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Responses of lactating cows to energy and protein supplementation while grazing a restricted allowance of grass

Published online by Cambridge University Press:  05 November 2021

D.C. Patterson ,
F.J. Gordon ,
C.P. Ferris  and
C.S. Mayne
D.C. Patterson
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, Northern Ireland
F.J. Gordon
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, Northern Ireland
C.P. Ferris
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, Northern Ireland
C.S. Mayne
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, Northern Ireland
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Extract

Earlier work has indicated low responses in milk yield to supplementation with concentrates during grazing (Leaver, 1985). The substitution effect of concentrates on herbage dry matter intake is high at generous allowances of grass, but is much lower when the allocation of grass is low (Meijs and Hoekstra, 1984). It is therefore expected that the responses in milk yield to supplementation with concentrates during grazing would be greater with a restricted allowance of grass. The aim of the experiment was to measure the milk yield responses of high yielding cows to increased energy and protein supplementation, when offered a restricted allowance of grass.

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Programme
Information
Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 195
Copyright
Copyright © The British Society of Animal Science 1998

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References

Meijs, J.A.C. and Hoekstra, J.A. 1984. Concentrate supplementation of grazing dairy cows. 1. Effect of concentrate intake and herbage allowance on herbage intake. Grass and Forage Science, 39, 59–66.10.1111/j.1365-2494.1984.tb01665.xCrossRefGoogle Scholar
Leaver, J.D. 1985. Milk production from grazed temperate grassland. Journal of Dairy Research, 52, 313–344.CrossRefGoogle ScholarPubMed