Letteratura scientifica selezionata sul tema "Cocksfoot"
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Articoli di riviste sul tema "Cocksfoot"
1
Brown, K. R., e C. Lill. "Cocksfoot". NZGA: Research and Practice Series 5 (1 gennaio 1990): 56–57. http://dx.doi.org/10.33584/rps.5.1998.3332.
Testo completoAbstract (sommario):
Around 1000 ha of cocksfoot seed are entered for certification each year. Average seed yields are 250 kg ha" for Grasslands Kara and 400 kg ha- for Grasslands Wana, but specialist growers can achieve at least another 100 kg ha-'. In the case of Wana cocksfoot yields of 700 kg ha" have been recorded.. Most of the cocksfoot seed crops in New Zealand are in the Methven area.
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TORRANCE, LESLEY, A. T. JONES e G. H. DUNCAN. "Properties of cocksfoot streak and cocksfoot cryptic, two viruses infecting cocksfoot (Dactylis glomerata) in Scotland". Annals of Applied Biology 124, n. 2 (aprile 1994): 267–81. http://dx.doi.org/10.1111/j.1744-7348.1994.tb04133.x.
Testo completo
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TORRANCE, LESLEY, A. T. JONES e G. H. DUNCAN. "Properties of cocksfoot streak and cocksfoot cryptic, two viruses infecting cocksfoot (Dactylis glomerate) in Scotland". Annals of Applied Biology 124, n. 3 (giugno 1994): 579–93. http://dx.doi.org/10.1111/j.1744-7348.1994.tb04162.x.
Testo completo
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Avery, A. L., D. L. Michalk, R. P. Thompson, P. Ball, T. Prance, C. A. Harris, D. W. FitzGerald, J. F. Ayres e B. A. Orchard. "Effects of sheep grazing management on cocksfoot herbage mass and persistence in temperate environments". Australian Journal of Experimental Agriculture 40, n. 2 (2000): 185. http://dx.doi.org/10.1071/ea98008.
Testo completoAbstract (sommario):
Cocksfoot (Dactylis glomerata L.) is among the most important perennial grass species sown in temperate Australia. Newly sown cocksfoot pastures were established on 5 commercial farms (sites), in the temperate high-rainfall (>600 mm annual rainfall) zone of eastern Australia. Experiments were located on these commercial farms, and were measured from September 1993 to August 1996, to compare the effect of seasonal sheep grazing management strategies with continuous grazing (control treatment) on cocksfoot herbage mass and plant frequencies. Each experiment had 8 common grazing treatments and up to 5 local treatments, with 2 replicates and 2 years of start for treatments. Cocksfoot herbage mass under continuous grazing declined at 2 sites, remained stable at 2 sites and increased at 1 site. No single grazing strategy had a significant linear (time) effect on cocksfoot herbage mass across sites and at the completion of monitoring in 1996 there were few treatments with a significant increase in fitted values for cocksfoot herbage mass compared to the continuously grazed control. Under moderate grazing pressure (8–10 dry sheep equivalents) cocksfoot pastures appeared to be relatively stable and unresponsive to grazing management and therefore continuous grazing seems to be appropriate. High grazing pressure in summer (herbage mass below 1000 kg/ha) can reduce cocksfoot persistence and in drought stock should be removed from cocksfoot pastures. Summer seasonal closure increased cocksfoot frequency at all sites, except Four Mile Creek and Dundee. These studies have shown it is possible to improve cocksfoot herbage mass through the implementation of strategic grazing practices, particularly over summer and early autumn.
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Ridley, AM, e SM Windsor. "Persistence and tolerance to soil acidity of phalaris and cocksfoot in north-eastern Victoria". Australian Journal of Experimental Agriculture 32, n. 8 (1992): 1069. http://dx.doi.org/10.1071/ea9921069.
Testo completoAbstract (sommario):
Persistence of Phalaris aquatica L. cv. Sirosa (phalaris) and Dactylis glomerata cv. Porto (cocksfoot) was evaluated for 5 pH treatments at 2 field sites on acidic soils. At one site (Beechworth) the soil was strongly acidic [pH(CaCl2) 14.21 to depth (80 cm) and contained concentrations of CaCl2-extractable aluminium (Al) >11 �g/g. At the other site (Lake Rowan) the soil pH (0-10 cm) was 5.0 and A1 concentrations were 4 �g/g. At Beechworth, lime incorporated at 5.5 t/ha improved establishment of phalaris but plant density declined, and by 30 months after sowing, phalaris plant densities were similar to treatments receiving no lime. Establishment of cocksfoot was less affected by lime application than phalaris, and plant densities were similar to those of phalaris by 26 months after sowing. However, there were no differences between pasture species where no lime was applied. Considerable re-establishment of cocksfoot seedlings occurred regardless of soil treatment. Despite the reported relative sensitivity of phalaris to Al in solution culture experiments, at Beechworth phalaris had more root development at depth than cocksfoot or annual pasture. Although concentrations of Al in the subsoil were high, the perennial deep root system of phalaris may give it an advantage over cocksfoot in terms of survival over summer. A larger root system at depth may give phalaris greater potential than cocksfoot for reducing nitrate leaching and soil acidification. On less acidic soils at the Lake Rowan site, lime application did not affect establishment of either phalaris or cocksfoot. Phalaris had greater persistence than cocksfoot at Lake Rowan. Dry summer conditions at Lake Rowan were the likely cause of poor persistence of cocksfoot. More drought-tolerant cocksfoot cultivars are required if this species is to be a useful perennial grass for pastures in ley cropping areas of Victoria and southern New South Wales.
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Yang, Mei, Minguo Liu, Jiaoyun Lu e Huimin Yang. "Effects of shading on the growth and leaf photosynthetic characteristics of three forages in an apple orchard on the Loess Plateau of eastern Gansu, China". PeerJ 7 (29 agosto 2019): e7594. http://dx.doi.org/10.7717/peerj.7594.
