... Preparation is a new kind of bio-active feed additive, whose functional elements are mainly digestive enzyme, such as protease and amylase, and non-digestive enzyme, such as cellulose, xylanase and pectinase ...
... Preparation is a new kind of bio-active feed additive, whose functional elements are mainly digestive enzyme, such as protease and amylase, and non-digestive enzyme, such as cellulose, xylanase and pectinase ...