Effects of dietary protein degradability and casein or amino acid infusions on production and plasma amino acids in dairy cows

Journal of Dairy Science
W M SeymourJ H Herbein

Abstract

Responses to daily abomasal infusions of 400 g sodium caseinate, 400 g hydrolyzed casein, or 11.3 g L-methionine plus 30.1 g L-lysine were compared in eight Holstein cows fed diets with estimated ruminal protein degradabilities of 70 and 60.%. Basal diets contained corn silage and corn with either soybean meal or 66.7:33.3 soybean meal:corn gluten meal added. Infusion with Methionine plus lysine increased milk protein content when cows fed either diet but increased milk fat content and yield only when the soybean meal diet was fed. Sodium caseinate increased milk and milk protein production and decreased milk fat percentage. Concentration of total essential amino acids, branched chain amino acids, and urea cycle amino acids were increased by the infusion of both casein sources. Methionine-lysine infusion increased plasma lysine and taurine, a metabolite of methionine, suggesting that absorbed methionine was extensively metabolized. Results demonstrate an impact of both ruminal degradability of dietary protein and form of infused protein on amino acid nutrition of lactating daily cows.

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Citations

Dec 22, 1999·The Proceedings of the Nutrition Society·P Faverdin
Jan 30, 2003·Archiv für Tierernährung·Zuzana CeresnákováPatrícia Dolesová
Aug 5, 2004·Journal of Dairy Science·L DoepelH Lapierre
Jan 19, 1999·Journal of Dairy Science·M D HaniganJ L Beckett
Aug 1, 1997·Journal of Dairy Science·Z WuR J Fisher
Sep 1, 1992·Journal of Dairy Science·W M SeymourJ H Herbein
May 21, 2013·Journal of Dairy Science·B EdmundsF J Schwarz
Dec 5, 2000·Journal of Dairy Science·M KorhonenP Huhtanen
May 1, 1995·Journal of Dairy Science·G A MeijerA M Van Vuuren
May 9, 2019·Biological Trace Element Research·Tarek Hassan MostafaMohamed Salah Ayyat
Mar 1, 1993·Metabolism: Clinical and Experimental·G A MeijerA M van Vuuren
Aug 8, 2021·Animals : an Open Access Journal From MDPI·Jung-Eun Kim, Hong-Gu Lee

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