knowledge. The major breakthroughs have come about by recognition of the nutrients required to balance a ruminant's diet where the animal depends on the end-products of rumen fermentation (i.e. on a forage-based diet). When this is achieved, the increase in efficiency of use of nutrients lifts the overall nutrition of the animal to a level that is well above that predicted from feeding standards, based on the metabolizable energy content of the supplement or the total diet. This understanding, together with the stoichiometry of rumen fermentation, has indicated an important approach to help ameliorate the greenhouse effect, that is, lowering of enteric methane production per unit of feed intake or per unit of animal products from ruminants by strategic supplementation.
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Azando, Erick Virgile Bertrand, Esaïe Tchetan, Thierry Dèhouegnon Houehanou, Carlos Cédric Ahoyo, Modeste Fadéby Gouissi, Ingrid Sonya Mawussi Adjovi et Sanni Yô Doko Allou. « Traditional breeding of small ruminants in the North-West of Benin : practices and inventory of food resources ». International Journal of Biological and Chemical Sciences 16, no 3 (28 août 2022) : 1180–92. http://dx.doi.org/10.4314/ijbcs.v16i3.22.
Texte intégralRésumé :
The northern part of Benin is a favourite area for ruminant breeding in view of its pastoral resources and the many other assets it has at its disposal. The objectives of this study were (i) to characterize small ruminants rearing practices in north-western Benin, (ii) to assess factors that affect the described practices (iii) and to inventory the feed resources used in the ruminant breeding. To achieve these objectives, a retrospective survey was carried out in four municipalities located at north-west Benin. The results showed that sheep and goats are mostly raised by men (94.93%). Digestive disorders (90.41%) are the main diseases encountered. The results of linear regression analysis showed that sociocultural group and education level of the respondents have a significant influence on the mode of management and the practice of castration of small ruminants. Feeding was based on fodder from natural rangelands, notably Rottboellia cochinchinensis and Adenodolichos paniculatus. These fodders content respectively, 17.71% and 20.4% of Total Nitrogen Matter (TNM). Breeders used crop residues, notably legume tops, food processing residues and fodder trees during the lean season. In view of this multitude of food resources, possibilities for improving the existing small ruminants breeding system are proposed.
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Trotta, Ronald J., David L. Harmon, James C. Matthews et Kendall C. Swanson. « Nutritional and Physiological Constraints Contributing to Limitations in Small Intestinal Starch Digestion and Glucose Absorption in Ruminants ». Ruminants 2, no 1 (23 décembre 2021) : 1–26. http://dx.doi.org/10.3390/ruminants2010001.
Texte intégralRésumé :
Increased efficiency of nutrient utilization can potentially be gained with increased starch digestion in the small intestine in ruminants. However, ruminants have quantitative limits in the extent of starch disappearance in the small intestine. The objective is to explore the nutritional and physiological constraints that contribute to limitations of carbohydrate assimilation in the ruminant small intestine. Altered digesta composition and passage rate in the small intestine, insufficient pancreatic α-amylase and/or small intestinal carbohydrase activity, and reduced glucose absorption could all be potentially limiting factors of intestinal starch assimilation. The absence of intestinal sucrase activity in ruminants may be related to quantitative limits in small intestinal starch hydrolysis. Multiple sequence alignment of the sucrase-isomaltase complex gives insight into potential molecular mechanisms that may be associated with the absence of intestinal sucrase activity, reduced capacity for intestinal starch digestion, and limitations in the efficiency of feed utilization in cattle and sheep. Future research efforts in these areas will aid in our understanding of small intestinal starch digestion and glucose absorption to optimize feeding strategies for increased meat and milk production efficiency.
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Vandermeulen, Sophie, Carlos Alberto Ramírez-Restrepo, Yves Beckers, Hugues Claessens et Jérôme Bindelle. « Agroforestry for ruminants : a review of trees and shrubs as fodder in silvopastoral temperate and tropical production systems ». Animal Production Science 58, no 5 (2018) : 767. http://dx.doi.org/10.1071/an16434.
