Mammary amino acid utilization in dairy cows fed fat and its relationship to milk protein depression

Journal of Dairy Science
J P CantR L Baldwin

Abstract

Changes in mammary AA utilization associated with dietary fat-induced milk protein depression were assessed in cows with disturbed AA status. Four first lactation cows fitted with rumen cannulas were assigned to a factorial arrangement of treatments: two diets and two casein infusion sites within a 4 x 4 Latin square design. Diets were formulated with yellow grease at 0 or 4% of DM. An 8% sodium caseinate solution was infused continuously at 5.04 kg/d into the rumen or abomasum during the last 5 d of each 21-d period. Arterial AA concentrations were reduced by dietary fat treatment and increased by abomasal sodium caseinate infusion. Mammary arteriovenous differences of essential AA tended to increase with both abomasal casein infusion and dietary fat treatments. With ruminal casein infusion treatments, yellow grease supplementation increased the percentage of extraction of blood essential AA into mammary tissue. Mammary blood flow rate dropped 7% on high fat treatments, preventing an increase in uptakes of critical AA to accompany the improved efficiency of milk synthesis, which was evident from a significantly reduced ratio of mammary blood flow to milk volume, resulting in depressed milk protein content.

References

Mar 1, 1978·Journal of Dairy Science·C R Baumrucker, P A Pocius
May 1, 1976·Journal of Dairy Science·R M WhitneyH E Swaisgood
May 1, 1979·Journal of Animal Science·G PeetersF Vershcooten
Jan 1, 1979·The Journal of Dairy Research·E RoetsG Peeters
Feb 1, 1979·Journal of Dairy Science·E RoetsG Proksch
Dec 1, 1977·Journal of Dairy Science·J E WohltC L Davis
Sep 1, 1976·The Journal of Physiology·J L LinzellM Peaker
Dec 1, 1975·Journal of Dairy Science·J H ClarkH R Spires
Aug 1, 1992·Journal of Dairy Science·E J DePeters, J P Cant
Nov 1, 1992·Journal of Dairy Science·E J DePeters, J D Ferguson
Aug 1, 1991·Journal of Dairy Science·M D HaniganR L Baldwin
Sep 1, 1985·Journal of Dairy Science·C R Baumrucker
Apr 6, 1973·Science·A Meister
Dec 1, 1974·The Biochemical Journal·E RoetsG Peeters
Aug 6, 1968·Biochimica Et Biophysica Acta·G N Jorgensen, B L Larson
Sep 1, 1965·Journal of Clinical Pathology·J K DawbornS E Black
Feb 1, 1982·Journal of Dairy Science·T B Mepham
Jul 1, 1981·Journal of Dairy Science·P A PociusC R Baumrucker
Oct 1, 1960·The Journal of Physiology·J L LINZELL

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Citations

Jul 1, 1997·The Proceedings of the Nutrition Society·M D HaniganJ France
Aug 19, 2007·Journal of Dairy Science·L DoepelH Lapierre
Nov 21, 2017·Journal of Dairy Science·D L Palmquist, T C Jenkins
Oct 24, 2008·Journal of Dairy Science·J GuoR A Kohn
Jul 1, 1997·Journal of Dairy Science·R J Madison-AndersonM R Lentsch
Feb 23, 2011·Journal of Dairy Science·H LapierreG E Lobley
Aug 1, 1996·Journal of Dairy Science·J J BaschH M Farrell
Jan 22, 1998·Journal of Dairy Science·J J BaschH M Farrell
Sep 1, 1994·Journal of Dairy Science·C K ReynoldsM J Cecava
Mar 16, 2006·Journal of Dairy Science·T C Jenkins, M A McGuire
Dec 5, 2000·Journal of Dairy Science·M KorhonenP Huhtanen
Apr 1, 1995·Journal of Dairy Science·J J BaschJ E Keys
Feb 1, 1997·Journal of Dairy Science·J E HensonH A Maiga

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