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

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

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）。

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.