反刍动物饲料蛋白质营养价值评定体系研究进展

Advances in Protein Evaluation System of Feeds for Ruminants

传统的粗蛋白或可消化蛋白体系,虽然在畜禽生产上使用有其科学合理性,但对于有着特殊消化生理的反刍动物而言,存在很大的缺陷。因此,20世纪70年代以来,各国纷纷提出了基于反刍动物消化生理的新蛋白体系。经过近几十年的科学研究,各新蛋白体系也在不断补充完善。本文对各蛋白质体系及其优缺点作一介绍。

The protein value of foods for ruminants was expressed earlier as crude protein （CP） or digestible crude protein （DCP）.The limitation of these system became apparent as more knowledge about protein metabolism in the gastrointestinal tract of ruminants accumulated.More new system, which based on the nitrogen metabolism of ruminants have been introduced in practice in many countries asa replacement for the CP or DCP system in 1970s. Some of the systems have already been updated since they first were introduced. This article reviewed the protein evaluation system of feeds for ruminants and analyses the merits and demerits of all kinds of new protein evaluation system.