关键词: 益生素, 畜禽健康养殖, 作用机理

Abstract: Probiotic is a new type of nontoxic and unpolluted feed addivites of biological products.It has some specific fuctions such as adjusting the microecological balance in animal organism,preventing diseases,enhancing the feed/gain ratio,promoting animal health and protecting ecological environment, instead of antibiotic ,probiotic hasn't toxins and side-effects ,drug residuses and resistences,so it has been extensively used in animal product.The origins,kinds,functional mechanisms of feeding probiotic were discussed in animal healthy cultivation.

Key words: probiotic, animal healthy cultivation, functional mechanisms