Results 301 to 310 of about 16,324 (341)
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Grass and Forage Science, 1982
AbstractThe change in structure of continuously grazed versus infrequently cut swards of perennial ryegrass (Lolium perenne L), cv. S23, was investigated during their first full harvest year. Measurements were made from early May until late September. The intensity of stocking by sheep in the grazed sward was adjusted in an attempt to maintain a high ...
M. B. JONES, B. COLLETT, SIAN BROWN
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AbstractThe change in structure of continuously grazed versus infrequently cut swards of perennial ryegrass (Lolium perenne L), cv. S23, was investigated during their first full harvest year. Measurements were made from early May until late September. The intensity of stocking by sheep in the grazed sward was adjusted in an attempt to maintain a high ...
M. B. JONES, B. COLLETT, SIAN BROWN
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Mechanistic simulation of the vertical structure of mixed swards
Ecological Modelling, 2002Abstract The vertical structure is an important feature of mixed swards, as it influences the inter-species competition for light, as well as the patterns of grazing. Although the experimental measurement of the vertical sward structure is relatively straightforward, the mechanistic and dynamic modelling of the leaf density and lamina density ...
Schulte, R.P.O., Lantinga, E.A.
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Spatiotemporal Genetic Structure within White Clover Populations in Grazed Swards
Crop Science, 2003White clover (Trifolium repens L.) populations exhibit high genetic and clonal diversity, but often exist for many decades in grazed swards at northern midlatitudes. This study was conducted to determine whether genetic structure exists within rapidly changing populations and is a factor in creating genetic diversity. Trifoliate leaf samples were taken
David L. Gustine, Gerald F. Elwinger
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Structure of Tall Fescue Swards and Intake of Grazing Cattle
Agronomy Journal, 1990AbstractModels of grazing systems need logic that estimate herbage intake of livestock from physical and chemical properties of the sward. Changeover designs were used to study the effects of sward structure of tall fescue (Festuca arundinacea Schreb. cv. Kenhy) on ingestive behavior of grazing cattle. Fourteen (Tl), 21 (T2), and 28 (T3) days of growth
J. E. Arias +4 more
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Sward Structure of Simple and Complex Mixtures of Temperate Forages
Agronomy Journal, 2006Sward composition and structure influence herbage intake of grazing animals. We conducted a grazing study to examine how forage mixture complexity affected sward structure. Replicated 1‐ha pastures (Hagerstown silt loam soil: fine, mixed, semiactive, mesic, Typic Hapludalf) were planted to either orchardgrass (Dactylis glomerata L.) and white clover ...
M. A. Sanderson +6 more
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Structural equation modeling reveals complex relationships in mixed forage swards
Crop Protection, 2015Abstract Relationships among vegetation components in perennial pastures are complex, particularly those including grasses, weeds, legumes, and other forbs. Where herbicides are used for broadleaf weed control, a trade-off may exist between the benefits of weed removal and legume loss.
Erin M. McLeod +4 more
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Relationship between Herbage Intake and Sward Structure of Grazed Temperate Grasses
Crop Science, 2011Temperate grasses differ in sward structure, which may influence herbage intake of grazing cattle. We compared herbage intake of meadow fescue [Schedonorus pratensis (Huds.) P. Beauv.], orchardgrass (Dactylis glomerata L.), quackgrass [Elymus repens (L.) Gould], and reed canarygrass (Phalaris arundinacea L.) grazed by dairy heifers, and determined its ...
Geoffrey E. Brink, Kathy J. Soder
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Effects of fire on sward structure and grazing in western Serengeti, Tanzania
African Journal of Ecology, 2008Fire is one of the major ecological factors that determines structure and function of grassland and savanna ecosystems through its effects on soil nutrient pools, floristic composition and primary production, and foraging behaviour and distribution of populations of wildlife species.
Shombe N. Hassan +4 more
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Behavioural mechanisms of intake rate by heifers grazing swards of contrasting structures
Applied Animal Behaviour Science, 2014Abstract The relationship between herbage intake by herbivores and herbage available depends on the interaction between sward structure and animal behaviour. This relationship is a crucial component determining the stability, function and productivity of grazing systems.
Jean Carlos Mezzalira +6 more
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