To see the other types of publications on this topic, follow the link: Barley Nutrition.
Dissertations / Theses on the topic 'Barley Nutrition'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Barley Nutrition.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Lonergan, Paul Francis. "Genetic characterisation and QTL mapping of zinc nutrition in barley (Hordeum vulgare)." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phl847.pdf.
Full text
2
Gould, Nicholas. "The role of phloem in K'+ nutrition of barley (Hordeum Vulgare L.)." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395733.
Full text
3
Foroutan-Pour, Kayhan. "Aspects of barley post-anthesis nitrogen physiology." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22730.
Full textAbstract:
The protein concentration of cereal grains is low and the production of cereal crops with increased grain protein concentrations is desirable. This work investigates the physiological aspects of protein accumulation potential in barley grain. A recently developed perfusion system was used in four experiments conducted in 1993 and 1994. In the field experiment, plants were allowed to take up urea at 15 or 30 mM N, or ethephon at 15 $ mu$ M. Abscisic acid and 2,4-D decreased total seed weight spike$ sp{-1}$. Gibberellic acid and 2,4-D increased seed protein concentration and content, while ABA decreased both of these. Kinetin and abscisic acid treatments resulted in the highest and lowest levels, respectively for flag leaf photosynthesis, stomatal conductance, transpiration and intercellular CO$ sb2$ concentration. Both protein content spike$ sp{-1}$ and seed protein concentration were elevated in plants fertilized with 10.7 mM N via the soil and plants perfused with 30 mM N via the peduncle. Plants receiving treatments of 10.7 mM N from the soil and mixture of 30 mM N and GA$ sb3$ or 2,4-D through the peduncle had increased protein content seed$ sp{-1}$, and the highest seed weight spike$ sp{-1}$, respectively. Peduncle perfusion with 30 mM N increased spike protein concentration and content and grain protein concentration without affecting seed weight spike$ sp{-1}$. Grain protein concentration was increased by peduncle perfusion with ethephon. The perfusion technique worked well under field conditions. (Abstract shortened by UMI.)
4
Genc, Yusuf. "Screening for zinc efficiency in barley (Hordeum vulgare L.)." Title page, table of contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phg324.pdf.
Full textAbstract:
Bibliography: leaves 229-250. The aims of the study were to develop a reliable method for screening for Zn efficiency as an alternative to the current field-based methods, and to determine the extent of genotypic variation in tolerance to Zn deficiency in barley.
5
Ramesh, Sunita. "Molecular mechanism of zinc uptake and regulation in cereals." Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phr1724.pdf.
Full textAbstract:
Bibliography: leaves 174-204. "This work provides a starting point for understanding the molecular mechanisms of zinc uptake and the regulation of zinc transport in cereals. Zinc efficient cereals would yield more on soild with low zinc and could potentially result in increased zinc content grain."
6
Ali, Arshad. "Growth and yield of barley (Hordeum vulgare L.) as affected by salinity and mixed ammonium and nitrate nutrition." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186385.
Full textAbstract:
Absorption and utilization of N by plants has been shown to be affected by the N form supplied and salinity. This study was conducted to determine the growth and N uptake of barley grown in modified Hoagland-Arnon nutrient solution containing different NH₄⁺-N / NO₃⁻-N ratios and various salinity levels in the growth chamber. The first experiment was conducted to study the N uptake rate at five different NH₄⁺-N/NO₃⁻-N ratios and three salinity levels (0, 6 and 12 bars). No ¹⁵N was applied in this experiment. The second experiment was conducted with the same objectives with modification in the salinity levels based upon the results of experiment 1. The salinity levels were 0 and 8 bars. The third experiment was similar to the second experiment except the duration of the study that was 45 days instead of 30 days. The NH₄⁺-N/NO₃⁻-N ratios were 0/100, 25/75, 50/50, 75/25 and 100/0. The total N concentration in all treatments was 100 ppm. Solutions were sampled after every 15 days during all experiments and analyzed for ammonium and nitrate concentration. For the short term ¹⁵N uptake study (experiments 2 and 3), either ammonium labelled ¹⁵N or nitrate labelled ¹⁵N was added to each NH₄⁺-N/NO₃⁻-N treatment for 6, 12, and 24 hours period on the last day of experiment 2 and 6, 12, and 18 hours period on the last day of experiment 3. Mixed N nutrition resulted in greater accumulation of whole plant-N than plants receiving only NO₃⁻ or NH₄⁺ as the source of N. Labelled nitrate recovery was highest in the 50% NH₄⁺ treatment. The same trend was evident from the solution sample analysis. In all the three experiments, plants produced significantly higher dry matter yields when grown with mixed N nutrition than with NH₄⁺ or NO₃⁻ alone. Total dry matter production, nitrogen uptake, root and shoot N contents, ¹⁵N content and water uptake decreased with increasing salinity levels in all the three experiments. The plants fed with ¹⁵NO₃⁻ source inhibited nitrate uptake more severally under saline conditions than the NH₄⁺-fed plants under similar conditions. Salinity and N nutrition interaction was found significant in all experiments.
7
Khazaal, Kamal Abdul-Rahim. "Improving the nutritive value of barley straw for ruminants : effects of treatment with ligninase enzyme or white-rot fungi on composition and digestibility in vitro." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252722.
Full text
8
Coaquira, Arratia Karla. "Metabolic profile and live weight of male llamas (Lama glama) fed with barley hay, alfalfa, and quinoa scrub." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/5350.
Full textAbstract:
In recent years llamas have attracted great national and international interest for their qualities of human food production, fiber production for high-quality textiles, and for being an ecological animal. These qualities have allowed a resurgence of cultivating them for commercial ends. One of the principal limits is secure food for allowing a constant, sustainable growth. The objective of this study was to evaluate the metabolic profile and live weight of male llamas (Lama glama) fed with barley hay, alfalfa hay, and quinoa scrub. The fieldwork occurred in metabolic chambers in a closed environment at the demonstration farm of the Benson Agriculture and Food Institute (of Brigham Young University) located in the community of Letanys, in Viacha municipality. Three types of food--100% barley hay, 80% barley hay + 20% alfalfa hay, and 80% barley hay + 20% quinoa scrub--were offered randomly to seven llamas averaging three years old. A channel allowed the placement of a one-meter probe that collected jugular blood, the plasma of which was analyzed in the animal nutrition laboratory of UAC-Tiahuanaco. The average metabolites in the blood plasma were not significantly different (p>0.05) according to treatment except for GPT enzyme, with CV=20.5 Weight gain showed no significant difference (p>0.05) between treatments nor between blocks. Regarding percentage of food absorbed, 90% was consumed and 64% was absorbed. It was found that animals subjected to the three different diets lost weight due to the stressful experimental conditions of physiologic administration of saline and heparine during sample collection. In conclusion, the recommended feed is the diet consisting of barley hay and quinoa, followed by barley hay and alfalfa, both of which are recommended to supplement the feeding of llamas. Also, animals with better physical constitution and a tranquil temperament respond best to the treatments.
9
Sadeghzadeh, Behzad. "Mapping of chromosome regions associated with seed zinc accumulation in barley." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0204.
