维生素A在反刍动物日粮营养中的作用和需要量

摘要

维生素A是动物生长发育所必需的营养因子.本文围绕反刍动物营养中对维生素A的需要量和吸收代谢特点、类胡萝卜素消化和吸收进行综述,总结了维生素A在反刍动物日粮中的需要量,旨在为反刍动物的维生素A合理利用提供参考.%Vitamin A is an essential nutrient for animal growth and development.This paper reviews the requirements and characteristics of absorption and metabolism of vitamin A as well as the characteristics of digestion and absorption of carotenoid in ruminants,and summarizes the need of vitamin A in ruminant diets,with an aim to provide a reference for the proper use of vitamin A in ruminant diets.