A COMPARISON OF FOUR SYSTEMS OF MANAGING YEARLING BEEF STEERS ON ROTATIONALLY GRAZED, BROMEGRASS-ALFALFA PASTURE

Autor:	S. E. Beacom, J. A. Robertson, D. A. Cooke
Rok vydání:	1979
Předmět:	Bromus inermis geography Medicago geography.geographical_feature_category biology Silage Growing season Forage biology.organism_classification Pasture Stocking Food Animals Agronomy Animal Science and Zoology Dry matter
Zdroj:	Canadian Journal of Animal Science. 59:519-529
ISSN:	1918-1825 0008-3984
DOI:	10.4141/cjas79-065
Popis:	Four systems of animal management were applied to a rotationally grazed mixed sward of bromegrass (Bromus inermis Leyss.) and alfalfa (Medicago media Pers.) for a period of 7 yr using yearling beef steers. The systems included (i) put and take stocking; (ii) set stocking at 2.5 steers/ha with surplus herbage conserved as silage and fed later in the season; (iii) set stocking at 3.7 steers/ha, pasture herbage supplemented with oat soilage and (iv) set stocking as in (iii), pasture herbage supplemented with dry-rolled barley. Nitrogen, at the rate of 90 kg N/ha, was applied each spring during the last 4 yr of the experiment. Forage dry matter production varied from 1760 to 5750 kg/ha between years and was highly correlated with precipitation during the growing season. Average daily gains were similar for treatments i–iii at 1.03 kg/head. Feeding supplementary barley increased rate of gain to 1.19 kg (P
Databáze:	OpenAIRE
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