Full textAbstract:
[Truncated abstract] Zinc deficiency in crops is the most widespread micronutrient deficiency, with about 50% of the cereal-growing areas worldwide containing low levels of plant-available Zn. Zinc plays multiple key roles in different metabolic and physiological processes; its deficiency in crops reduces not only grain yield, but also the nutritional quality of grains. Insufficient micronutrient intake, particularly Zn and Fe, afflicts over 3 billion people in the world, mainly in developing countries. Increasing the amount of Zn in food crops can contribute to improving the Zn status of people. Furthermore, Zn-dense seeds have agronomic benefits, resulting in greater seedling vigour, bigger root system and higher crop yield when sowed to soils with low plant-available Zn. Enhancing nutrient content and nutritional quality of crops for human nutrition is a global challenge currently, but it was mostly ignored during the breeding process in the past. There is a significant genotypic variation for seed Zn accumulation in several crops (including barley) which could be exploited in the breeding programs to produce genotypes with higher seed Zn concentration and content. However, the progress in Zn efficiency until now has mainly relied on conventional plant breeding approaches that have had limited success. Therefore, reliable alternative methods are required. Enhancing mineral nutrition through plant biotechnology may be a sustainable and beneficial approach in developing Zn-dense seeds in the staple crops. ... This DNA band was sequenced and converted into a simple sequence-specific PCR-based marker, which was designated as SZnR1 (seed Zn-regulator1). The developed marker is very easy to score, is inexpensive to run and amenable for a large number of plant samples. The successful development of SZnR1 molecular marker linked to chromosome region associated with seed Zn concentration and content using MFLP in this study illustrates the advantage of this technique over some other DNA fingerprinting methods used for identification of molecular markers for marker-assisted selection (MAS). In conclusion, the greater Zn efficiency of Sahara over Clipper under sufficient Zn supply may be attributed to its higher uptake of Zn. It appears that soil-based pot experiments under controlled condition may offer potential improvements over field experiments in screening for seed Zn accumulation. Shoot and seed Zn concentration and content can be used to diagnose the Zn statues of barley genotypes, and may be a useful selection criterion for Zn efficiency in large populations like doubled-haploid populations aimed at developing molecular markers for Zn efficiency. Identified QTLs influencing seed Zn concentration were repeatable in the field and glasshouse conditions, suggesting their robustness across environments as well as their value in marker-assisted selection. The developed PCR-based marker SZnR1 and other molecular markers associated with the QTLs on the short and long arms of chromosome 2H have the potential to be used for marker-assisted selection in breeding for Zn-dense seed in barley.
10
Llanos, Pérez Martha Jesusa. "In vivo digestibility in llamas (Lama glama), fed with barley and paja brava at the C.E.A.C." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/5384.
Full textAbstract:
The Highlands of Bolivia present a great diversity of native botanical species with strong forage characteristics, providing them with a considerable potential for usage as a resource in the feeding of cattle. The following work was performed with the idea of taking advantage of the zone’s native species as a source for the feeding of llama cattle. In order to accomplish it, we took into consideration the following variables: food consumption, water consumption, amount of fecal excretions, urine volume, body weight, and the digestibility of the nutrients found in the food prepared with paja brava and barley (ash, protein, fiber, and total digestibles). The experiments were conducted in metabolic cages for 30 days; with 4 llamas of the K’ara breeds, between the ages of 4 and 5 years old, and an average weight in between 105 and 125 kg of life weight. The statistical analysis was conducted using a completely random cross test. We concluded barley and paja brava in their natural state are forage species which nutrient composition does not allow optimal development in llamas.
11
Matoka, Charles Mboya. "Bacterial community responses to soil-injected liquid ammonium nutrition and effect of temperature on Barley (Hordeum vulgare L.) grain yield formation." Göttingen Cuvillier, 2007. http://d-nb.info/987473530/04.
Full text
12
Matoka, Charles Mboya. "Bacterial community responses to soil-injected liquid ammonium nutrition and effect of temperature on Barley (Hordeum vulgare L.) grain yield formation /." Göttingen : Cuvillier, 2008. http://d-nb.info/987473530/04.
Full text
13
Badresingh, Vera. "Evaluation of low phytate barleys and in vitro procedure for predicting phosphorus availability in organic and inorganic sources of phosphorus /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025597.
Full text
14
Castro, Calvache Egresado Hever Patricio. "Formulation of Balanced Diets in Base of Grains of Left-over of Corn, Wheat, and Barley for Guinea pigs (Cavia porcellus)." BYU ScholarsArchive, 2002. https://scholarsarchive.byu.edu/etd/5345.
Full textAbstract:
The present investigation was carried out in the rural community La Rinconada, located in the canton Ibarra of the province of Imbabura. The field work was developed during 12 months. Previous activities were developed to the rehearsal like socialization of the program; training in areas of: poscosecha of grains, alfalfa cultivation and systems of growth of guinea pigs. The rehearsal lasted 70 days and it was developed in the property of three families of the community. The formulation of diets balanced based on grains of waste of corn, wheat and barley for the growth and increment of weight of guinea pigs, it was the main objective from the investigation. The rehearsal was carried out with 84 weaned male guinea pigs of the improved Creole type, acquired in a farm of guinea pigs, of the province of the Carchi. It was used, experimental design of complete blocks at random (DBCA) with a factorial arrangement A x B + 1 and three repetitions. The factor A it was conformed by three formulations of balanced. The balanced 1 (B1) had as protein source the soy cake, the balanced 2 (B2) had as protein source the bean and the balanced 3 (B3) had as protein source the pea. The factor B it was conformed by two forage types : alfalfa (Medicago sativa L.), forage 1 (F1) and the mixture forager pastures and boil of the community forage (F2). The witness treatment T7, was the traditional feeding of guinea pigs, in the community. Was used: kitchen waste, crop waste and boil and pastures of the community. The treatments were seven : T1 (Balanced 1 + alfalfa), T2 (Balanced 1 + pastures and boil of the community), T3 (Balanced 2 + alfalfa), T4 (Balanced 2 + pastures and boil of the community), T5 (Balanced 3 + alfalfa), T6 (Balanced 3 + pastures and boil of the community) and T7 witness treatment (traditional feeding). The evaluated variables were consumption of dry matter, increase of biweekly weight, nutritious conversion, mortality and production costs. The experimental unit was conformed by four weaned male guinea pigs. Of the obtained results it concludes that the Balanced 1 and Balanced 3 were the best. The mixture foragers, pastures and boil of the community presented superior results to those of the alfalfa . The treatment witness (traditional feeding of the community) it is not advisable, the guinea pigs didn't reach characteristic of weight and commercialization or for reproduction. For the results of increment of weight, nutritious conversion, production costs and access to the matters cousins, are recommended to use the diet of the treatment T6 (Balanced 3 + pastures and boil of the community) in the feeding of guinea pigs, in the rural sector of the Andean region of the Ecuador.
15
Gutierrez, Jenny Lourdes Mamani. "Evaluation of diets with different levels of barley sprouts (Hordeum vulgare) in the basic feed of guinea pigs (Cavia aperea porcellus) in the phases of growth." BYU ScholarsArchive, 2001. https://scholarsarchive.byu.edu/etd/5375.
Full textAbstract:
The study was done in the department of La Paz, providence of Ingavi in the community of Letanias (16° 39’ 15” S; 69° 60’ 18” W), in the Benson Institute building, located 3 kilometers from Viacha. The objectives were: to evaluate the growth and increase in weight and consumption of food in Guinea pig male and females under the effect of diets with different levels of barley sprout in the phases of growth; to determine the nutritional conversion; to determine the optimal level of use of the barley sprouts in the basic feeding of Guinea pigs; and to evaluate the results of the diets from the point of view of its economic efficiency. The diets utilized were isoprotein and isoenergetic and consisted of the following: D l (34% H. alfalfa + 33% P. barley + 33% bran), D-2 (45%H. alfalfa + 25% sprout + 14% P. barley + 16% bran), D-3 (35% H. alfalfa + 50% sprout + 12% P. barley + 3% bran), D-4 (22% H. alfalfa + 75% sprout + 2% P. barley + 1% bran). The design that I used was completely random with factorial arrangement, with four repetitions, taking into account 64 animals 32 male and 32 females. I analyzed the variables with the statistical package MSTATC obtaining the following results.- The analysis of variance obtained for the gaining and increasing of weight, I present differences in the phases of evaluation (sixth and eleventh week). Being D-2 the diet that presents greater weight with referring to the diets D l, D-2 and D-3. The consumption of food was greater in the diet D-2, showing greater flexibility than the diets D-2, D-3 and D-l. Analyzing the nutritional conversion index, weight, and economic relation it is concluded that the diet D-2 with 25% of barley sprout is the one that achieves the best behavior, achieving a good use of the goods that farmers have and the cost of feed is attainable for the producer. Barley sprouts can be an alternative feed for the guinea pig always as long as administered in low levels.
16
Van, der Baan Annelize. "The determination of digestibility of Atriplex nummularia cv. De Kock with different techniques." Diss., Pretoria : [s.n.], 2008. http://hdl.handle.net/2263/25996.
Full textAbstract:
The aim of the study was to determine the digestibility of Atriplex nummularia cv. De Kock, supplemented with three levels (15%, 30%, and 45%) of either maize or barley, using different in vitro techniques. An in vivo digestibility trial was conducted, together with a number of in vitro trials. An important development has been the introduction of biological methods (Jones&Theodorou, 2000). Three digestion techniques that simulate the digestion process are currently available to determine the nutritive value of ruminant feeds: - Digestion with rumen micro-organisms as in the work of Tilley&Terry (1963) or gas method (Menke et al., 1979). Digestion with faeces microorganisms (El Shaer et al., 1987), as an alternative to rumen fluid inoculum.
