β-甘露聚糖酶对AA+鸡生产性能和免疫功能的影响

为了探讨日粮中添加β-甘露聚糖酶对AA+鸡生产性能和免疫功能的影响，选取1日龄健康的AA+肉鸡180羽，随机为2个处理组，每个处理3个重复，每个重复30只。试验分为对照组(基础日粮)和试验组（基础日粮+ 400g/Tβ-甘露聚糖酶），试验期42天。结果表明β-甘露聚糖酶能不同程度的提高AA鸡各生长阶段的日增重和饲料转化率，但差异显著（P>0.05），明显提高42d血液中免疫球蛋白IgM、IgG、IgA的含量，差异显著。21d、42d的免疫器官指数、T淋巴细胞转化率和ND抗体水平也有不同程度的提高，与对照组相比，差异不显著（P>0.05）。说明β-甘露聚糖酶能提高肉用鹌鹑生长性能和增强免疫的功能。

The Effect ofβ-mannanase on Growth Performance and Immunity Function of AA+Chicken

In order to study the effects of dietary β -mannanase on the growth performance and immunity function of AA^ ＋ chicken, 180 one-day-old AA^ ＋ chicken were randomly divided into control group and treatment group, each group had 3 replicates and 30 AA ^＋ chicken in each replicate. Control group was fed with basal diet , treatment group was fed with basal diet supplemented 0.04% β -mannanase. The experiment period was 42 days. The results showed that β -mannanase could increase with varying degrees average daily gain and reduce feed/gain ratio （ P0.05 ） ; enhance significantly the levels of immunoglobulin M （IgM）, IgA, and IgG in viremic blood （P0.05） in 42 days. Immune organ indexes, antibody level against ND and T lymphocyte transformation rate had different degrees of improvement , no significant difference （P0.05） between control group and treatment group. The results indicated that β -mannanase could improve the growth performance, and immunity function of AA^ ＋ chicken respectively.