Assessing amino acid utilization in young Nellore steers fed high-concentrate diets with different sources and levels of nitrogen

Vinícius Carneiro de Souza,Juliana Duarte Messana,Erick Darlisson Batista,Kênia Larissa Gomes Carvalho Alves,Ana Verônica Lino Dias,Letícia Marra Campos,Laís de Oliveira Lima,Yury Tatiana Granja-Salcedo,Letícia Rodrigues Faria,Geovany Macêdo Carvalho,Alexandre Vaz Pires,Telma Teresinha Berchielli

Animal Feed Science and Technology（2020）

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摘要

•Dietary protein sources affect rumen microbial amino acids (AA) composition.•Rumen undegradable protein sources can increase essential AA supply in feedlot diets.•Microbial AA digestibility is not affected by protein sources and protein levels.•AA use efficiency is affected by protein sources and protein levels.•AA use efficiency differ between AA.

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关键词

BW,CGM,CP,DDG,DM,EAA,iNDF,LAB,MICP,NEAA,PAB,PL,PS,RUP,RDP,SU,TDN

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