不少国家在家禽家畜和鱼类养殖中,为了充分发挥饲料的作用,提高养殖效益,除在饲料中添加常用的饲料添加剂外,还开发使用了一些特殊的添加剂。柠檬酸英国的研究人员在仔猪饲料中添加20%的柠檬酸,用于饲喂仔猪,其日增重提高20%左右。黄霉菌素德国人在猪饲料中添加一定量的黄霉菌 In the poultry livestock and fish farming in many countries, in order to give full play to the role of feed, improve farming efficiency, in addition to feed commonly used feed additives, but also the development and use of some special additives. Citric acid British researchers add 20% citric acid to piglet feed to feed piglets with a daily gain of about 20%. Flavomycin Germans add a certain amount of yellow mold to pig feed