- Cellulase methods
- In situ incubations of samples in nylon bags in the rumen.
Dissertation (MSc(Agric))--University of Pretoria, 2009.
Animal and Wildlife Sciences
unrestricted
17
Matoka, Charles Mboya [Verfasser]. "Bacterial community responses to soil-injected liquid ammonium nutrition and effect of temperature on barley (Hordeum vulgare L.) grain yield formation / by Charles Mboya Matoka." Göttingen : Cuvillier, 2008. http://d-nb.info/988772698/34.
Full text
18
Soleimani, Behnaz [Verfasser]. "Genetic regulation of juvenile plant growth under contrasting levels of phosphorus, potassium and carbon dioxide nutrition in the wild barley introgression library S42IL / Behnaz Soleimani." Halle, 2018. http://d-nb.info/1162134348/34.
Full text
19
Ticona, Benique Eduardo. "Concentration of metabolites and behavior of live weight in llamas (Lama glama) fed with natural grass and barley during gestation, postpartum, and new born phases in Turco, department of Oruro." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/5438.
Full textAbstract:
The llama, a potential socioeconomic resource in the Bolivian highlands, faces serious nutritional deficiencies during the gestational and postpartum stages that negatively affect production. This study was conducted at the Tika Huta Experimental Center in the Llachu community of the Oruro prefecture. Our objectives were to determine metabolite concentration in blood plasma as well as live weight performance of pregnant and postpartum female llamas. Adult and juvenile llamas were fed diets of either plain natural grass or natural grass combined with 0.4 kg of barley hay. In addition, we determined metabolite concentrations in blood plasma and live weight performance of newborns until three months of age. Ten newborn llamas and nine pregnant adult llamas were used. We collected 133 blood plasma samples from mothers and 57 blood plasma samples from newborns. The samples were sent to laboratories at Brigham Young University for analysis. Results showed the following metabolite concentrations in pregnant llamas: 7.23 ± 1.80 g/dl total proteins, 36.31 ± 1.32 mg/dl urea, 84.72 ± 3.58 mg/dl triglycerides, 55.89 ± 2.32 mg/dl cholesterol, and 7.11 ± 1.34 mg/dl creatinine. In newborn llamas, blood plasma metabolite concentrations were as follows: 7.20 ± 1.54 g/dl total proteins, 48.41 ± 1.30 mg/dl urea, 103.25 ± 2.60 mg/dl triglycerides, 89.09 ± 3.30 mg/dl cholesterol, and 2.39 ± 0.33 mg/dl creatinine. The average live weights were 76.82 ± 8.57 kg and 15.95 ± 2.47 kg for mothers and newborns, respectively. Animals fed diets of natural grass and barley hay yielded results with significant differences. It is recommended that llama diets be supplemented with barley hay during the first two months of gestation, the last third of gestation, and postpartum.
20
Quant, Anthony David. "Standardized ileal digestible tryptophan to lysine ratios in growing pigs fed U.S.-type and non-U.S.-type feedstuffs." Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/973.
Full textAbstract:
Thesis (M.S.)--University of Kentucky, 2008.Title from document title page (viewed on February 2, 2009). Document formatted into pages; contains: ix, 146 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 138-145).
21
Capper, Brian Stephen. "Factors influencing the nutritive value of barley straw for ruminants." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238166.
Full text
22
McCann, M. E. E. "Studies on the nutritive value of barley for growing pigs." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390889.
Full text
23
Draw, Paul John. "Exogenous enzymes and irradiation of barley reduce the anti-nutritional activity of non-starch polysaccharides in broilers." Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-01302009-123908.
Full text
24
Drew, Paul John. "Exogenous enzymes and irradiation of barley reduce the anti-nutritional activity of non-starch polysaccharides in broilers." Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/25985.
Full textAbstract:
Interactions between non-starch polysaccharide (NSP) level, dietary lipid type, exogenous carbohydrase enzymes and irradiation were investigated. Ten treatment diets were fed to broilers in a performance and digestibility trial. Eight of the diets contained high levels of NSP, achieved by a high barley inclusion of 55% of the diet. Four of the treatments made use of non-irradiated barley, whereas the barley included in the other four diets was irradiated. By adding either 10% soya oil or yellow grease (fat) as the lipid source, sub groups were created which differed in fatty acid profile. Lastly, these treatments were further subdivided by supplementing one of the two diets from each subgroup with a commercially available combination of exogenous carbohydrase enzymes consisting of cellulases, xylanases and â - glucanases (Roxazyme G at 150 g/ton). The two control diets were based on maize (low NSP diets) with either soy oil or yellow grease. The high NSP diets had significantly lower (P<0.05) apparent metabolisable energy (AME) and lipid digestibility values than the low NSP diets. Lipid digestibility and AME values were also significantly lower (P<0.05) for diets containing yellow grease compared to soya oil. The birds that received yellow grease performed worse in terms of growth, feed intake and feed conversion ratio (FCR) than the oil-containing diets. These trends were evident throughout all treatments, although not always significant. The addition of carbohydrase to diets based on barley improved the dietary lipid digestibility and AME values. Significant improvements (P<0.05) in bird performance were noted for the barley diets with the yellow grease. Pre-irradiation of barley significantly increased (P<0.05) the AME value of diets, and improved lipid digestibility of the fat-containing treatment. The simultaneous combination of carbohydrase supplementation and barley irradiation proved to have an additive positive effect on feed quality and bird performance. For all treatments this combination improved the barley based diets to such an extent that it performed equally or significantly better (P<0.05) than its maize based counterpart. The irradiated barley-yellow grease based diets showed a more pronounced benefit with the addition of carbohydrase enzymes to the feed (P<0.05).Dissertation (MSc(Agric))--University of Pretoria, 2008.
Animal and Wildlife Sciences
unrestricted
25
Mayberry, Dianne. "Getting into the guts of a salty problem : poor animal production from saltbush pastures is due to inefficient rumen fermentation." University of Western Australia. School of Animal Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0071.
Full textAbstract:
The main hypothesis tested in this thesis was that poor animal production from saltbush pastures is due to the negative effects of high sodium chloride (NaCl) and potassium chloride (KCl) on the ruminal environment, and subsequent effects on microbial populations and products of rumen fermentation. This main hypothesis was tested in two experiments. In the first experiment (Chapter Four) the effects of saltbush and a formulated high-salt diet on the ruminal environment and microbial populations were measured over 24-hours following feeding. Feeding both the saltbush and high-salt diet increased the salinity of the rumen fluid, but the formulated high-salt diet caused a decrease in ruminal pH while the saltbush caused an increase. This resulted in differences in the composition of the ruminal microbial populations between the sheep fed different diets. In the second experiment (Chapter Five) the effects of saltbush and a formulated highsalt diet on rumen fermentation were measured. Sheep fed saltbush had inefficient rumen fermentation and this was only partially explained by the high salt content of the diet. Diets containing high levels of NaCl and KCl provided low levels of net energy to sheep, but sheep fed saltbush lost more energy as methane and faecal energy compared to sheep fed the formulated high-salt diet. Inefficient rumen fermentation could help to explain poor animal production from saltbush pastures. Energy supplements such as barley grain can improve the value of saltbush pastures as feed for sheep, but there is no information on how much supplement is required. A third experiment (Chapter Six) was designed to test the hypothesis that there would be an optimal amount of barley required to improve the efficiency of rumen fermentation in sheep fed saltbush. Barley and straw were combined in a pellet and substituted for saltbush at 0, 20, 40, 60, 80 and 100% of the maintenance ration. Feeding barley and straw improved the efficiency of rumen fermentation in sheep fed saltbush, with an optimal level of supplementation at 60% of the maintenance diet. This is likely to be lower (approximately 20% of maintenance) if barley is fed without straw.
26
Fard, Ebrahim Rowghani Haghighi. "Chemical and nutritional characteristics of whole-crop barley ensiled at different dry matter contents with or without silage additives." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307930.
Full text
27
Schmidt, Daiana. "Multi-method research strategy for understanding changes in barley grain protein composition and its relation to improved nutritional quality." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-30092015-113900/.
