Seasonal changes in quality and botanical composition of a rotationally grazed grass-legume pasture in southern Ontario

Autor:	J. G. Buchanan-Smith, C. P. Campbell, S. A. Marshall
Rok vydání:	1998
Předmět:	geography geography.geographical_feature_category Food Animals Agronomy Grazing Animal Science and Zoology Composition (visual arts) Biology Pasture Legume
Zdroj:	Canadian Journal of Animal Science. 78:205-210
ISSN:	1918-1825 0008-3984
DOI:	10.4141/a97-002
Popis:	Seasonal changes in quality and botanical composition of a grass-legume pasture were investigated under a controlled rotationally grazed system. A 19.2-ha area divided into sixteen 1.2-ha fields, each subdivided into eight paddocks, was grazed by 40 cows with calves over three consecutive summers. Grazing was managed by setting target sward heights for exit of each paddock between 8 and 10 cm and allowing at least 25 to 30 d for regrowth. Herbage growth in those paddocks not grazed by cow-calf pairs was consumed by yearling heifers on a "put and take" basis. Paddocks were topclipped at 10 cm and fertilized with 34 kg ha−1 of N immediately following the second grazing cycle. Botanical composition changed both within and among the grazing seasons. Legume content of the pasture increased (P
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::945eb28be2f6a66c8e8d56fc6a71008a https://doi.org/10.4141/a97-002 Zobrazit plný text záznamu