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Effect of jugular vein essential amino acid infusion on milk production in dairy cattle

Published online by Cambridge University Press:  05 November 2021

L A Crompton ,
M A Lomax ,
C K Reynolds ,
F R C Backwell ,
B J Bequette ,
J D Sutton ,
D E Beever  and
J C MacRae
L A Crompton
Affiliation:
School of Animal & Microbial Sciences, Whiteknights, PO Box 228, The University of Reading, Reading RG6 6AJ, United Kingdom
M A Lomax
Affiliation:
School of Animal & Microbial Sciences, Whiteknights, PO Box 228, The University of Reading, Reading RG6 6AJ, United Kingdom
C K Reynolds
Affiliation:
Centre for Dairy Research, University of Reading, Arborfield Hall Farm, Arborfield, Reading RG2 9HX, United Kingdom
F R C Backwell
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB, United Kingdom
B J Bequette
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB, United Kingdom
J D Sutton
Affiliation:
Centre for Dairy Research, University of Reading, Arborfield Hall Farm, Arborfield, Reading RG2 9HX, United Kingdom
D E Beever
Affiliation:
Centre for Dairy Research, University of Reading, Arborfield Hall Farm, Arborfield, Reading RG2 9HX, United Kingdom
J C MacRae
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB2 9SB, United Kingdom
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Extract

Milk protein concentration can be influenced by dietary manipulation, but the efficiency of amino acid transfer into milk and the predictability of the response are both poor. Previous reports from this research group have demonstrated that milk protein concentration can be repeatedly increased in response to vascular infusions of essential amino acids (EAA) in animals fed on a low crude protein (CP) diet (140 g CP/kg DM) in mid-lactation (Metcalf et al., 1996). The present study was designed to compare milk protein content responses to vascular EAA infusion in animals fed a high protein diet (180 g CP/kg DM) at peak lactation.

Type
Dairy
Information
Proceedings of the British Society of Animal Science , Volume 1996 , March 1996 , pp. 87
Copyright
Copyright © The British Society of Animal Science 1996

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References

Metcalf, J.A., Crompton, L.A., Wray-Cahen, D., Lomax, M.A., Bequette, B.J., MacRae, J.C., Backwell, F.R.C., Lobley, G.E., Sutton, J.D. & Beever, D.E. (1996). Responses in milk constituent secretion to intravascular administration of two mixtures of amino acids in dairy cows. Journal of Dairy Science. In press.10.3168/jds.S0022-0302(96)76500-1CrossRefGoogle Scholar