Testo completoAbstract (sommario):
Background Inclusion of forage into the orchard is of great help in promoting the use efficiency of resources, while shading from trees restricts forage growth and production in the Loess Plateau of China. This study was aimed to investigate how tree shading affected leaf trait, photosynthetic gas exchange and chlorophyll feature of forages under the tree in the orchard-forage system. Methods The shading treatments were set as partially cutting branches (reduced shading), normal fruit tree shading (normal shading) and normal tree shading plus sun-shading net (enhanced shading) in an apple orchard. Leaf trait, photosynthesis, chlorophyll component and fluorescence related parameters were measured with lucerne (Medicago sativa), white clover (Trifolium repens) and cocksfoot (Dactylis glomerata) which were sown under apple trees. Results Shading imposed significant impacts on the growth and leaf photosynthetic characteristics, while there were differences among species. Enhanced shading decreased leaf thickness, leaf dry matter content (LDMC) and leaf mass per unit area (LMA). Biomass accumulation decreased with enhanced shading in cocksfoot, but did not change in white clover and lucerne which had much lower biomass accumulation than cocksfoot. Enhanced shading reduced net photosynthetic rate (Pn) of white clover and lucerne, but rarely affected cocksfoot, while it decreased instantaneous water use efficiency (WUEi) of cocksfoot but had few effects on the other forages. Enhanced shading reduced leaf dark respiration rate (Rd), light compensation point (LCP) and maximum assimilation rate. The Rd and LCP of cocksfoot were much lower than those of white clover and lucerne. Chlorophyll contents and chlorophyll a/b changed little with shading. Cocksfoot had the highest contents but lowest ratio. Maximum photochemical rate of photosystem II increased and non-photochemical quenching decreased with enhanced shading in cocksfoot, while did not change in the other forages. Discussion Leaf trait, photosynthetic gas exchange and chlorophyll feature were variously affected by species, shading and their interaction. Cocksfoot was more efficient than the other two forages in use of weakened light and more tolerant to tree shading. In the apple orchard, we recommend that reducing the density of apple tree or partially cutting branches together with selecting some shading-tolerant forages, i.e., cocksfoot, would be a practical option for the orchard-forage system in the Loess Plateau of China.
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Brock, J. L., D. E. Hume e R. H. Fletcher. "Seasonal variation in the morphology of perennial ryegrass (Lolium perenne) and cocksfoot (Dactylis glomerata) plants and populations in pastures under intensive sheep grazing". Journal of Agricultural Science 126, n. 1 (febbraio 1996): 37–51. http://dx.doi.org/10.1017/s0021859600088791.
Testo completoAbstract (sommario):
SUMMARYThe morphology of independent plants of ‘Grasslands Ruanui’ perennial ryegrass (Lolium perenne L.) and three cultivars of cocksfoot (Dactylis glomerata L.) (‘Grasslands Apanui’, ‘Grasslands Kara’ and ‘Grasslands Wana’) in mixed pastures under intensive sheep grazing was studied at Palmerston North, New Zealand during 1991/92.Both perennial ryegrass and cocksfoot exhibited a similar pattern of clonal growth and population structure. Distribution of plants among various orders of branching showed a relatively stable pattern through most of the year except in spring, when stem decay and plant fragmentation exceeded apical growth and regeneration, causing an increase in the proportion of small plants and a corresponding decrease of larger plants. This pattern was similar to that previously reported for white clover (Trifolium repens L.). Nevertheless, seasonal variation in plant structure (number of leaves, tillers and stems per plant) was small, but variation in organ size (DW or length) was greater. Stolon formation through elongation of internodes occurred throughout the year, but was associated primarily with flowering.Grazing management caused no differences in plant structure between species or among the cocksfoot cultivars, but did affect the size of organs, and hence plants. Cocksfoot plants were 50–60% heavier than perennial ryegrass under rotational grazing. Under set stocking, only perennial ryegrass and Wana cocksfoot exhibited sufficient phenotypic plasticity to survive, both Kara and Apanui cocksfoot failed to persist. The only consistent difference between the species was greater flowering in perennial ryegrass than in cocksfoot, in both the proportion of plants flowering, and the number of flowering tillers per plant. Both species produced stolons throughout the year, although perennial ryegrass and Wana cocksfoot had a higher proportion of plants with stolons than Apanui and Kara cocksfoot. Length and DW of stolons per plant were similar in both species.As there was little variation in plant structure and plant density, length of stolons per unit area tended to parallel seasonal changes in pasture tiller density. The role of grazing management in the survival of tillers and plants, and subsequent performance of grass species in pastures is discussed.
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Ridley, AM, e RJ Simpson. "Seasonal development of roots under perennial and annual grass pastures". Australian Journal of Agricultural Research 45, n. 5 (1994): 1077. http://dx.doi.org/10.1071/ar9941077.
Testo completoAbstract (sommario):
Studies in the field and in a rhizotron were conducted to examine the root growth of Phalaris aquatica L. (phalaris), Dactylis glomerata L. (cocksfoot) and Lolium rigidum Gaudin (annual ryegrass). Root and tiller development of the perennial grasses in autumn was also studied. In the field, annual ryegrass developed a more extensive surface rooting system than phalaris and cocksfoot by spring in a favourable season. Early root development of annual ryegrass was poor where the first rains of the season did not occur until winter. Growth rates of annual ryegrass roots at depth were similar to phalaris in mid spring in the rhizotron. Phalaris had a higher proportion of live roots than cocksfoot prior to the first autumn rain. Cocksfoot did not regenerate a substantial new root system until it developed secondary tillers, about a month after initial rains. Collectively, these studies indicated that the seasonal development and extent of the root systems of cocksfoot and phalaris were different.
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Morris, N. J., M. C. Smith, A. M. Mills, M. R. Mcneill e D. J. Moot. "Insect populations of six dryland pastures grown in Canterbury". Journal of New Zealand Grasslands 78 (1 gennaio 2016): 109–16. http://dx.doi.org/10.33584/jnzg.2016.78.527.
Testo completoAbstract (sommario):
The 9 year 'MaxClover' experiment at Lincoln University concluded that ryegrass and white clover pastures were less persistent than cocksfoot and lucerne under dryland conditions in Canterbury. Measurements of insect pests commenced in Year 5 in response to a measured decline in sown ryegrass and white clover. The aim was to determine if there were differences in insect pressure among the different pastures. Insect pest pressure was present in all pastures from when measurements commenced until the experiment finished in Year 9. Grass grub larvae were the main pest that contributed to the decline in sown species, particularly in ryegrass/white clover, and they were found in all grass-based pasture treatments. Larval populations reached 156/m2 in August 2008 in the cocksfoot/balansa clover and cocksfoot/white clover pastures. Argentine stem weevil overwintering adult populations reached 63/m2 in July 2010 and were highest in cocksfoot/Subterranean clover pastures. These may have contributed to the slow decline in cocksfoot. Low populations (
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Lewis, T. R., R. J. Lucas, R. W. Hofmann e D. J. Moot. "Tolerance of newly sown cocksfoot-clover pastures to the herbicide imazethapyr". Journal of New Zealand Grasslands 79 (1 gennaio 2017): 173–80. http://dx.doi.org/10.33584/jnzg.2017.79.552.
