Progress in ileal endogenous amino acid flow research in poultry  

作　　者：V.Ravindran 

机构地区：[1]Monogastric Research Centre,School of Agriculture and Environment,Massey University,Palmerston North 4442,New Zealand

出　　处：《Journal of Animal Science and Biotechnology》2021年第2期415-425,共11页畜牧与生物技术杂志（英文版）

摘　　要：The progress in our understanding of the endogenous protein concept over the past century is reviewed.Nondietary proteins found in the digesta at the terminal ileum of poultry,known as endogenous protein loss,are comprised of digestive secretions,mucus and sloughed gut epithelial cells.The measurement of this loss is of fundamental importance because it is an indicator of gut metabolism and is essential to adjust apparent estimates of ileal amino acid digestibility.The ileal endogenous amino acid losses comprise of two components,namely basal and specific losses.The basal losses are fixed and associated with feed dry matter intake,whereas the specific losses are variable and induced by the presence of dietary components such as fibre and anti-nutrients.Currently there is no methodology available to directly measure the specific endogenous losses and these losses are calculated by determining the basal and total(basal plus specific)losses and,then subtracting the basal losses from total losses.The seminal features,specific applications and shortcomings of available methodologies are briefly outlined as well as the practical challenges faced in using the published endogenous amino acid loss values for true digestibility corrections.The relevance of taurine as a component of endogenous protein flow in poultry is identified for the first time.

关 键 词：Basal loss Digestible amino acids Endogenous amino acid losses POULTRY Specific loss 

分 类 号：S852.2[农业科学—基础兽医学]