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Body composition and performance of autumn-calving Holstein-Friesian dairy cows during lactation: food intake, milk constituent output and live weight

Published online by Cambridge University Press:  24 November 2017

J.D Sutton
Affiliation:
AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead, Berkshire SL6 5LR
K. Aston
Affiliation:
AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead, Berkshire SL6 5LR
D.E Beever
Affiliation:
AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead, Berkshire SL6 5LR
W.J. Fisher
Affiliation:
AFRC Institute of Grassland and Environmental Research, Shinfield, Reading, Berkshire RG2 9AQ
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Extract

The importance of measuring partition between body and milk in dairy cows and identifying the factors underlying it has long been recognised. However accurate measurements of partition In the body are few because of the difficulty and expense of the techniques.

The purpose of the present experiment was to measure the effects in autumn-calving Holstein-Friesian cows given grass silage ad libitum of amount of concentrate and stage of lactation on body composition by direct (Gibb et al 1992a, b) and Indirect (Kings et al 1992) techniques, adipose tissue metabolism (Walsh et al 1992) and milk production. In a related trial, energy balance was measured in other cows by Indirect calorimetry (Cammell et al 1992).

This report covers silage Intake, milk production and live-weight change. Communications on the associated studies are given in the Proceedings of this Meeting.

Type
Dairy Cow Metabolism and Nutrition
Copyright
Copyright © The British Society of Animal Production 1992

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