Testo completoAbstract (sommario):
In New Zealand, subterranean clover is recommended as a companion legume in mixed swards, particularly in dryland cocksfoot-based pastures. However, establishment of cocksfoot is slower than perennial ryegrass and therefore weed ingress is more common. An experiment at Lincoln University, Canterbury showed imazethapyr applied when clover was at the 3-4 trifoliate leaf stage, and cocksfoot at the 2+ leaf stage, increased the subterranean clover content of the pastures by at least 1000 kg DM/ha, despite initial visual phytotoxicity responses. Balansa and white clover pasture yields were not different to their unsprayed unweeded controls. Imazethapyr application controlled broadleaf weeds from early in the season. The herbicide application reduced cocksfoot yields by 70% in early spring, but yields recovered and were not different to the unsprayed unweeded controls at 1350 ± 260 kg DM/ha after grazing. Imazethapyr application improved subterranean clover pastures through an increase in clover content by suppressing weeds and temporarily reducing the rate of cocksfoot growth. Keywords: subterranean clover, Spinnaker herbicide, seedling, white clover, balansa clover
Tesi sul tema "Cocksfoot"
1
Mills, Annamaria. "Understanding constraints to cocksfoot (Dactylis glomerata L.) based pasture production". Phd thesis, Lincoln University. Agriculture and Life Sciences Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20070717.161658/.
Testo completoAbstract (sommario):
This research examined the mechanisms by which temperature, water availability and nitrogen (N) affect the dry matter (DM) yield potential of cocksfoot (Dactylis glomerata L.) dominant pastures. The experiment was a split plot design with main plots of fully irrigated (I) or dryland (D), sub-plots of N fertiliser at 800 kg N/ha in 2003/04; and 1600 kg N/ha in 2004/05 (+N) or 0 kg N/ha (-N). The potential environmental yield of an established 8 year old cocksfoot dominant pasture was 21.9 t DM/ha/y from I+N pastures compared with 9.8 t DM/ha by I-N pastures and 15.1 t DM/ha/y by D+N pastures. The lowest yields were from dryland pastures with no N which produced 7.5 t DM/ha/y in 2003/03 and 5.0 t DM/ha/y in 2004/05.
The effect of seasonal temperatures on the DM production, when periods of water stress were excluded, was quantified using thermal time accumulated above a base temperature of 3°C as 7.0 kg DM/°Cd/ha for N fertilised pastures and 3.3 kg DM/°Cd/ha for pastures with no N.
The 2.5 t DM/ha difference in yields of D-N pastures in 2003/04 and 2004/05 was the result of the duration, extent and timing of the water stress period. In both years the critical limiting deficit (DL) was calculated as 78 mm from the soil moisture deficit in the 0-0.8 m soil layers. Beyond DL yield decreased at a rate of 1.45%/mm in +N and N pastures, relative to fully irrigated control pastures.
Yields of D+N and D-N pastures were similar during periods of water stress with 0.4±0.1 t/DM/ha produced during the rotation ending 30/12/2003. This was less than from either the I-N (1.2 t DM/ha) or I+N (3.5 t DM/ha) pastures due to the reduction in the amount of photosynthetically active radiation intercepted by the canopies of the dryland pastures. However, in the rotation ending 2/5/2004, after autumn rain alleviated drought conditions, yield of the D+N pasture was 2.1 t DM/ha compared with 1.7 t DM/ha by I+N pastures.
The effect of N on yield was described using a nutrition index which showed that as DM yield increased N% in the herbage declined. This is a function of the ratio between metabolic and structural N requirements rather than caused by ontogeny alone. Specific leaf N was determined at two harvests and appeared constant at a given point in time (1.0-1.6 g N/m² leaf). In contrast, specific pseudostem N increased from 0.8-1.0 g N/m² pseudostem at an NNI of 0.4 in N pastures to 2.6-3.0 g N/m² pseudostem at an NNI of 1.2 in the +N pastures.
Differences between the yields of +N and N pastures were caused by differences in radiation use efficiency (RUE) as determined by the linear relationship (R²=0.76) between RUE and the nitrogen nutrition index (NNI).
In this thesis, empirical relationships for the effects of temperature, water availability and N were derived and the physiological mechanisms which underlie these descriptions were identified. These relationships provide clear and simple explanations of the effects of environmental variables on the productivity of cocksfoot based pastures which will enhance understanding of the benefits and limitations of cocksfoot, particularly in dryland farming systems.
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Tilvikienė, Vita. "Management of tall fescue, cocksfoot and reed canary grass swards for biogas, biomass quality and energy value". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121115_154219-00563.
Testo completoAbstract (sommario):
Research objective
The study was designed to investigate biomass production of tall fescue, cocksfoot, and reed canary grass and the quality of raw material for biogas as influenced by sward fertilization with different rates of nitrogen and different number of cuts per season and to establish the effect of fertilization with digestate on cocksfoot biomass production and quality.
Research tasks:
• to estimate the productivity of tall fescue, cocksfoot and reed canary grass, fertilized with different nitrogen rates, for biogas;
• to assess the effect of cutting frequency and fertilization rate of tall fescue, cocksfoot and reed canary grass on the quality composition of biomass for biogas and biogas potential;
• to estimate agroecological value of perennial grasses;
• to determine the energy potential of biomass of the tested perennial grasses used for biogas production and to identify the energy balance of raw material preparation for biogas.
Research subject - tall fescue (Festuca arundinacea Schreb.), cocksfoot (Dactylis glomerata L.), reed canary grass (Phalaris arundinacea L.).