Full textAbstract:
Barley (Hordeum vulgare L.) is the fourth largest produced cereal worldwide. About two thirds of barley production is used to animal feed. When used to feed monogastric animals, the main shortcoming of barley grains is the deficiency of essential amino acids, especially lysine, threonine and methionine. The unbalanced amino acid composition is due to the main storage protein, the hordeins, which account for about 50% of total grain protein content. The nitrogen fertilization promotes C-hordein expression and accumulation, the hordein subgroup with the lowest content of essential amino acids, and the highest content of non-essential amino acids. Due to the importance of grain protein content and composition in the end use grain quality the key objective of the present study was to obtain a detailed insight into synthesis and accumulation of barley grain proteins and their relation to improved nutritional quality. An integrated proteomic and transcriptomic analysis have been undertaken in a set of transgenic antisense barley lines with the grain protein profile altered in comparison to the non-transgenic line cv. Golden Promise. The results were presented in three manuscripts in the thesis (chapters 2, 3 and 4). The first manuscript (chapter 2) reported a new grain protein extraction method combined with multi-method protein evaluation, including biochemical quantification, amino acid composition, sodium dodecyl-polyacrylamide gel electrophoresis (SDS-PAGE) couple with mass spectrometry (MS) identification and a gel free shotgun MS identification and relative quantification. The results showed the changeability of proteins between protein groups and the importance of choosing an adequate proteomic-based method for protein identification according to the complexity of protein mixtures. In the second manuscript (chapter 3) a differential protein profile of non-transgenic barley cv. Golden Promise and the transgenic antisense C-hordein barley lines was achieved by two-dimensional gel electrophoresis (2-DE) for salt soluble proteins and the differentially expressed proteins were identified by MS. The key results showed that the suppression of C-hordeins, the poor nutritional hordein subgroup, does not exclusively affects hordein synthesis and accumulation, and that the more balanced amino acid composition of these lines may be a consequence of distinct protein sources among different transgenic events, though a stable lysine-rich proteins upregulation occurs in all lines. In the third manuscript (chapter 4) the effects of nitrogen fertilization on hordein family at transcriptional and proteome level were assessed. The main results showed differential responses to N nutrition between non-transgenic and transgenic lines. In relation to C-hordein, specific C-hordein downregulation effect and in particular different responses to N were verified among subgroups of C-hordein multigene family in the transgenic line at transcriptional and proteomic level. In summary, the multi-method strategy used in the present work was successfully applied to obtain comprehensive information about barley grain proteins synthesis and accumulation and explain, at least in part, their relation to improved nutritional quality. These results can be useful in barley breeding programs aiming selective alterations of specific alleles/homologues to change amino acid composition by changing the relative proportions of the grain proteins in order to improve the barley grains nutritional quality.A cevada (Hordeum vulgare L.) é o quarto cereal mais produzido no mundo. Cerca de dois terços desta produção é utilizada na alimentação animal. A principal desvantagem dos grãos de cevada na alimentação de animais monogástricos é a deficiência de aminoácidos essenciais, principalmente lisina, treonina e metionina. Esta composição desfavorável ocorre devido à principal proteína de reserva dos grãos, as hordeínas, que representam cerca de 50% do teor total de proteína no grão. O nitrogênio promove a expressão e o acúmulo de C-hordeínas, o subgrupo com o menor teor de aminoácidos essenciais e o maior teor de aminoácidos não essenciais. Devido à importância do teor e composição de proteínas nos grãos na determinação de sua qualidade no uso final, o principal objetivo do presente trabalho foi obter uma visão detalhada sobre a síntese e acúmulo de proteínas de grãos de cevada e sua relação com a melhoria da qualidade nutricional. Análises proteômicas e transcriptômicas integradas foram realizadas em um conjunto de linhagens transgênicas de cevada com o perfil de proteínas de reserva alterados em comparação à linhagem não transgênica cv. Golden Promise. Os resultados foram apresentados na forma de três manuscritos (capítulos 2, 3 e 4). O primeiro (capítulo 2) descreveu um novo método de extração de proteínas dos grãos em combinação com métodos de estudo de proteínas diversos, incluindo a quantificação bioquímica, composição de aminoácidos, eletroforese em gel de poliacrilamida-dodecil sulfato de sódio (SDS-PAGE) seguido de identificação por espectrometria de massas (MS) e estratégia shotgun para identificação e quantificação relativa das proteínas. Os resultados mostram a mutabilidade das proteínas entre os diferentes grupos e a importância da escolha de um método adequado para a sua identificação de acordo com a complexidade das misturas proteicas. No segundo manuscrito (capítulo 3) o perfil proteico diferencial da linhagem não transgênica e transgênica foi obtido por eletroforese bidimensional (2-DE) para proteínas solúveis, e aquelas expressas diferencialmente foram identificadas por MS. Os resultados demonstram que a supressão das C-hordeínas não afeta exclusivamente a síntese e o acúmulo de hordeínas, e que a composição de aminoácidos mais equilibrada destas linhagens pode ser uma consequência de fontes de proteína distintas entre os diferentes eventos de transgenia, embora a regulação positiva de proteínas ricas em lisina foi estável. No terceiro manuscrito (capítulo 4) foram avaliados os efeitos da adubação nitrogenada sobre a família das hordeínas. Os resultados mostraram que as respostas foram diferentes entre as linhagens não transgênica e transgênica. Um efeito específico de supressão e respostas particulares foi verificado entre os subgrupos da família multigênica das C-hordeínas na linhagem transgênica. Em resumo, a estratégia de pesquisa multimétodo foi aplicada com sucesso na obtenção de informações abrangentes sobre a síntese e o acúmulo de proteínas nos grãos de cevada, e pelo menos em parte, explicou sua relação com a melhoria da qualidade nutricional. Esses resultados podem ser úteis em programas de melhoramento de cevada que visam alterações seletivas de alelos/homólogos específicos para alterar a composição de aminoácidos, através de mudanças nas proporções relativas das proteínas dos grãos.
28
Savage, Darryl B. "Nutritional influences on reproductive performance of beef cattle in the Barkly Tableland /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17977.pdf.
Full text
29
Alagón, Huallpa Gilbert. "USE OF BARLEY, WHEAT AND CORN DISTILLER'S DRIED GRAIN WITH SOLUBLES IN DIETS FOR GROWING RABBITS: NUTRITIVE VALUE, GROWTH PERFORMANCE AND MEAT QUALITY." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/27648.
Full textAbstract:
La producción mundial de biocombustibles denominados bioetanol y biodiesel se ha incrementado en la última década, como alternativa a los combustibles fósiles. Brasil produce etanol a partir de la caña de azúcar, EEUU a partir de maíz, mientras que en Europa y Canadá, el insumo más utilizado es el grano de trigo. En España las principales plantas de biocombustible utilizan maíz, trigo y cebada, para obtener etanol, básicamente.
Esta situación ha generado cambios importantes en el mercado mundial de granos, por un lado, encareciéndo el precio de las materias primas tradicionales y en consecuencia el coste de los piensos, y por otro lado, ofertando nuevas materias primas, tales como los denominados granos secos de destilería con solubles o DDGS (Dried Distillers Grains with Solubles), que pueden ser destinadas a la alimentación animal si son valoradas nutritivamente para las posibles especies animales de destino, entre las que podrían encontrarse los conejos.
Dado que los insumos y los procesos de producción industrial de bioetanol presentan algunas variaciones, la calidad de los DDGS generados varía consecuentemente en su composición química y su valor nutritivo, pero estas posibles fuentes de variación han sido poco estudiadas.
La cunicultura es una actividad productiva muy importante en Europa, especialmente en Francia, Italia, y España, cuyos costes de producción se han incrementado en especial en el rubro de la alimentación, que constituye entre el 50 a 70% del coste total, por las razones antes señaladas.Los DDGS se han incorporado en la dieta de vacuno, aves y cerdos, pero la información relativa a su utilización en conejos es muy escasa.
En este contexto, parece necesario evaluar el potencial nutritivo y el comportamiento productivo de los DDGS en piensos de conejos.Alagón Huallpa, G. (2013). USE OF BARLEY, WHEAT AND CORN DISTILLER'S DRIED GRAIN WITH SOLUBLES IN DIETS FOR GROWING RABBITS: NUTRITIVE VALUE, GROWTH PERFORMANCE AND MEAT QUALITY [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/27648
TESIS
30
Hosseini, Seyed Abdollah Verfasser], Nicolaus von [Akademischer Betreuer] [Wirén, Klaus [Akademischer Betreuer] Humbeck, and Thomas [Akademischer Betreuer] Schmülling. "Role of the potassium nutritional status on drought stress-induced leaf senescence in barley / Seyed Abdollah Hosseini. Betreuer: Nicolaus Wirén ; Klaus Humbeck ; Thomas Schmülling." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2015. http://d-nb.info/1075492874/34.
