Results 261 to 270 of about 2,224 (288)

Sward Structure of Simple and Complex Mixtures of Temperate Forages

Agronomy Journal, 2006
Sward 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, K. J. Soder, N. Brzezinski, F. Taube, K. Klement, L. D. Muller, M. Wachendorf   +6 more
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Sward growth under cutting and continuous stocking managements: sward canopy structure, tiller density and leaf turnover

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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Predicting animal production on sourveld: A sward‐based approach

African Journal of Range and Forage Science, 1996
Simulation models were developed to assess the effects of sward structure and species composition on average daily gain (ADG) and seasonal live mass gain (LWG) in cattle and sheep on Döhne Sourveld.
O'Reagain, Peter J., P.J. O'Reagain
exaly   +2 more sources

Effects of fire on sward structure and grazing in western Serengeti, Tanzania

African Journal of Ecology, 2008
Fire 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, Graciela M. Rusch, Håkan Hytteborn, Christina Skarpe, Idris Kikula   +4 more
openaire   +1 more source

Leaf age structure and canopy photosynthesis in rotationally and continuously grazed swards

Grass and Forage Science, 1988
AbstractThe leafage structure of ryegrass canopies and its role in canopy photosynthesis were compared under continuous and rotational grazing by sheep. Under continuous grazing, an increase in the intensity of grazing increased the proportion (by leaf area) of young leaves in the sward. A mechanistic mathematical model was used to demonstrate how this
A. J. PARSONS, I. R. JOHNSON, J. H. H. WILLIAMS   +2 more
openaire   +1 more source

Behavioural mechanisms of intake rate by heifers grazing swards of contrasting structures

Applied Animal Behaviour Science, 2014
Abstract 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, Paulo César De Faccio Carvalho, Lidiane Fonseca, Carolina Bremm, Carlos Cangiano, Horacio Leandro Gonda, Emilio Andrés Laca   +6 more
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Structural equation modeling reveals complex relationships in mixed forage swards

Crop Protection, 2015
Abstract 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, Samiran Banerjee, Edward W. Bork, Linda M. Hall, Donald D. Hare   +4 more
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Spatiotemporal Genetic Structure within White Clover Populations in Grazed Swards

Crop Science, 2003
White 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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Relationship between Herbage Intake and Sward Structure of Grazed Temperate Grasses

Crop Science, 2011
Temperate 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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Sward structure and foraging behaviour of cattle grazing reproductive tropical pastures

2023
The grazing process requires the animal to manipulate the herbage with its cropping apparatus (mouth, teeth and tongue) in order to select the most nutritious parts of the sward. The main variables involved in the grazing process are bite dimensions, bite mass, bite rate, instantaneous intake rate (IIR) and the rate of nutrient intake (RNI).
openaire   +2 more sources