Originality of the research work. One of the potential raw materials for biogas production is biomass of perennial grasses. Each grass species differs in growth rhythm and rate, demand for nutrients, and other characteristics, therefore the amount of biomass is highly dependent on specific growing conditions and cultivation technologies that have to ensure the quality of raw material best suited... [to full text]Tyrimo tikslas – ištirti nendrinių eraičinų, paprastųjų šunažolių ir nendrinių dryžučių biomasės kiekį bei žaliavos biodujoms kokybę pagal skirtingas azoto normas tręštuose žolynuose, taikant nevienodą pjūčių skaičių per sezoną ir nustatyti tręšimo biosubstratu įtaką paprastųjų šunažolių biomasės kiekiui bei kokybei. Tyrimo uždaviniai: • įvertinti biodujoms auginamų nendrinių eraičinų, paprastųjų šunažolių ir nendrinių dryžučių produktyvumą, juos tręšiant skirtingomis azoto normomis; • nustatyti nendrinių eraičinų, paprastųjų šunažolių ir nendrinių dryžučių pjūčių dažnumo ir tręšimo azotu įtaką biomasės biodujoms kokybinei sudėčiai bei dujų potencialui; • nustatyti tirtų daugiamečių žolių auginimo agroekologinę vertę; • įvertinti biomasės naudojimo biodujų gamybai energinį potencialą ir žaliavos paruošimo biodujoms energijos balansą. Tyrimo objektas – nendrinis eraičinas (Festuca arundinacea Schreb.), paprastoji šunažolė (Dactylis glomerata L.), nendrinis dryžutis (Phalaris arundinacea L.) Mokslinis naujumas. Viena iš potencialių žaliavų biodujų gamybai yra daugiamečių žolių biomasė. Tačiau kiekviena žolių rūšis nuo kitų skiriasi savitu augimo ritmu, trukme, maisto medžiagų poreikiu ir kitomis savybėmis, todėl biomasės kiekis labai priklauso nuo konkrečių augimo sąlygų ir auginimo technologijų, o kokybė turėtų būti tokia, kad būtų tinkamiausia pagal numatomą žaliavos panaudojimo paskirtį. Šio tyrimo metu nustatyta, kad vidutinių platumų klimato zonos šiaurinėje dalyje... [toliau žr. visą tekstą]
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Tikwayo, Sizwe Edward. "The biomass production, nutrient content and silage quality of Perennial ryegrass (Lolium perenne (L)) Cocksfoot (Dactylis glomerata (L)) and Tall fescue (Festuca arundinacea (Schreb)) varieties grown under irrigation in Alice, South Africa". Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/1796.
Testo completoAbstract (sommario):
The study aims to evaluate the biomass production and nutrient content and silage quality of perennial ryegrass (Lolium perenne (L)), cocksfoot (Dactylis glomerata (L)) and tall fescue (Festuca arundinacea (Schreb)). Six varieties were used, two for each species. A completely randomized block designed replicated three times was conducted at University of Fort Hare Research Farm during 2014-2015 growing season. The plots were harvested at four-week interval (post emergency) for one year. Biomass yields were measured for fresh forage and dry matter yield. Duplicated samples were then dried, milled and analyzed for chemical and mineral composition (CP, NDF, ADF, and ash, Ca, P, K, Na, Mn, Cu, Zn and Fe) for only winter season. In addition the grasses were ensiled and the silage was analyzed for its fermentation parameters and nutrient content (lactic acid, pH, DM, CP, NDF, ADF, and ash, Ca, P, K, Na, Mn, Cu, Zn and Fe). Biomass results showed significant differences (P < 0.05) between season and varieties. On average Tall fescue varieties Jessup (13741.67 FM kg/ha), Alix (12007.78 FM kg/ ha) and Ryegrass varieties Samson (11597.22 FM kg/ha) and Nui (10591.67 FM kg/ha) had the highest fresh biomass yield. Similarly, Tall fescue varieties Jessup (2833.06 DM kg/ha) and Alix (2708.3 DM kg/ ha) and Ryegrass varieties Samson (2169.44 DM kg/ha) and Nui (2169.67 kg/ha) had the highest dry biomass yield. Throughout the year the average biomass yield was significantly different among species (P< 0.05). During summer and autumn Tall fescue varieties Jessup and Alix gave the highest dry matter yields of 3855.5 to 1977.8 DM kg/ha, and 3877.8 to 1900 DM kg/ha, respectively, and followed by Cocksfoot 2400 DM kg/ha. Ryegrass had the highest dry matter biomass yield in winter (2975 DM kg/ha) and the least in summer (977.75 DM kg/ha). There were no significant (P>0.05) differences on the chemical composition (CP, NDF, ADF, and ash) and mineral composition (Ca, P, K, Na, Mn, Cu, Zn and Fe) of the six varieties. The grass silage results showed significant differences (P< 0.05) among the six varieties for moisture content. Perennial ryegrass variety Nui (66.76 percent) had low moisture content than the other grass silages. The different varieties had no significant effects (P>0.05) on chemical composition (CP, NDF, ADF, and ash) and mineral composition (Ca, P, K, Na, Mn, Cu, Zn and Fe). It is concluded that the biomass production of the six varieties of three grass species was different throughout the year under irrigation hence Ryegrass and Tall fescue are recommended for dairy farmers in the region for all seasons. It can be concluded that there is no difference with respect to fermentation characteristics and nutrient content among the varieties of the grass species.
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Ates, Serkan. "Grazing management of subterranean clover (Trifolium subterraneum L.) in South Island (New Zealand)". Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1338.
