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The route of absorbed nitrogen to milk protein

Published online by Cambridge University Press:  20 November 2017

H. Lapierre ,
R. Berthiaume ,
M. C. Thivierge ,
L. Doepel ,
D. Pacheco  and
G.E. Lobley
H. Lapierre
Affiliation:
Agriculture and Agri-Food Canada, Lennoxville, QC, Canada, J1M 1Z3
R. Berthiaume
Affiliation:
Agriculture and Agri-Food Canada, Lennoxville, QC, Canada, J1M 1Z3
M. C. Thivierge
Affiliation:
Université Laval, Québec, QC, Canada, G1K 7P4
L. Doepel
Affiliation:
Université Laval, Québec, QC, Canada, G1K 7P4
D. Pacheco
Affiliation:
AgResearch Ltd, Private Bag 11008, Palmerston North, New-Zealand
G.E. Lobley
Affiliation:
Rowett Research Institute, Aberdeen, UK, AB21 9SB / Email address: lapierreh@agr.gc.ca
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Extract

Although the efficiency of transfer of N is higher in dairy cows than in growing ruminants, there is still room for improvement as only approximately 30% of the ingested N is recovered in milk protein. The remainder is excreted in faeces (30%) and urine (40%). This review will focus on the metabolic utilisation of the digested N fraction: where in the body is this N partitioned between anabolic (milk protein, tissue growth) and catabolic (urine) fates and what factors influence its efficiency of use?

Type
Invited Papers
Information
Proceedings of the British Society of Animal Science , Volume 2004 , 2004 , pp. 255
Copyright
Copyright © The British Society of Animal Science 2004

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