Full text
31
Bambrick, Hilary Jane, and Hilary Bambrick@anu edu au. "Child growth and Type 2 Diabetes Mellitus in a Queensland Aboriginal Community." The Australian National University. Faculty of Arts, 2003. http://thesis.anu.edu.au./public/adt-ANU20050905.121211.
Full textAbstract:
Globally, the prevalence of Type 2 diabetes is rising. The most affected populations are those that have undergone recent and rapid transition towards a Western lifestyle, characterised by energy-dense diets and physical inactivity.¶
Two major hypotheses have attempted to explain the variation in diabetes prevalence, both between and within populations, beyond the contributions made by adult lifestyle. The thrifty genotype hypothesis proposes that some populations are genetically well adapted to surviving in a subsistence environment, and are predisposed to develop diabetes when the dietary environment changes to one that is fat and carbohydrate rich. The programming hypothesis focuses on the developmental environment, particularly on prenatal and early postnatal conditions: nutritional deprivation in utero and early postnatal life, measured by low birthweight and disrupted child growth, is proposed to alter metabolism permanently so that risk of diabetes is increased with subsequent exposure to an energy-dense diet. Both hypotheses emphasise discord between adaptation (genetic or developmental) and current environment, and both now put forward insulin resistance as a likely mechanism for predisposition.¶
Diabetes contributes significantly to morbidity and mortality among Australia’s Indigenous population. Indigenous babies are more likely to be low birthweight, and typical patterns of child growth include periods of faltering and rapid catch-up. Although there have been numerous studies in other populations, the programming hypothesis has not previously been tested in an Australian Indigenous community. The framework of the programming hypothesis is thus expanded to consider exposure of whole populations to adverse prenatal and postnatal environments, and the influence this may have on diabetes prevalence.¶
The present study took place in Cherbourg, a large Aboriginal community in southeast Queensland with a high prevalence of diabetes. Study participants were adults with diagnosed diabetes and a random sample of adults who had never been diagnosed with diabetes. Data were collected on five current risk factors for diabetes (general and central obesity, blood pressure, age and family history), in addition to fasting blood glucose levels. A lifestyle survey was also conducted. Participants’ medical records detailing weight growth from birth to five years were analysed with regard to adult diabetes risk to determine whether childhood weight and rate of weight gain were associated with subsequent diabetes. Adult lifestyle factors were
xiialso explored to determine whether variation in nutrition and physical activity was related to level of diabetes risk.¶
Approximately 20% of adults in Cherbourg have diagnosed diabetes. Prevalence may be as high as 38.5% in females and 42% in males if those who are high-risk (abnormal fasting glucose and three additional factors) are included. Among those over 40 years, total prevalence is estimated to be 51% for females and 59% for males.¶
Patterns of early childhood growth may contribute to risk of diabetes among adults. In particular, relatively rapid weight growth to five years is associated with both general and central obesity among adult women. This lends some qualified support to the programming hypothesis as catch-up growth has previously been incorporated into the model; however, although the most consistent association was found among those who gained weight more rapidly, it was also found that risk is increased among children who are heavier at any age.¶
No consistent associations were found between intrauterine growth retardation (as determined by lower than median birthweight and higher than median weight growth velocity to one and three months) and diabetes risk among women or men. A larger study sample with greater statistical power may have yielded less ambiguous results.¶
Among adults, levels of physical activity may be more important than nutritional intake in moderating diabetes risk, although features of diet, such as high intake of simple carbohydrates, may contribute to risk in the community overall, especially in the context of physical inactivity. A genetic component is not ruled out. Two additional areas which require further investigation include stress and high rates of infection, both of which are highly relevant to the study community, and may contribute to the insulin resistance syndrome.¶
Some accepted thresholds indicating increased diabetes risk may not be appropriate in this population. Given the relationship between waist circumference and other diabetes risk factors and the propensity for central fat deposition among women even with low body mass index (BMI), it is recommended that the threshold where BMI is considered a risk be lowered by 5kg/m2 for women, while no such recommendation is made for men.¶
There are a number of social barriers to better community health, including attitudes to exercise and obesity, patterns of alcohol and tobacco use and consumption of fresh foods. Some of these barriers are exacerbated by gender roles and expectations.¶
32
Srichaikul, Korbua (Kristie). "Barley Protein-enriched Flour, Coronary Heart Disease and Cancer Risk." Thesis, 2010. http://hdl.handle.net/1807/25808.
Full textAbstract:
This thesis assessed whether advantages existed for animal (calcium caseinate) versus vegetable protein (barley protein-enriched flour) foods when fed at 30 g protein per day to 23 healthy hyperlipidemic subjects for 4 weeks in a randomized crossover study. Outcomes included serum lipids, serum markers of oxidative stress and the growth response of LNCaP prostate and MCF-7 breast cancer cells when incubated in vitro with individual subject’s study serum as an indication of whether the treatment promoted or inhibited cell growth. There was no treatment effect on blood lipids or biomarkers of oxidative stress nor was in vitro cell growth different between treatments. However, after pooling the two treatments, both MCF-7 and LNCaP cell growth was related positively to the change in oxidized LDL. MCF-7 growth was negatively related to the non-HDL-C: HDL-C ratio suggesting that raising intracellular cholesterol and reducing oxidative stress may have preventive and possibly therapeutic advantages.
33
Lonergan, Paul F. "Genetic characterisation and QTL mapping of zinc nutrition in barley (Hordeum vulgare) / Paul Francis Lonergan." 2001. http://hdl.handle.net/2440/21718.
Full textAbstract:
Includes bibliographical references (leaves 192-211).x, 211 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Maps major genes or quantitative trait loci associated with zinc nutrition in the vegetative and reproductive tissues of barley (Hordeum vulgare)
Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 2001
34
Long, Nigel R. "Characterisation and mapping of chromosome regions associated with improved growth and grain yield of barley on sandy soils of low fertility / by Nigel Richard Long." 2003. http://hdl.handle.net/2440/21993.
Full textAbstract:
"August, 2003"Includes bibliographical references (leaves 260-292)
v, 294 leaves : ill. (some col.), plates (col.), maps (col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, 2003
35
Long, Nigel R. "Characterisation and mapping of chromosome regions associated with improved growth and grain yield of barley on sandy soils of low fertility / by Nigel Richard Long." Thesis, 2003. http://hdl.handle.net/2440/21993.
Full textAbstract:
"August, 2003"Includes bibliographical references (leaves 260-292)
v, 294 leaves : ill. (some col.), plates (col.), maps (col.) ; 30 cm.
Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, 2003
36
Ramesh, Sunita A. "Molecular mechanism of zinc uptake and regulation in cereals / Sunita Ramesh." 2002. http://hdl.handle.net/2440/21811.
Full textAbstract:
Bibliography: leaves 174-204.xiii, 204 leaves : ill. (some col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
"This work provides a starting point for understanding the molecular mechanisms of zinc uptake and the regulation of zinc transport in cereals. Zinc efficient cereals would yield more on soild with low zinc and could potentially result in increased zinc content grain."
Thesis (Ph.D.)--University of Adelaide, Dept. of Horticulture, Viticulture and Oenology, 2002?
37
Ramesh, Sunita A. "Molecular mechanism of zinc uptake and regulation in cereals / Sunita Ramesh." Thesis, 2002. http://hdl.handle.net/2440/21811.
Full textAbstract:
Bibliography: leaves 174-204.xiii, 204 leaves : ill. (some col.) ; 30 cm.
"This work provides a starting point for understanding the molecular mechanisms of zinc uptake and the regulation of zinc transport in cereals. Zinc efficient cereals would yield more on soild with low zinc and could potentially result in increased zinc content grain."
Thesis (Ph.D.)--University of Adelaide, Dept. of Horticulture, Viticulture and Oenology, 2002?
38
Balkos, Konstantine Dino. "Optimization of Nitrogen Acquisition, and Metabolism, by Potassium in Rice, and Barley." Thesis, 2009. http://hdl.handle.net/1807/18163.
