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

  • L A Crompton (a1), M A Lomax (a1), C K Reynolds (a2), F R C Backwell (a3), B J Bequette (a3), J D Sutton (a2), D E Beever (a2) and J C MacRae (a3)...

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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.

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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.

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

  • L A Crompton (a1), M A Lomax (a1), C K Reynolds (a2), F R C Backwell (a3), B J Bequette (a3), J D Sutton (a2), D E Beever (a2) and J C MacRae (a3)...

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