Testo completoAbstract (sommario):
This study consisted of two sheep grazed dryland pasture experiments. Experiment l compared sheep production from 3-year-old cocksfoot based pastures grown in combination with white, Caucasian, subterranean or balansa clover with a ryegrass-white clover pasture and a pure lucerne forage. Sheep liveweight gain per head from each pasture treatment and the pure lucerne stand was recorded in the 2006/07 and 2007/08 seasons. The cocksfoot-subterranean clover pasture provided equal (381 kg LW/ha in 2006) or higher (476 kg LW/ha in 2007) animal production in spring and gave the highest total animal production (646 kg LW/ha) averaged across years of the five grass based pastures. However, total annual liveweight production from lucerne was higher than any grass based pasture mainly due to superior animal production during summer when lucerne provided 42-85% higher animal production than any of the grass based pastures. In Experiment 2, the effect of stocking rate (8.3 (low) and 13.9 (high) ewes + twin lambs/ha) and time of closing in spring on lamb liveweight gain, pasture production and subterranean clover seedling populations was monitored over 2 years for a dryland cocksfoot-subterranean clover and ryegrass-subterranean clover pasture in Canterbury. In both years, twin lambs grew faster (g/head/d) in spring at low (327; 385) than high (253; 285) stocking rate but total liveweight gain/ha (kg/ha/d) was greater at high (7.26; 7.91) than low (5.43; 6.38) stocking rate. Ewes also gained 0.5 and 1.5 kg/head at the low stocking rate in 2006 and 2007 respectively but lost 0.2 kg/head in 2006 and gained 0.3 kg/head at high stocking rate in 2007. Mean subterranean clover seedling populations (per m²) measured in autumn after grazing treatments in the first spring were similar at both low (2850) and high (2500) stocking rate but declined with later closing dates in spring (3850, 2950, 2100 and 1700 at 2, 4, 6, 8 weeks after first visible flower). Seedling populations measured in autumn after grazing treatments in the second spring were also unaffected by stocking rate (low 1290, high 1190) but declined with later closing dates in spring (1470, 1320 and 940 at 3, 5 and 8 weeks after first flowering, respectively). The effect of stocking rate and closing dates in spring on pasture and clover production in the following autumn was similar to the effects on seedling numbers in both years. However, clover production in the following spring was unaffected by stocking rate or closing date in the previous year at the relatively high seedling populations generated by the treatments. This was presumably due to runner growth compensating for lower plant populations in pastures that were closed later in spring. Subterranean clover runner growth in spring may not compensate in a similar manner if seedling numbers in autumn fall below 500/m². Mean annual dry matter production from cocksfoot and ryegrass pastures grown with and without annual clovers pasture production ranged from 6.4 to 12.4 t DM/ha/y but stocking rate (8.3 vs. 13.9 ewes/ha) during spring did not affect annual pasture production. Pastures overdrilled with annual clovers yielded 23-45% more dry matter production than pastures grown without annual clovers. The study confirms the important role of subterranean clover in improving pasture production and liveweight gains of sheep in dryland cocksfoot and ryegrass pastures. Lowering stocking rate from 13.9 to 8.3 ewes/ha was a less effective method of increasing seed production of subterranean clover in dryland pastures although it did lead to increased liveweight gain per head.
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Muraki, Tomohiro. "Effects of alternative grass species on grazing preference of sheep for white clover". Diss., Lincoln University, 2008. http://hdl.handle.net/10182/1095.
Testo completoAbstract (sommario):
Despite the importance of a high white clover (Trifolium repens) content in temperate pastoral systems in terms of livestock performance and nitrogen fixation, the proportion of white clover in grass-clover pastures is often low (<20%). This thesis examined in two experiments whether the white clover content of pastures could be improved by sowing white clover with alternative grass species to diploid perennial ryegrass (Lolium perenne L.). In a pasture experiment, DM production, pasture composition and morphology of grass-clover mixtures was measured over the establishment year (January 2007 to January 2008) where white clover was sown in fine mixtures with diploid perennial ryegrass, tetraploid perennial ryegrass, timothy (Phleum pratense L.) and cocksfoot (Dactylis glomerata L.). Pastures were irrigated and rotationally grazed with on-off grazing with Coopworth ewe hoggets. Total annual DM production of pasture was more than 20% higher in tetraploid (12521 kg DM ha⁻¹) and diploid (11733 kg DM ha⁻¹) perennial ryegrass than timothy (9751 kg DM ha⁻¹) and cocksfoot (9654 kg DM ha⁻¹). However, timothy (5936 kg DM ha⁻¹) and cocksfoot (5311 kg DM ha⁻¹) had more than four times higher white clover annual DM production than tetraploid (1310 kg DM ha⁻¹) and diploid (818 kg DM ha⁻¹) ryegrass. Pasture growth rate at the first three harvests in autumn was significantly greater in tetraploid and diploid ryegrass than timothy and cocksfoot. Timothy and cocksfoot had a higher proportion of white clover than tetraploid and diploid perennial ryegrass throughout the entire year. This was due to more and larger white clover plants in timothy and cocksfoot plots. In a grazing preference experiment, the partial preference of sheep for white clover offered in combination with the same grass species as in the pasture experiment was measured in five grazing tests in May, September, October, November and December 2007. Pastures were sown in January 2007. Paired plots (grass and clover both 4.2 m x 10 m) were grazed by three Coopworth ewe hoggets between 9am and 5pm, and preference was recorded by decline in pasture mass and visual scan sampling for grazing time. Grazing preference for clover was generally low throughout these tests (e.g. average apparent DM intake from clover = 47%; average grazing time from clover = 44%). Several explanations are proposed for this low preference including a high N content and intake rate of the grass relative to the clover. No significant differences were found among the grass treatments in total grass grazing time, total clover grazing time, ruminating time, the proportion of grazing time on clover, selective coefficient for clover and DM intake percentage from clover at any date. There was no significant change in overall sward surface height (SSH) decline among grass treatments throughout all the tests except December 2007 when the overall SSH decline for cocksfoot was significantly lower than the other species. The study indicated that the rapid growth rate of perennial ryegrass in the early phase of pasture establishment, rather than differences in partial preference, was the key factor limiting white clover content in the mixed swards relative to cocksfoot and timothy pastures. It is concluded that high clover-containing pastures capable of delivering high per head performance can be established through the use of slow establishing pasture species such as timothy and cocksfoot.
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Tonmukayakul, Nop. "Water use efficiency of six dryland pastures in Canterbury". Lincoln University, 2009. http://hdl.handle.net/10182/1498.
