大麦饲粮添加粗酶制剂对雏鸡增重、甲状腺激素水平及免疫力的影响

选用１４４羽伊莎公雏，７日龄随机均分为４组，分别饲喂玉米基础饲粮（ＣＣ），大麦基础饲粮（ＢＣ）；大麦基础饲粮＋０１％Ａｖｉｚｙｍｅ－１１００酶制剂（ＢＦ）；大麦基础饲粮＋０．１％浙江酶制剂（ＢＺ）。结果表明７～２１日龄雏鸡增重添酶组均高于大麦基础饲粮对照组；采食量增加不显著；而料重比显著降低（Ｐ＜００１）。２１日龄时雏鸡血清Ｔ３水平添酶组亦高于大麦饲粮组，而Ｔ４水平则无多大差异；淋巴细胞转化率２１日龄时ＢＺ、ＢＦ组分别比大麦对照组高２４５７％和３１０１％（Ｐ＜００５），２８日龄时分别高３９５３％（Ｐ＜００５）和７４１５％（Ｐ＜００１）。

EFFECT OF CRUDE ENZYME PREPARATION SUPPLEMENTED TO BARLEY BASED DIET ON THE BODY WEIGHT GAIN, IMMUNITY AND ENDOCRINE SECRETION IN CHICKS

144 heads,7 days old ISA Brown male chicks were allocated into 4 groups fed maize based diet (CC),barley based diet(BC),BC+0.1% Avizyme-1100 crude enzyme,BC+0.1 Zhejiang crude enzyme(BZ),respectively,for 14 days.Day 21 old all chicks were killed and blood sample collected for RIA of thyroid hormones and T lymphocytes transformation test.The results showed that the body weight gain of 7～21 days chicks was higher in both enzyme supplemented groups(BZ and BF) by 6.62%(P<0.05) and 4.87%,whereas feed conversion efficiency lowered by 5.93%(P<0.01) and 3.20%(P<0.01),respectively,compared to those of barley based diet group.The serum T3 content was increased by 12.77% and 15.22% for enzyme supplemented groups, in 21 days old chicks,compared to control group,while no significant difference for T4 level was found.The lymphocyte transformation rate of 7～21 days chicks was increased 24.57% in BZ and 31.01% in BF group(P<0.05),while that of 7～28 days chicks was increased by 39.53%(P<0.05) and 74.15%(P<0.01),respectively.