Variations in herbage mass and digestibility, and the grazing behaviour and herbage intake of adult cattle and weaned calves
作者:
J. HODGSON,
W. S. JAMIESON,
期刊:
Grass and Forage Science
(WILEY Available online 1981)
卷期:
Volume 36,
issue 1
页码: 39-48
ISSN:0142-5242
年代: 1981
DOI:10.1111/j.1365-2494.1981.tb01537.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
AbstractTwo experiments are described in which groups of lactating cows, non‐lactating cattle and weaned calves grazed a sequence of swards varying in maturity and herbage mass under strip grazing management at a daily herbage allowance of 60 g dry matter per kg live weight. Lactating cows ate 43% and 76% more herbage than non‐lactating cattle of similar weight in the two experiments but herbage OM intakes per unit live weight by the calves and lactating cows were similar.Variations in diet digestibility and herbage intake in the lactating and non‐lactating cattle with changes in sward conditions were similar. In the first experiment the calves were experienced grazers; the variation in the digestibility of the herbage selected was less in the calves than the adult cattle, but the variation in herbage intake was greater. The calves in the second experiment were younger, and they were inexperienced grazers; their ability to increase herbage intake in response to changing sward conditions was poorer than that of adult cattle, though variations in diet digestibility were similar in all classes.The practical implications of these results are discussed br
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