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Body composition and performance of autumn-calving Holstein-Friesian dairy cows during lactation: metabolic activity in vitro of subcutaneous adipose tissue

Published online by Cambridge University Press:  24 November 2017

A. Walsh ,
J. D. Sutton  and
D. E. Beever
A. Walsh
Affiliation:
AFRC Institute for Grassland and Environmental Research, Hurley, Maidenhead, Berkshire, SL6 5LR
J. D. Sutton
Affiliation:
AFRC Institute for Grassland and Environmental Research, Hurley, Maidenhead, Berkshire, SL6 5LR
D. E. Beever
Affiliation:
AFRC Institute for Grassland and Environmental Research, Hurley, Maidenhead, Berkshire, SL6 5LR
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Extract

In early lactation dairy cows use stored body fat to provide an additional source of energy to support milk production and these reserves are replaced when energy requirements for milk synthesis are reduced. The extent to which body fat is mobilized depends on the nutritional state of the animal and its genetic potential. These changes are accompanied by substantial alterations in the intermediary metabolism of adipose tissue. The aim of this work was to investigate the timing and magnitude of changes in synthetic and lipolytic pathways in adipose tissue from dairy cows during a lactation cycle and at three levels of energy intake.

Fifty four cows were fed grass silage ad libitum and a concentrate ration at 3(L), 6(M) or 9(H) kg DM/day (Sutton et al 1992). An initial group of six cows was slaughtered at 2 to 4 days post partum (week 0) followed by two cows from each treatment at weeks 2, 5, 8, 11, 14, 19, 24 and 29.

Type
Dairy Cow Metabolism and Nutrition
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 104
Copyright
Copyright © The British Society of Animal Production 1992

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References

Sutton, J. D., Aston, K., Beever, D. E. and Fisher., W. J. (1992) Food intake, milk constituent output and live weight. Summaries, BSAP Winter Meeting.CrossRefGoogle Scholar