Texte intégralRésumé :
Among the oldest agroforestry systems, silvopastoralism uses shrubs and trees to feed ruminants. The practice is common in extensive livestock production systems, whereas the intensification of grass-based systems in the past century has led to the removal of woody species from agricultural temperate landscapes. In Europe however, woody species are promoted again on grasslands through environment-friendly policies due to the ecosystem services they provide such as carbon sequestration, control of soil erosion, limitation of airborne pollutants and biodiversity conservation. Positive effects of browse on rumen digestion and parasite control have also been documented across different plant species and regions. Under optimal conditions, feeding ruminants from woody fodder sustains animal production. Nonetheless, limitations can restrict the use of woody forage into animal diets, such as the presence of anti-nutritive and toxic compounds. The incorporation of this resource in ruminant feeding systems raises the question of the management of the interface between the plant and the animal. Various management systems are practiced. Temperate species such as Salix spp. and Populus spp. are fed to sheep and cattle in fodder blocks or by pruning trees in New Zealand, and Fraxinus spp. or Corylus avellana in hedgerows supply forage to livestock in Belgium, whereas Leucaena leucocepahala and Desmanthus spp. browsing is common in Australia. Nowadays, ensiling and pelleting techniques are being developed as a way to store browse forage. As the renewed interest in using shrubs and trees to feed ruminants is recent, especially in temperate regions, additional research about the optimal introduction of this resource within systems is needed.
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Stockdale, C. R., et J. R. Roche. « A review of the energy and protein nutrition of dairy cows through their dry period and its impact on early lactation performance ». Australian Journal of Agricultural Research 53, no 7 (2002) : 737. http://dx.doi.org/10.1071/ar01019.
Texte intégralRésumé :
This review considers the current literature on the energy and protein nutrition of dry cows and its subsequent impact on early lactation performance. Energy intake close to calving appears to be critical to events that occur post-partum, such that a key objective of dry cow feeding should be to maximise or maintain feed intake immediately prior to calving, or at least to minimise the decline in intake. Although a decline in dry matter intake seems to be a normal adaptive event in peri-parturient ruminants, it is the magnitude and duration of the decline that are of concern. Most research has been undertaken using total mixed rations or conserved forage and concentrates, where a wide range of quantities and types of feeds have been used. However, no clear conclusions can be drawn regarding optimum levels of feeding, types of forage, or proportions of concentrates that should be fed to cows in the late dry period to minimise the intake decline. The importance of maintaining energy intake is associated with the reduction of the incidence and severity of metabolic diseases post-partum, by reducing triglyceride mobilisation from adipose tissue, and preventing excessive depletion of hepatic glycogen levels.
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Tolkamp, B. J., et J. J. M. H. Ketelaars. « The effect of ad lib feeding on the efficiency of energy utilization in growing and lactating cattle ». Proceedings of the British Society of Animal Production (1972) 1993 (mars 1993) : 55. http://dx.doi.org/10.1017/s0308229600023825.
Texte intégralRésumé :
Recently, we have proposed a new theory of feed intake regulation in ruminants (Ketelaars and Tolkamp, 1992a,b; Tolkamp and Ketelaars, 1992). This theory attributes great significance to the efficiency of metabolizable energy (ME) utilization for feed intake regulation. In brief, we assume that feed intake behaviour of ruminants aims at maximizing the ratio of net energy intake (representing the benefits of feeding) relative to oxygen consumption (representing the metabolic costs of feeding). Starting from this assumption, we have shown that knowledge of the efficiency of ME utilization obtained under conditions of restricted feeding can be used successfully to predict voluntary intake (Tolkamp and Ketelaars, 1992).If, indeed, voluntary feed intake and the efficiency of ME utilization are so intimately related, the question comes up what the effect of ad lib feeding is on the overall efficiency of ME utilization (total net energy intake, NEI, as a fraction of ME intake, MEI). This paper investigates this question by means of model calculations for growing and lactating cattle according to the UK energy evaluation system.
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Marques, Orlando Filipe Costa, Eleuza Clarete Junqueira de Sales, Flávio Pinto Monção, Ariadne Freitas Silva, João Paulo Sampaio Rigueira, Daniel Ananias de Assis Pires, Leidy Darmony de Almeida Rufino et Hellén Felicidade Durães. « Potential for using dehydrated banana peel as an additive in grass silage ». Caderno de Ciências Agrárias 13 (15 novembre 2021) : 1–8. http://dx.doi.org/10.35699/2447-6218.2021.32807.
Texte intégralRésumé :
Among the techniques for conserving forage for herbivore feeding, the production of grass silage has beenwidely used in recent times in tropical regions, however, the low content of dry matter and carbohydrates in these forages can hamper the fermentation of ensiled biomass. In this regard, the dehydrated banana peel presents itself as an alternative as an additive in the production of grass silage. Given the above, the objective of this review was to present the main aspects of the use of dehydrated banana peel as an additive in the production of grass silage. The review was developed through the search for selected terms, such as: “grass silages”, “banana residues”, “additives”. The terms were searched in the Google Scholar, Scielo, PubMed, Elsevier, Science Direct, Capes Periodical databases. The banana peel has bromatological characteristics that make it a good alternative for use in the feeding of ruminants, with carbohydrate values of up to 32.4% of dry matter, as well as a source of protein, ether extract, minerals, and essential amino acids. Because it presents good nutritional values compared to citrus and cassava peel, the banana peel has been used in the feeding of ruminants by small producers in tropical regions, where the use of by-products has the purpose of having lower feeding costs. The use of dehydrated banana peel is an alternative to be used as na additive in the production of grass silage and ruminant feed due to its nutritional characteristics.
