中文摘要：

采食是动物消化吸收的首要环节，也是其生长发育的前提。饲粮营养水平不当和比例失衡不仅会影响采食量，也会影响动物的生产性能和免疫机能，还可能导致各种异嗜行为的出现。已知饲粮的氨基酸水平对采食的影响尤为重要。本文重点就亮氨酸、色氨酸、组氨酸和谷氨酸等对畜禽采食的影响，以及其通过中枢和外周途径的作用机制等研究进展做简要综述。

英文摘要：

Feed intake is the first step of digestion and absorption,and also the precondition of growth and development for animals.Dietary nutrients imbalance not only reduces feed intake or affects animal performance and immune function,but also leads to allotriophagia.In all nurients,dietary amino acid level is particularly important to regulate feed intake.This article has briefly reviewed the effects of leucine,tryptophan,histidine and glutamic acid on feed intake regulation,as well as their central and peripheral mechanisms.