Full textAbstract:
We present the first characterization of K+ optimization of N uptake and metabolism in an NH4+-tolerant species, tropical lowland rice (cv. IR-72). 13N radiotracing showed that increased K+ supply reduces futile NH4+ cycling at the plasma membrane, diminishing the excessive rates of both unidirectional influx and efflux. Pharmacological testing showed that low-affinity NH4+ influx may be mediated by both K+ and non-selective cation channels. Suppression of NH4+ influx by K+ occurred within minutes of increasing K+ supply. Increased K+ reduced free [NH4+] in roots and shoots by 50-75%. Plant biomass was maximized on 10 mM NH4+ and 5 mM K+, with growth 160% higher than 10 mM NO3--grown plants, and 220% higher than plants grown at 10 mM NH4+ and 0.1 mM K+. Unlike in NH4+-sensitive barley, growth optimization was not attributed to a reduced energy cost of futile NH4+ cycling at the plasma membrane. Activities of the key enzymes glutamine synthetase (GS) and phosphoenolpyruvate carboxylase (PEPC) were strongly stimulated by elevated K+, mirroring plant growth and protein content. Improved plant performance through optimization of K+ and NH4+ is likely to be of substantial agronomic significance in the world’s foremost crop species.
39
Szczerba, Mark. "Physiology of Potassium Nutrition in Cereals: Fluxes, Compartmentation, and Ionic Interactions." Thesis, 2008. http://hdl.handle.net/1807/11267.
Full textAbstract:
Potassium (K+) is an essential nutrient and the most abundant cation in plant cells. Plants possess two transport systems for K+ acquisition: a high-affinity system (HATS), operating at external K+ concentrations ([K+]ext) below 1 mM, and showing reduced transport activity in the presence of ammonium (NH4+); and, a low-affinity system (LATS), operating at [K+]ext above 1 mM, that is not affected by NH4+. K+ transport and compartmentation were investigated in barley (Hordeum vulgare L.) and rice (Oryza sativa L.) using the non-invasive technique of compartmental analysis by tracer efflux (CATE), to simultaneously determine unidirectional membrane fluxes, ion concentrations, and exchange characteristics in subcellular compartments. These studies revealed striking differences in unidirectional K+ fluxes between HATS and LATS. It was found that flux measurements, using traditional direct influx (DI) protocols, accurately represented HATS influx, but underestimated LATS influx by as much as seven-fold. In both barley and rice, LATS K+ fluxes were found to undergo rapid, futile cycling, with the ratio of efflux:influx 3 to 5 times greater, and the cytosolic exchange rate 2 to 3 times faster than under HATS. Based upon plasma-membrane electrical potential measurements, efflux was found to be active under LATS conditions. LATS-mediated conditions for K+ were found to provide relief from NH4+ toxicity in barley by immediately reducing NH4+ influx by more than 50%, and significantly reducing NH4+ futile cycling. Employing the K+ channel inhibitors cesium, lanthanum, and tetraethylammonium, NH4+ was shown to have both K+-sensitive and –insensitive influx pathways at high [NH4+]ext. Based on current models of flux energetics, the combined uptake of K+ and NH4+ was found to utilize 60% of root oxygen consumption. Barley and rice both showed signs of NH4+ toxicity at low [K+]ext, but rice recovered at much lower [K+]ext, suggesting a crucial role of K+ in the NH4+-tolerance of rice. These experiments address fundamental aspects of K+ fluxes, and help provide a physiological framework for future studies of K+ transport and mineral nutrition.
40
Zarrinkalam, Mohammad-Reza. "Application of a " Glucose Release Index " to assess physical and chemical characteristics of cereal grains that may influence starch digestion and subsequent energy supply to monogastrics." 2002. http://hdl.handle.net/2440/37826.
Full textAbstract:
In the pig and poultry production industries, energy forms the largest and the greatest cost pressure when a diet is formulated. In Australia, cereal grains such as barley, sorghum, and wheat are the main dietary energy sources, comprising more than 60 % of the diet in many cases. Traditionally, during diet formulation, the energy value of a grain has been represented by a single figure for that particular grain type. However, several studies have indicated that the energy availability from different grains fed to pigs and poultry varies significantly even within one grain cultivar. Given these findings, the use of a single value to represent the energy of each grain type during diet formulation, can lead to inefficient utilisation of dietary resources by animals, and thus decreased animal performance and consequently, a decrease in profit for the pig and poultry production industries. Thus, there is an opportunity to develop a rapid and reproducible in vitro assay to accurately assess the available energy values and nutritional quality of each grain type. In order to develop such an assay, further understanding of factors that affect the available energy values of grains need to be explored. Starch, which is hydrolysed into glucose by animals, is the most abundant energy component in cereal grains, and there is evidence suggesting that variations in digestible or metabolisable energy values may be related to the extent of starch digestibility. For example in poultry, variations in the in vitro digestibility of starch between several wheat cultivars have been shown to correlate with their in vivo available metabolisable energy values. However, it is not known to what extent starch digestibility varies between cultivars of other grain types such as barley and sorghum. There is an increasing body of evidence suggesting that differences in the physical and chemical properties of cereal grains may play an important role in influencing starch digestibility and, consequently, animal performance. Thus, the general hypothesis of this study was that starch digestibility varies between barley, sorghum and wheat, and between cultivars within grain types and this is related to specific chemical and physical characteristics of the grains. To examine this, the following issues were investigated using 18 barley, 15 sorghum and 10 wheat cultivars : 1 ) an in vitro glucose release index ( GRI ) assay was developed to assess starch digestibility within and between the cereal grain types and, 2 ) the GRI was correlated to both starch - related ( e.g., starch content, starch granule size, the amylose to amylopectin ratio, starch gelatinisation properties ) and non - starch - related ( e.g., non - starch polysaccharide composition, kernel hardness, the presence of protein matrix and milling quality ) physical / chemical characteristics within and between the cereal grains. Results revealed significant variations in the GRI both between grains and within a given grain type. The GRI values ranged between 27 - 45 %, 25 - 54 % and 32 - 53 % in barley, sorghum and wheat respectively. Correlation analysis revealed that the GRI in barley, sorghum and wheat was influenced by the physical and chemical characteristics of starch - and non - starch - related grain properties, although the type of characteristic influencing GRI was specific to the grain type. In barley, the ratio of amylose to amylopectin, starch gelatinisation and kernel hardness influenced the GRI. In sorghum, the GRI was influenced by the ratio of amylose to amylopectin, the presence of a protein matrix surrounding starch granules and kernel hardness. Finally in wheat, the presence of protein matrix and milling quality influenced the GRI. It was also shown that the extract viscosity of grains within barley and wheat, but not sorghum, varied significantly. In conclusion, the results from this study indicate that ; 1 ) the GRI assay may be used to identify some factors that affect in vivo starch digestibility within and between barley, sorghum and wheat, 2 ) starch digestibility ( as assessed by the GRI ) may be influenced by some physical and chemical characteristics of cereal grains, and that these characteristics are specific to the type of grain The physical and chemical characteristics that may influence starch digestion will be discussed in relation to their potential physiological effects on energy digestion, and utilisation in animals. The information generated will provide a basis for future studies that will ultimately assist in the design of in vitro assays to predict energy availability from barley, sorghum and wheat grains fed to pigs and poultry, and contribute to the more efficient use of grains in monogastric production systems.Thesis (Ph.D.)--Department of Animal Science, 2002.
41
Zarrinkalam, Mohammad-Reza. "Application of a " Glucose Release Index " to assess physical and chemical characteristics of cereal grains that may influence starch digestion and subsequent energy supply to monogastrics." Thesis, 2002. http://hdl.handle.net/2440/37826.
Full textAbstract:
In the pig and poultry production industries, energy forms the largest and the greatest cost pressure when a diet is formulated. In Australia, cereal grains such as barley, sorghum, and wheat are the main dietary energy sources, comprising more than 60 % of the diet in many cases. Traditionally, during diet formulation, the energy value of a grain has been represented by a single figure for that particular grain type. However, several studies have indicated that the energy availability from different grains fed to pigs and poultry varies significantly even within one grain cultivar. Given these findings, the use of a single value to represent the energy of each grain type during diet formulation, can lead to inefficient utilisation of dietary resources by animals, and thus decreased animal performance and consequently, a decrease in profit for the pig and poultry production industries.