Testo completoAbstract (sommario):
The annual and seasonal water use efficiency of six pasture combinations were calculated from the ‘MaxClover’ Grazing Experiment at Lincoln University. Pastures have been established for six years and are grazed by best management practices for each combination. Measurements for this study are from individual plots of four replicates of ryegrass (RG)/white clover (Wc), cocksfoot (CF)/Wc; CF/balansa (Bal) clover; CF/Caucasian (Cc) clover; CF/subterranean (Sub) clover or lucerne. Water extraction measurements showed soils for all dryland pastures had a similar plant available water content of 280±19.8 mm. Dry matter measurements of yield, botanical composition and herbage quality were assessed from 1 July 2008 until 30 June 2009. Lucerne had the highest annual yield of 14260 kg DM/ha/y followed by the CF/Sub at 9390 kg DM/ha/y and the other grass based pastures at ≤ 6900 kg DM/ha/y. All pastures used about 670±24.4 mm/y of water for growth. Lucerne had the highest annual water use efficiency (WUE) of 21 kg DM/ha/mm/y of water used (total yield/total WU). The WUE of CF/Sub was the second highest at 15 kg DM/ha/mm/y, and the lowest was CF/Wc at 9 kg DM/ha/mm/y. The CF/Sub pastures had the highest total legume content of all grass based pastures at 21% and as a consequence had the highest annual nitrogen yield of 190 kg N/ha. This was lower than the monoculture of lucerne (470 kg N/ha). Ryegrass/white clover had the highest total weed component in all pastures of 61%. For dryland farmers spring is vital for animal production when soil temperatures are rising and moisture levels are high. The water use efficiency at this time is important to maximize pasture production. In spring lucerne produced 8730 kg DM/ha, which was the highest dry matter yield of all pastures. The CF/Sub produced the second highest yield of 6100 kg/DM/ha. When calculated against thermal time, CF/Sub grew 5.9 kg DM/ºCd compared with lucerne at 4.9 kg DM/ºCd. The higher DM yield from lucerne was from an extra 400 ºCd of growth. The highest seasonal WUE of all pastures occurred in the spring growing period. Linear regressions forced through the origin, showed lucerne (1/7/08-4/12/08) had a WUE of 30 kg DM/ha/mm (R2=0.98). Of the grass based pastures, CF/Sub produced 18 kg DM/ha/mm (R2=0.98) from 1/7 to 10/11/08 from 270 mm of water used. The lowest spring WUE was 13.5 kg DM/ha/mm by CF/Bal pastures which was comparable to the 14.3±1.42 kg DM/ha/mm WUE of CF/Wc, CF/Cc and RG/Wc pastures. During the spring, CF/Sub clover had the highest spring legume component of the grass based pastures at 42% and produced 120 kg N/ha. This was lower than the 288 kg N/ha from the monoculture of lucerne. Sub clover was the most successful clover which persisted with the cocksfoot. Based on the results from this study dryland farmers should be encouraged to maximize the potential of lucerne on farm, use cocksfoot as the main grass species for persistence, rather than perennial ryegrass, and use subterranean clover as the main legume species in cocksfoot based pastures. By increasing the proportion of legume grown the water use efficiency of a pasture can be improved. When pastures are nitrogen deficient the use of inorganic nitrogen may also improve pasture yields particularly in spring.
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Nguyen, TM. "Morphological responses of cocksfoot (Dactylis glomerata L.) and tall fescue (Lolium arundinaceum Schreb.) to waterlogging stress". Thesis, 2022. https://eprints.utas.edu.au/45620/1/Nguyen_whole_thesis.pdf.
Testo completoAbstract (sommario):
Waterlogging is a seasonal constraint on low-lying cropping and pasture lands in temperate regions of south-eastern Australia during winter. It has been attributed to yield loss in both crops and pastures. The tolerance level of plants to waterlogging relates to physiological, biochemical, morphological and anatomical adaptive traits. Understanding the likely response and adaptive characteristics of particular pasture species and cultivar to waterlogging can assist in choosing appropriate cultivars for waterlogging prone areas. In this study, we investigated morphological responses of cocksfoot (Dactylis glomerata L.) and tall fescue (Lolium arundinaceum Schreb., syn. Festuca arundinacea Schreb.) grass plants under waterlogging conditions. The aims of this study were: i) to examine the morphological responses of two temperate perennial grass species: tall fescue and cocksfoot under waterlogging conditions; ii) to determine which mechanisms are involved in plant adaptation to waterlogged conditions.
Two separate pot experiments were conducted at Tasmanian Institute of Agriculture, Mt. Pleasant Laboratory, Launceston, Tasmania, Australia. The first experiment was conducted from April until October 2019 on four cultivars of tall fescue (two winter active cultivars of Mediterranean origin: cv. Resolute and cv. Temora and two summer active cultivars of Continental origin, cv. Hummer and cv. Quantum II MaxP); and four cultivars of cocksfoot (two winter active cultivars of Mediterranean, cv. Kasbah and cv. Uplands and two summer active cultivars of Continental, cv. Lazuly and cv. Porto). The 14-week-old plants were subjected to waterlogging or control conditions for 4 weeks, followed by a 4-week recovery period.
The second experiment was conducted from May to August 2020 on two summer active cultivars of Continental origin of tall fescue, cv. Hummer and cv. Quantum II MaxP; and two summer active cultivars of Continental origin of cocksfoot, cv. Lazuly and cv. Porto. The 6-week-old plants were subjected to four periods of waterlogging treatments: 7, 14, 21 and 28 days. Measured above ground parameters included plant height, number of live tillers, leaf chlorophyll content (measured by Soil Plant Analysis Development (SPAD) reading) and shoot dry matter; and below ground included root length, number of adventitious roots, the formation of aerenchyma in adventitious roots and root dry matter.
Results showed that waterlogging did not affect shoot dry matter of both grass species in both experiments but did significantly affect the development of root system. Cocksfoot appeared to be more sensitive to waterlogging than tall fescue, which was indicated in most of the variables measured such as plant height, leaf chlorophyll content (measured by SPAD reading), root length and root dry matter. Waterlogging significantly induced the formation of adventitious roots and aerenchyma in the roots of all cultivars. However, aerenchyma formed significantly faster and to a greater extent in waterlogged tall fescue plants (cv. Hummer and cv. Quantum II MaxP), compared to waterlogged cocksfoot plants (cv. Lazuly and cv. Porto). The formation of aerenchyma in adventitious roots is a possible mechanism that aided tall fescue plants overcome waterlogging stress on root length development, whereas root length of all cocksfoot cultivars (cv. Lazuly, cv. Porto, cv. Uplands and cv. Kasbah) was significantly impeded by waterlogging. Hence, the proportion of aerenchyma formed in adventitious roots appeared to be the major contributor to root survival and growth under waterlogging conditions. However, waterlogging significantly caused the reduction in root dry matter of all cultivars of tall fescue and cocksfoot examined in the second experiment, most likely attributed to younger age of plants when waterlogging was started. Further investigations on aerenchyma formation in primary roots would be interesting to assess whether the loss of primary roots under waterlogging is related to capacity for aerenchyma formation in these roots of cocksfoot and tall fescue plants.
Results of this study did not show any significant differences between the two origin types (Mediterranean and Continental types) of each species in their response to waterlogging. Therefore, it is likely that differences in response of these grasses to waterlogging depend on adaptive characteristics of individual cultivar rather than origin of the breeding material per se. Results of the first experiment showed that the Mediterranean cocksfoot cv. Kasbah, was the most sensitive cultivar to 4 weeks waterlogging in all measured variables, whereas cv. Uplands, also a Mediterranean cocksfoot cultivar, showed better tolerance to waterlogging. A variation in waterlogging responses among cultivars suggests the need for further investigation to elucidate differences in physiological and morphological mechanisms of waterlogging tolerance (e.g. aerenchyma and adventitious roots) among cultivars and pre-breeding material within species, which could then be used in grass breeding programs.
