The diet contained 45% barley and it wa added 0.1% Biokyowa enzyme preparation for treatment group in experimental phase (7-21day).

• 饲以大麦占45%25的日粮；试验组添加 0.；1%25的Biokyowa粗酶制剂。 实验期7-21日龄；21日龄采取血样；用放射免疫分析法测定其中TSH和甲状腺激素的含量。