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Energy metabolism in high yielding cows

Published online by Cambridge University Press:  05 November 2021

D.E Beever
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6 AT
S.B. Cammell
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6 AT
J.D. Sutton
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6 AT
N. Rowe
Affiliation:
W.Cumber & Son (Theale), Manor Farm, Marcham, Abingdon 0X13 6NZ
G.E. Perrott
Affiliation:
Trident Feeds, PO Box 11, Oundle Road, Peterborough PE2 9QX
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Extract

Whilst current rationing systems are used to calculate the metabolisable energy (ME) requirements of dairy cows producing more than 50kg milk/day, the extent to which the digestive efficiency of the cow may be compromised at high intake levels has not been established. Equally the effect of a sustained energy deficit on milk composition is not known whilst the extent of energy contribution from mobilised tissue has not been quantified. This study was designed to examine energy metabolism in high yielding cows offered ad libitum total mixed ration during early/mid lactation.

Type
Programme
Copyright
Copyright © The British Society of Animal Science 1998

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References

Cammell, S.B., Thomson, D.J., Beever, D.E., Haines, M.J., Dhanoa, M.S. and Spooner, M.C. [1986]. The efficiency of energy utilisation in growing cattle consuming fresh perennial ryegrass (Lolium perenne cv Melle) or white clover (Trifolium repens cv Blanca). British Journal of Nutrition, 55,669–80.CrossRefGoogle Scholar