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Stevenson, K. "Optimising grass seeding rates for improved establishment of perennial legumes in cocksfoot (Dactylis glomerata) swards". Thesis, 2018. https://eprints.utas.edu.au/29129/1/Stevenson_whole_thesis.pdf.
Testo completoAbstract (sommario):
The effect of grass seeding rate on legume establishment was investigated in the low rainfall region of the Tasmanian midlands. Three clover species, Caucasian clover, Talish clover and red clover were paired with one of two cocksfoot species, summer active cocksfoot or winter active cocksfoot, at three different grass seeding rates 1 kg/ha, 3 kg/ha and 5 kg/ha. Successful establishment was defined as the maintenance of a clover proportion of 20-45% in the sward, and was determined using plant number. Successful establishment of all three clover species was achieved for the 5 month duration of the experiment. Clover proportions within the recommended range were recorded when Talish clover or Caucasian clover was sown with either cocksfoot species at the grass seeding rate of 3 kg/ha. The same result was achieved when red clover was paired with either cocksfoot species at the grass seeding rate of 5 kg/ha. Sowing treatments that contained red clover produced a significantly (P<0.05) greater biomass, than sowing treatments that contained Talish clover or Caucasian clover. The results of a parallel experiment conducted in a glasshouse at the University of Tasmania, highlighted several key differences between the species in morphology and development rate. A faster rate of leaf emergence, larger leaf area and larger shoot length were observed on cocksfoot seedlings than observed on Talish clover and Caucasian clover seedlings. Red clover seedling were observed to develop secondary stems, this contributed to their greater biomass production and improved performance relative to that of the other clover species. Issues of poor establishment previously reported for slow growing clover species, such as Caucasian clover and Talish clover, were overcome by pairing these species with cocksfoot at a lowered grass seeding rate.
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Mills, A. "Understanding constraints to cocksfoot (Dactylis glomerata L.) based pasture production : a thesis submitted for a degree of Doctor of Philosophy at Lincoln University, New Zealand /". Diss., 2007. http://hdl.handle.net/10182/32.
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Turner, LR. "Investigating the physiology and management of cocksfoot (Dactylis glomerata L.) and prairie grass (Bromus willdenowii Kunth.) as alternative perennial grass species for the dairy industry in southern Australia". Thesis, 2006. https://eprints.utas.edu.au/22184/1/whole_TurnerLydiaRuth2006_thesis.pdf.
Testo completoAbstract (sommario):
This thesis examined the productivity and pasture herbage quality of cocksfoot (Dactylis glomerata L.) cv. 'Kara' and prairie grass (Bromus willdenowii Kunth.) cv. 'Matua', under leaf stage based defoliation management. Leaf stage (number of live leaves per tiller) is a generic measure of plant development and was used to investigate the physiology underlying the regrowth response of these species following defoliation, and to determine optimal defoliation management of cocksfoot and prairie grass plants.
A survey was undertaken of Tasmanian dairy farmers, to establish the current and potential use of perennial ryegrass (Lolium perenne L.), cocksfoot and prairie grass, and to evaluate quantitatively farmer perception of the feed quality, palatability and dry matter (DM) production of these species under dryland conditions. The survey responses confirmed that perennial ryegrass is currently the dominant perennial grass species utilised in Tasmanian dairy pastures and that the herbage quality, palatability and annual DM production of perennial ryegrass under dryland conditions is generally considered to be substantially higher than for cocksfoot and prairie grass.
An initial field study investigated the effect of defoliation management based on leaf regrowth stage on the productivity and herbage quality of perennial ryegrass, prairie grass and cocksfoot under dryland conditions. The DM yield and quality of cocksfoot and prairie grass were found to be comparable with perennial ryegrass under appropriate defoliation management. While the 2-leaf to 3-leaf regrowth stage was previously well-recognised as the most favourable defoliation interval for perennial ryegrass pastures, this study showed that a defoliation interval coinciding with regrowth of four leaves provided an optimal balance between pasture productivity and herbage quality for cocksfoot and prairie grass.
The physiology underlying the regrowth response of cocksfoot and prairie grass following defoliation was further investigated in a series of four glasshouse studies. Changes in the physiology and herbage quality of prairie grass during regrowth were examined, and results provided further evidence that the optimal defoliation interval for prairie grass is the 4-leaf stage of regrowth, as this is when increased watersoluble carbohydrate (WSC) levels in the stubble coincide with a resumption of tillering and root growth, but is prior to the reduction of herbage quality due to increased senescent and stem material.
The role of nitrogenous (N) and WSC reserves during regrowth of these species was further investigated, concluding that as with perennial ryegrass, the stubble (tiller base below 50 mm height) is the primary storage site for energy reserves and the priority sequence for allocation of WSC reserves follows the expected order of leaf growth, root growth and tillering for both species. Nitrogenous energy reserves were found to play a minor role in the regrowth of cocksfoot plants following defoliation. For prairie grass, although WSC reserves were identified as the primary contributor to plant regrowth following defoliation, there was a strong relationship between stubble N concentration and regrowth parameters. The distribution of WSC reserves within the stubble of cocksfoot and prairie grass was also determined. The pattern of WSC accumulation in the stubble of these species suggests that the previously adopted defoliation stubble height of 45-50 mm (optimal management for perennial ryegrass) is also suitable for the persistence of cocksfoot and prairie grass. However, while decreasing defoliation height to 30 mm may be acceptable for cocksfoot, prairie grass is more sensitive to defoliation severity, with defoliation below 45 mm not recommended.
Differences between four cocksfoot and four brome cultivars (including Kara and Matua) under leaf stage based defoliation management in the glasshouse were xamined. Variation between cultivars indicated that there are some improvements resulting from selection and breeding within the cocksfoot and brome genera since the commercial release of Kara and Matua. However, whether the overall value of the newer cultivars to dairy pasture systems exceeds the value of the original cultivars is yet to be determined.
The remaining potential limitations to the use of Matua and Kara in the dairy industry, as highlighted in this thesis, include slow establishment of Kara in the field, high rates of seeding for Matua, and relatively high fibre levels for both cultivars compared with perennial ryegrass. However, the overall results show that under defoliation management based on leaf stage, an optimal balance between pasture yield, persistence and herbage quality can be achieved, supporting the future use of cocksfoot and prairie grass in dryland dairy pastures of southern Australia.
