摘要： 旨为研究黄芪多糖(APS)、复方多糖(CPS)、酵母培养物(YC)、核酸(NA)和转移因子(TF)等5种免疫增强剂对集约化规模化生产免疫程序下青年蛋鸡生长性能和免疫功能的影响。选择体重一致的11周龄海兰褐青年蛋鸡240只,分为6个处理,每个处理4个重复,每个重复10只鸡。其中,1组为对照组,饲喂基础日粮;2~6组为试验组,在饲喂基础日粮的同时分别使用APS、CPS、YC、NA和TF5种免疫增强剂产品。预饲期(7d)对试鸡进行采血,测定ND和H5-4抗体水平。选择ND及H5-4抗体水平一致的青年鸡48只,编号1~48,随机分配到6个处理组中。试验期6周。从整个试验期来看,各处理组间青年蛋鸡生长性能指标(采食量、体增重和料重比)、非特异性免疫指标(溶菌酶活性)、体液免疫指标(ND、H5-4抗体水平及IgG水平)、细胞免疫指标(T淋巴细胞转化率)均无显著差异(P>0.05)。本试验中,5种免疫增强剂产品对集约化规模化生产免疫程序下青年蛋鸡免疫功能的改善无显著作用,各产品间无显著差异。

关键词: 免疫增强剂, 青年蛋鸡, 生长性能, 免疫功能

Abstract: The trial was conducted to study the effects of astragalus polysaccharides (APS),compound polysaccharide(CPS),yeast culture ( YC ),nucleic acid(NA) and transfer factor(TF) on performance and immune function of pullets in the immune program in scaled and intensive poultry system. Two hundred and forty pullets(Hyline Brow) 11 week old were divided into 6 groups with 4 replicates in each group and 10 pullets per replicate. The average weight per replicate was similar. Pullets in group 1(Control group) were fed with corn}oybean based diet and the rest pullets in 5 groups (Group2) were fed with based diets supplied with APS,CPS,YC,NA and TF respectively. Blood samples were collected to detect the hemagglutination inhibition(HI) antibody titers against Newcastle disease virus(NDV) and H5 influenza virus(H5-4-AIV) in 7 play adaptation. Forty-eight pullets were selected and signed number to divide into 6 groups and make sure that antibody titers against NDV and HS4}1IV per replicate was similar. The results showed that:After 6 weeks, no significant difference ( P>0.05)in performance parameters such as total feed intake (TFI),body weight gain (BWG),and feed/gain(F/G) was observed among the six groups. Nonspecific immunity (Activity of lysozyme),humoral immunity(Antibody titers against NDV and H5-AIV,IgG concentration) and cellular immunity (T lymphocyte transformation rates) also did not differ significantly (P>0.05 ) among groups. The present data suggested that APS,CPS,YC,NA and TF had no positive effects on performance and immune function of pullets in the immune program in scaled and intensive poultry system, and there were no difference among five immune synergists.

Key words: Immune synergist, Pullet, Performance, Immune function

中图分类号: 

• S831