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The route of absorbed nitrogen to milk protein

  • H. Lapierre (a1), R. Berthiaume (a1), M. C. Thivierge (a2), L. Doepel (a2), D. Pacheco (a3) and G.E. Lobley (a4)...

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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?

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The route of absorbed nitrogen to milk protein

  • H. Lapierre (a1), R. Berthiaume (a1), M. C. Thivierge (a2), L. Doepel (a2), D. Pacheco (a3) and G.E. Lobley (a4)...

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