期刊
LIVESTOCK SCIENCE
卷 109, 期 1-3, 页码 282-285出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.livsci.2007.01.019
关键词
amino acids; digestibility; pigs
Measures of ileal digestibility (ID) are used routinely as estimates of amino acid (AA) bio-availability in pig feed ingredients. Values for ID may be expressed as apparent (AID), standardized (SID), or true (TID). Values for AID are calculated by deducting the total ileal outflow of AA (the sum of endogenous losses (IAA(end)) and non-digested dietary AA) from dietary AA intake. The IAA(end) may be separated into basal losses, which are not influenced by feed ingredient composition, and specific losses induced by feed ingredient characteristics such as anti-nutritional factors and dietary fiber. If the AID values are corrected for total IAA(end) then values for TID are calculated. Lack of additivity of AID values in feed formulation may be overcome by correcting AID values for basal IAA(end) only, which yields SID values. Until reliable procedures for the routine measurement of specific IAA(end) become available, it is suggested that SID values are used for feed formulation. It is advisable that basal IAA(end) are measured in digestibility experiments and that these losses are reported with SID values. (c) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据