Libri sul tema "Cocksfoot"
1
Wood, Vaughan. Akaroa cocksfoot: King of grasses. Christchurch, New Zealand: Canterbury University Press, 2014.
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2
Bevan, Louise Jane. Isolation, characterisation and classification of Cocksfoot grass pollen allergens. Birmingham: University of Birmingham, 1995.
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3
Walsh, David James. The isolation, molecular cloning and characterization of cocksfoot grass pollen allergens. Birmingham: University of Birmingham, 1990.
Cerca il testo completoCapitoli di libri sul tema "Cocksfoot"
1
Sanada, Yasuharu, Marie-Christine Gras e Edzard van Santen. "Cocksfoot". In Fodder Crops and Amenity Grasses, 317–28. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-0760-8_13.
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2
Sastry, K. Subramanya, Bikash Mandal, John Hammond, S. W. Scott e R. W. Briddon. "Dactylis glomerata (Cocksfoot)". In Encyclopedia of Plant Viruses and Viroids, 815–19. New Delhi: Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3912-3_301.
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3
Rognli, O. A., K. Aastveit e T. Munthe. "Genetic Variation in Resistance to Cocksfoot Mottle Virus in Cocksfoot (Dactylis Glomerata L.)." In Developments in Plant Breeding, 308–10. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0966-6_55.
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4
Mäkinen, K., T. Tamm, V. Næss, E. Truve, L. Järvekülg, T. Munthe, D. R. Blystad, Ü. Puurand e M. Saarma. "Characterization of Cocksfoot Mottle Virus (CFMV)". In Developments in Plant Breeding, 305. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0966-6_53.
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5
Barre, Philippe, Latifa Zhouri, Rajae Kallida, Bernadette Julier, Naima Shaimi, Malika Fakiri e Florence Volaire. "Towards Productive Summer Dormant Cocksfoot for Mediterranean Climates". In Quantitative Traits Breeding for Multifunctional Grasslands and Turf, 145–49. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9044-4_21.
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Bushman, B. S., M. D. Robbins, S. E. Larson e J. E. Staub. "Genotyping by Sequencing in Autotetraploid Cocksfoot (Dactylis glomerata) without a Reference Genome". In Breeding in a World of Scarcity, 133–37. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28932-8_20.
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Valero, M., e I. Olivieri. "Adjacent Populations of Cocksfoot (Dactylis Glomerata L.): A Detailed Study of Allozyme Variation across Contrasting Habitats". In Genetic Differentiation and Dispersal in Plants, 339–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70837-4_22.
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de Montard, F. X., H. Rapey, R. Delpy e P. Massey. "Competition for light, water and nitrogen in an association of hazel (Corylus avellana L.) and cocksfoot (Dactylis glomerata L.)". In Agroforestry for Sustainable Land-Use Fundamental Research and Modelling with Emphasis on Temperate and Mediterranean Applications, 135–50. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-0679-7_9.
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BORRILL, MARTIN. "Evolution and Genetic Resources in Cocksfoot* *This article was reprinted with minor modifications from the Annual Report, 1977 (pp. 190–209) of the Welsh Plant Breeding Station, University College of Wales, Aberystwyth, Wales, UK, with the permission of Dr M. Borrill, the author, and Dr D. Wilson, the Director of the Welsh Plant Breeding Station. The editors express sincere thanks to Dr M. Borrill and Dr D. Wilson for their kind permission to reprint this article." In Developments in Plant Genetics and Breeding, 379–97. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-444-88260-8.50025-2.
Testo completoAtti di convegni sul tema "Cocksfoot"
1
Privalova, Kira, e Ruslan Karimov. "Botanical composition and quality of feed when using grazing herbs with festulolium". In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2021. http://dx.doi.org/10.33814/mak-2021-25-73-106-112.
Testo completoAbstract (sommario):
The results of 14-year studies on the botanical composition and quality of grazing feed using herbs, created on the basis of the domestic variety of festulolium VIK 60, are presented. Experimentally substantiated promising grass mixtures in the composition of the festulolium, cocksfoot and bluegrass meadow.
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Zhezmer, Natalya. "YIELD AND SPECIES COMPOSITION OF EARLY RIPENING CEREAL MOWING AGROCENOSES WITH LONG-TERM USE". In Multifunctional adaptive feed production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-22-70-47-52.
Testo completoAbstract (sommario):
Data on yield and species composition of long-term (23–25 years of use) early ripening cereal grass mowing agrocenoses are presented. Owing to the high biological potential of self-renewal of the meadow foxtail, the cocksfoot, and the meadow bluegrass, against the background of the recommended nutrition level N90-180P20-40K100-150, a valuable composition of seeded grass stands is preserved.
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Malysheva, Natalia, Alla Soloveva, Tatiana Dyubenko, Nadezhda Kovaleva e Leonid Malyshev. "Evaluation of cocksfoot (Dactylis glomerata L.) collection of different geographical origin in the Leningrad region". In Research for Rural Development 2019 : annual 25th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2019. http://dx.doi.org/10.22616/rrd.25.2019.052.
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Kozlov, Nikolay, Tamara Komkova, Mikhail Makarenkov, Valentina Korovina e Tatyana Kozlova. "DEPENDENCE OF GERMINATION OF SEEDS OF FODDER CROPS ON THE DURATION OF STORAGE IN A GAS ENVIRONMENT". In Multifunctional adaptive fodder production 26 (74). ru: Federal Williams Research Center of Forage Production and Agroecology, 2021. http://dx.doi.org/10.33814/mak-2021-26-74-90-97.
Testo completoAbstract (sommario):
The research was carried out in the laboratory conditions of the Federal Williams Research Center of Forage Production and Agroecology on the seed material of nineteen varieties of the selection of VIC, stored since 1986 in a gas environment. The viability of the seeds was determined after 33 years of storage. The laboratory germination rate of the samples after storage varied from 0.7 to 90.3%. Aging of cereal grasses is faster. After storage in a gas environment for 33 years germination of more than 80% was observed in four samples of the legume family and one of the cereals. After being removed from the CSG and placed in normal conditions for a year, most of the samples retained their economic validity, with the exception of forage cereals: brome grass, meadow and reed fescue, and cocksfoot.