Thus, there is an opportunity to develop a rapid and reproducible in vitro assay to accurately assess the available energy values and nutritional quality of each grain type. In order to develop such an assay, further understanding of factors that affect the available energy values of grains need to be explored.
Starch, which is hydrolysed into glucose by animals, is the most abundant energy component in cereal grains, and there is evidence suggesting that variations in digestible or metabolisable energy values may be related to the extent of starch digestibility. For example in poultry, variations in the in vitro digestibility of starch between several wheat cultivars have been shown to correlate with their in vivo available metabolisable energy values. However, it is not known to what extent starch digestibility varies between cultivars of other grain types such as barley and sorghum.
There is an increasing body of evidence suggesting that differences in the physical and chemical properties of cereal grains may play an important role in influencing starch digestibility and, consequently, animal performance. Thus, the general hypothesis of this study was that starch digestibility varies between barley, sorghum and wheat, and between cultivars within grain types and this is related to specific chemical and physical characteristics of the grains. To examine this, the following issues were investigated using 18 barley, 15 sorghum and 10 wheat cultivars : 1 ) an in vitro glucose release index ( GRI ) assay was developed to assess starch digestibility within and between the cereal grain types and, 2 ) the GRI was correlated to both starch - related ( e.g., starch content, starch granule size, the amylose to amylopectin ratio, starch gelatinisation properties ) and non - starch - related ( e.g., non - starch polysaccharide composition, kernel hardness, the presence of protein matrix and milling quality ) physical / chemical characteristics within and between the cereal grains.
Results revealed significant variations in the GRI both between grains and within a given grain type. The GRI values ranged between 27 - 45 %, 25 - 54 % and 32 - 53 % in barley, sorghum and wheat respectively. Correlation analysis revealed that the GRI in barley, sorghum and wheat was influenced by the physical and chemical characteristics of starch - and non - starch - related grain properties, although the type of characteristic influencing GRI was specific to the grain type. In barley, the ratio of amylose to amylopectin, starch gelatinisation and kernel hardness influenced the GRI. In sorghum, the GRI was influenced by the ratio of amylose to amylopectin, the presence of a protein matrix surrounding starch granules and kernel hardness. Finally in wheat, the presence of protein matrix and milling quality influenced the GRI. It was also shown that the extract viscosity of grains within barley and wheat, but not sorghum, varied significantly.
In conclusion, the results from this study indicate that ; 1 ) the GRI assay may be used to identify some factors that affect in vivo starch digestibility within and between barley, sorghum and wheat, 2 ) starch digestibility ( as assessed by the GRI ) may be influenced by some physical and chemical characteristics of cereal grains, and that these characteristics are specific to the type of grain
The physical and chemical characteristics that may influence starch digestion will be discussed in relation to their potential physiological effects on energy digestion, and utilisation in animals. The information generated will provide a basis for future studies that will ultimately assist in the design of in vitro assays to predict energy availability from barley, sorghum and wheat grains fed to pigs and poultry, and contribute to the more efficient use of grains in monogastric production systems.Thesis (Ph.D.)--Department of Animal Science, 2002.
42
Holloway, R. E. (Robert Edgcumbe). "Zinc as a subsoil nutrient for cereals." 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phh7454.pdf.
Full textAbstract:
Bibliography: leaves 290-324. This thesis investigates two avenues suggested by Graham and Ascher (1993) for approaching the problems of subsoil infertility, with particular reference to zinc. Field experiments with wheat and barley were established at Minnipa, on Eyre Peninsula in South Australia to investigate the effects of applying nutrients (principally zinc, nitrogen and phosphorus) to the subsoil to a depth of 0.4 m with a modified deep ripper. A deep pot experiment was designed to measure the zinc efficiencies (in terms of dry matter production) of a range of species grown in siliceous sand. The effects of added zinc on root growth were compared. A pot experiment was also designed to measure the effects of zinc placement in the soil on the zinc concentrations and uptake in Excalibur, particularly with respect to concentrations in grain.
43
Holloway, R. E. (Robert Edgcumbe). "Zinc as a subsoil nutrient for cereals / by R.E. Holloway." Thesis, 1996. http://hdl.handle.net/2440/18920.
Full textAbstract:
Bibliography: leaves 290-324.xxii, 324 leaves, [5] leaves of plates : col. ill. ; 30 cm.
This thesis investigates two avenues suggested by Graham and Ascher (1993) for approaching the problems of subsoil infertility, with particular reference to zinc. Field experiments with wheat and barley were established at Minnipa, on Eyre Peninsula in South Australia to investigate the effects of applying nutrients (principally zinc, nitrogen and phosphorus) to the subsoil to a depth of 0.4 m with a modified deep ripper. A deep pot experiment was designed to measure the zinc efficiencies (in terms of dry matter production) of a range of species grown in siliceous sand. The effects of added zinc on root growth were compared. A pot experiment was also designed to measure the effects of zinc placement in the soil on the zinc concentrations and uptake in Excalibur, particularly with respect to concentrations in grain.
Thesis (Ph.D.)--University of Adelaide, Dept. of Agronomy and Farming Systems, 1997
44
Grace, Emily Jane. "Functional characterisation of phosphorus uptake pathways in a non-responsive arbuscular mycorrhizal host." 2008. http://hdl.handle.net/2440/58644.
Full textAbstract:
AM plants acquire Pi via two pathways; the direct uptake pathway via plant roots and the AM pathway via external fungal hyphae and colonised cortical cells. It has been assumed that these two pathways are additive and therefore in non-responsive plants the AM pathway is often considered to be non-functional. However, data from ³²P uptake studies indicates that the AM pathway is functional in many non-responsive symbioses and in some instances supplies the majority of plant P. In recent years the high-affinity Pi transporters involved in both direct and AM Pi uptake pathways have been identified. They are expressed at the root epidermis and the symbiotic interface of colonised cortical cells and respond to the P and AM status of the plant. The overall objective of the work described in this thesis was to characterise Pi uptake via the AM pathway in barley, a non-responsive AM host, using an approach which integrated physiological measurements of plant responsiveness and AM contribution with investigations of gene expression and functional characterisation of the plant Pi transporters. A preliminary survey of field-grown barley demonstrated the persistence of AM colonisation under commercial cropping regimes in southern Australia and highlighted the relevance of AM studies to commercial agriculture. Under glasshouse conditions AM colonisation of barley induced depressions in growth and P uptake compared to NM controls. Growth depressions were unrelated to percent colonisation by two AM fungal species and could not readily be explained by fungal C demand; the strong correlation between growth and P content suggested that P was the limiting factor in these experiments. However, a compartmented pot system incorporating ³²P-labelling demonstrated that the AM pathway is functional in colonised barley and, in the interaction with G. intraradices, contributed 48% of total P. This suggested that P flux via the direct uptake pathway is decreased in AM barley. The expression of three Pi transporters, HvPT1, HvPT2 and HvPT8 was investigated in colonised roots. HvPT1 and HvPT2 have previously been localised to the root epidermis and root hairs and are involved in Pi uptake via the direct pathway whilst HvPT8 is an AM-inducible Pi transporter which was localised by in-situ hybridisation to colonised cortical cells. Using promoter::GFP gene fusions the localisation of HvPT8 to arbuscule-containing cortical cells was confirmed in living roots from transgenic barley. Quantitative real-time PCR analysis of the expression of these three Pi transporters indicated that HvPT1 and HvPT2 were expressed constantly, under all conditions regardless of AM colonisation status and indicated that decreased P flux via the direct pathway is not related to expression of these transporters. HvPT8 was induced in AM colonised roots. However, the level of expression was not related to flux via the AM pathway or arbuscular colonisation. The HvPT8 transporter was further characterised by constitutive over-expression in transgenic barley. ³²P uptake assays in excised roots demonstrated increased Pi uptake from low P solution compared to wild-type roots and confirmed that HvPT8 is a functional Pi transporter with high-affinity transport properties. This is the first report of characterisation of an AM-inducible Pi transporter in planta. When these transgenic plants were grown in solution culture there was no increase in growth or P uptake relative to wild-type or transgenic controls and growth in soil and AM colonisation were also unaffected in these transgenic lines. The data presented in this thesis highlights the importance of combined physiological and molecular approaches to characterising plant AM interactions. The persistence of AM colonisation in barley in the field indicates the importance of improving our understanding of symbiotic function in non-responsive plants. Future efforts should be directed towards understanding the signals which regulate P flux via both the direct and AM pathways with the ultimate aim of enhancing AM responsiveness of non-responsive species. Making the direct and AM pathways additive in nonresponsive species should be a key aim of future research.http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1313311
Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, 2008
45
Grace, Emily Jane. "Functional characterisation of phosphorus uptake pathways in a non-responsive arbuscular mycorrhizal host." Thesis, 2008. http://hdl.handle.net/2440/58644.