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Ayasan, Tugay. « Moringa (Moringa Oleifera)’nın Kanatlı ve Ruminant Hayvan Beslemede Kullanılması ». Turkish Journal of Agriculture - Food Science and Technology 3, no 6 (24 mars 2015) : 425. http://dx.doi.org/10.24925/turjaf.v3i6.425-429.327.
Texte intégralRésumé :
The poultry industry in the developing countries is facing some challenges, one of which is an increase in the cost of feed because of high prices of protein and energy sources. Moringa oleifera is a rich source of protein and crude fiber content. The crude protein (CP) content of Moringa ranges from 7.12 to 39.17%. Negligible content of tannins and other anti-nutritive compounds and offers an alternative source of protein to ruminants and non-ruminants. Although rich in nutrients such as protein and minerals, Moringa oleifera is one of those plants that have not been studied for many years. In addition, they are also faced with the problem of the development of antibiotic resistant pathogens due to unwise and excessive use of antibiotics. In this paper, feeding studies made on the Moringa oleifera used in nutrition of poultry and ruminant species have been reviewed.
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Shah, Ali Mujtaba, Izhar Hyder Qazi, Maharach Matra et Metha Wanapat. « Role of Chitin and Chitosan in Ruminant Diets and Their Impact on Digestibility, Microbiota and Performance of Ruminants ». Fermentation 8, no 10 (17 octobre 2022) : 549. http://dx.doi.org/10.3390/fermentation8100549.
Texte intégralRésumé :
The slow progress in the development of the subsector, particularly of alternative feed sources such as agro-industrial byproducts and unconventional feed resources, has deepened the gap in the availability of and accessibility to animal feed. Production of animal feed is highly resource demanding. Recently, it has been shown that increasing climate change, land degradation, and the recurrence of droughts have worsened the feed gap. In the backdrop of these challenges, there has been attention to food-not-feed components, which have great potential to substitute human-edible components in livestock feeding. Chitosan, a non-toxic polyglucosamine, is widely distributed in nature and used as a feed additive. Chitosan is obtained from the de-acetylation process of the chitin and is mostly present in shrimp, crabs, and insect exoskeletons, and has antimicrobial and anti-inflammatory, anti-oxidative, antitumor, and immune-stimulatory hypo-cholesterolemic properties. This review article discusses the results of recent studies focusing on the effects of chitosan and chitin on the performance of dairy cows, beef steers, sheep, and goats. In addition, the effects of chitosan and chitin on feed intake, feed digestibility, rumen fermentation, and microbiota are also discussed. Available evidence suggests that chitosan and chitin used as a feed additive for ruminants including dairy cows, beef steers, sheep, goats, and yaks have useful biological effects, including immune-modulatory, antimicrobial, and other important properties. These properties of chitosan and chitin are different from the other feed additives and have a positive impact on production performance, feed digestibility, rumen fermentation, and bacterial population in dairy cows, beef steers, sheep, goats, and yaks. There is promising evidence that chitosan and chitin can be used as additives in livestock feed and that well-designed feeding interventions focusing on these compounds in ruminants are highly encouraged.
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Chen, Jiashun, Fang Wang, Yexin Yin et Xiaokang Ma. « The nutritional applications of garlic (Allium sativum) as natural feed additives in animals ». PeerJ 9 (10 août 2021) : e11934. http://dx.doi.org/10.7717/peerj.11934.
Texte intégralRésumé :
Garlic (Allium sativum) is an essential vegetable that has been widely utilized as seasoning, flavoring, culinary and in herbal remedies. Garlic contains several characteristic organosulfur compounds, such as diallyl sulfide, allicin (diallyl thiosulphate), γ-glutamylcysteine, and S-allyl cysteine (alliin) and ajoene, which garlic has beneficial effects on inflammation, oxidative stress markers, hypertension, hyperlipidaemia and endothelial function in vitro or in animal model. These bioactive molecules are also playing pivotal role in livestock and fisheries production apart from its application in humans. Supplementation of animal feed with garlic and its related products is consistent with the modern agricultural concept of organic animal husbandry. This review compiles the information describing the effects of feeding garlic and its extracts on selected performance parameters in animals (chicken, rabbits, ruminants, pigs and fish). This review may provide reference for scientists and entrepreneurs to investigate the applications of feeds added with garlic and allicin by-products for the improvement of animal husbandry and aquatic production.