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The efficiency of amino acid utilisation by the mammary gland of holstein friesian cows fed three levels of dietary crude protein

Published online by Cambridge University Press:  24 November 2017

J A Metcalf ,
D Wray-Cahen ,
B J Bequette ,
F R C Backwell ,
D J Humphries ,
D E Beever  and
J D Sutton
J A Metcalf
Affiliation:
Dept of Biochemistry & Physiology, University of Reading, Reading RG6 2AJ
D Wray-Cahen
Affiliation:
Dept of Biochemistry & Physiology, University of Reading, Reading RG6 2AJ
B J Bequette
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
F R C Backwell
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB
D J Humphries
Affiliation:
Dept of Agriculture, University of Reading, Reading RG6 2AT
D E Beever
Affiliation:
Dept of Agriculture, University of Reading, Reading RG6 2AT
J D Sutton
Affiliation:
Dept of Agriculture, University of Reading, Reading RG6 2AT
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Extract

Although milk output is known to be affected by dietary manipulation, studies have so far failed to provide sufficient information to successfully predict dietary effects on both milk protein content and yield (Thomas 1983). In a further effort to determine the metabolic control of milk protein synthesis three diets containing different levels of crude protein were fed to four Holstein-Friesian cows in early- to mid-lactation, and metabolite flow across the mammary gland was measured in relation to milk protein production.

Type
Ruminant Protein Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 3
Copyright
Copyright © The British Society of Animal Production 1993

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References

Davis, S.R. and Mepham, T.B. (1974). Amino acid and glucose uptake by the isolated perfused guinea pig mammary gland. Quarterly Journal of Experimental Physiology. 59:111 Google Scholar
Metcalf, J.A., Sutton, J.D., Cockbum, J.E., Napper, D.J and Beever, D.E. (1991). The influence of insulin and amino acid supply on amino acid uptake by the lactating mammary gland. Journal of Dairy Science 74:3412 CrossRefGoogle Scholar
Thomas, P.C.(1983).Milk Protein. Proceedings of the Nutrition Society.42:40 CrossRefGoogle Scholar