Full textAbstract:
AM plants acquire Pi via two pathways; the direct uptake pathway via plant roots and the AM pathway via external fungal hyphae and colonised cortical cells. It has been assumed that these
two pathways are additive and therefore in non-responsive plants the AM pathway is often considered to be non-functional. However, data from ³²P uptake studies indicates that the AM
pathway is functional in many non-responsive symbioses and in some instances supplies the majority of plant P. In recent years the high-affinity Pi transporters involved in both direct and AM Pi uptake pathways have been identified. They are expressed at the root epidermis and the symbiotic interface of colonised cortical cells and respond to the P and AM status of the plant. The overall objective of the work described in this thesis was to characterise Pi uptake via the AM pathway in barley, a non-responsive AM host, using an approach which integrated physiological measurements of plant responsiveness and AM contribution with investigations of gene expression and functional characterisation of the plant Pi transporters.
A preliminary survey of field-grown barley demonstrated the persistence of AM colonisation under commercial cropping regimes in southern Australia and highlighted the relevance of AM studies to commercial agriculture. Under glasshouse conditions AM colonisation of barley induced depressions in growth and P uptake compared to NM controls. Growth depressions were unrelated to percent colonisation by two AM fungal species and could not readily be explained by fungal C demand; the strong correlation between growth and P content suggested that P was the limiting factor in these experiments. However, a compartmented pot system incorporating ³²P-labelling demonstrated that the AM pathway is functional in colonised barley and, in the interaction with G. intraradices, contributed 48% of total P. This suggested that P flux via the direct uptake pathway is decreased in AM barley.
The expression of three Pi transporters, HvPT1, HvPT2 and HvPT8 was investigated in colonised roots. HvPT1 and HvPT2 have previously been localised to the root epidermis and root hairs and are involved in Pi uptake via the direct pathway whilst HvPT8 is an AM-inducible Pi transporter which was localised by in-situ hybridisation to colonised cortical cells. Using promoter::GFP gene fusions the localisation of HvPT8 to arbuscule-containing cortical cells was confirmed in living roots from transgenic barley. Quantitative real-time PCR analysis of the expression of these three Pi transporters indicated that HvPT1 and HvPT2 were expressed constantly, under all conditions regardless of AM colonisation status and indicated that decreased P flux via the direct pathway is not related to expression of these transporters. HvPT8 was induced in AM colonised roots. However, the level of expression was not related to flux via the AM pathway or arbuscular colonisation.
The HvPT8 transporter was further characterised by constitutive over-expression in transgenic barley. ³²P uptake assays in excised roots demonstrated increased Pi uptake from low P solution compared to wild-type roots and confirmed that HvPT8 is a functional Pi transporter with high-affinity transport properties. This is the first report of characterisation of an AM-inducible Pi transporter in planta. When these transgenic plants were grown in solution culture there was no increase in growth or P uptake relative to wild-type or transgenic controls and growth in soil and AM colonisation were also unaffected in these transgenic lines.
The data presented in this thesis highlights the importance of combined physiological and molecular approaches to characterising plant AM interactions. The persistence of AM colonisation in barley in the field indicates the importance of improving our understanding of symbiotic function in non-responsive plants. Future efforts should be directed towards understanding the signals which regulate P flux via both the direct and AM pathways with the ultimate aim of enhancing AM responsiveness of non-responsive species. Making the direct and AM pathways additive in nonresponsive species should be a key aim of future research.Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, 2008
46
"The use of enzyme supplementation for wheat-barley diets in poultry as a means of improving productive performance." Thesis, 2010. http://hdl.handle.net/10413/2169.
Full textAbstract:
The objective of the study was to evaluate the effect of an exogenous multi-blend enzyme ( -glucanase and xylanase) on the performance of the broiler chickens and laying hens fed diets based on wheat and barley. Experiments were conducted on a flock of broilers and two flocks of laying hens. In both cases feed and water were provided ad libitum. The enzyme effect of enzyme addition on the broiler performance involved 2080 day-old male and female chicks in 48 pens, allocated one of four dietary treatments (0, 50, 100 or 200g/ton enzyme supplementation), to 35 days of age. On day 35, ten birds from each treatment were sacrificed for the analysis of the digestive organs weight (gizzards and livers). The trial was divided into two phases: a starter (1 to 21 d) and grower (22 to 35 d). Feed consumption was measured weekly and birds were also weighed weekly. The investigation of enzyme effect in laying hen diets involved 896 birds for each specific period. Each replicate consisted of four cages (four birds per cage) with a common feeder; 16 hens/pen of 56 pens. Eggs were weighed three times a week, feed consumption weekly and birds every weeks. The addition of a multi-blend enzyme significantly improve body weight, body weight gain, food intake, and feed conversion ratio for both sexes (P<0.05) in broiler chickens. There was a significant improvement in egg production in laying hens (P<0.05). Egg weight and egg mass were not significantly improved. Wheat and barley have cell wall components (arabinoxylans and -glucans respectively) which have a negative effect on the nutritive value of these feeds and therefore performance in poultry fed diets based on these ingredients. Addition of an exogenous multi-blend enzyme( -glucanase and xylanase) could help reduce these effects and improve performance and digestibility values in poultry. The null hypothesis was there will be no difference between supplemented and un-supplemented diets based on wheat and barley in performance of poultry. The results of this study suggest that the inclusion of 50 g/ton enzyme helps improve poultry performance, especially in young birds.Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2010.
47
Neskar, Michael Frank. "Effects of enzyme supplementation on the nutritional value of barley in chicken diets." 1988. http://hdl.handle.net/1993/16756.
Full text
48
Johnson, Ntinya C. "The nutritive value of pearled deoxynivalenol (DON)-contaminated barley (Hordeum vulgare L.) for swine." 2006. http://hdl.handle.net/1993/20760.
Full text
49
Boyd, Lindsey. "Effects of heat treatments on the safety and nutritional properties of whole grain barley." 2016. http://hdl.handle.net/1993/31020.
Full textAbstract:
Health claims for barley β-glucan (BG) have prompted the development of more food products using barley. Some new products do not use any form of heat treatment which could become an issue as barley has been found to have high microbial contamination. The aim of this research was to evaluate current commercial barley products for microbial and BG quality and determine the effects of different heat treatments on the safety and physicochemical properties of BG of whole grain barley. Three heat treatments (micronization, roasting and conditioning) were performed on 3 cultivars of barley (CDC Rattan, CDC McGwire and CDC Fibar). The microbial quality was measured with standard plate count (SPC), yeast and mould (MYC), and coliforms/E. coli. Only 4 of the 17 commercial barley products tested met acceptable microbial limits used in this study. All 3 heat treatments reduced SPC, MYC and coliforms to acceptable levels. BG was extracted using an in vitro digestion method to determine its viscosity, molecular weight (MW) and solubility. Heat-treated barley increased the BG viscosity and MW compared to the untreated barley. The effect of heat treatment on starch pasting, particle size and colour were also evaluated. Overall, heat treatments improved the safety and potential health benefits of whole grain barley.February 2016
50
Kalinga, Danusha Nilakshi. "Delivering β-glucan via selected bakery systems : cake." Thesis, 2010. https://vuir.vu.edu.au/15799/.
Full textAbstract:
In the western world intake of dietary fibre is low and fat consumption is high. This leads to many diet related diseases, such as, type 2 diabetes, colorectal cancer and cardiovascular disease. Fibre enrichment and fat replacement are effective ways in developing a health-promoting diet. β-glucan, a soluble dietary fibre present in cereal grains, has many health benefits, which include reduction in blood cholesterol and, improving insulin response. Due to its viscosity enhancing and water binding properties, β-glucan is considered as a potential fat replacer. In this thesis β-glucan from oat and barley were studied as functional ingredients in bakery systems using cake as a model to deliver health benefits.