酵母多糖对种鸡生产性能和免疫功能的影响

Effects of Zymosan on Production Performance and Immunity in Hens

旨在研究日粮中添加不同水平酵母多糖对于种鸡生产性能和免疫功能的影响。试验选用288羽45周龄的良凤花种鸡,随机分为4个处理组,每个处理组设3个重复,每个重复24只鸡。第Ⅰ组喂以基础日粮,设为对照组;第Ⅱ组添加0.15%的酵母多糖;第Ⅲ组添加0.20%的酵母多糖;第Ⅳ组添加0.25%的酵母多糖。试验前各组生产性能差异不显著,预饲期1周,试验期7周,共8周。结果表明,日粮中添加不同水平的酵母多糖对种鸡生产性能和免疫功能均有显著影响,添加水平为0.15%时产蛋率提高4.56%,种蛋受精率提高3.27%,入孵蛋孵化率提高了7.45%,种鸡体内白介素-2(IL-2)含量较对照组提高7.54%;添加水平为0.20%时产蛋率提高9.16%,种蛋受精率提高4.22%,入孵蛋孵化率提高了5.69%,种鸡体内白介素-2(IL-2)和干扰素-γ(IFN-γ)的含量较对照组也分别提高了9.17%(IL-2)和11.82%(IFN-γ)。综合整个试验来说,在种鸡日粮中添加0.20%的酵母多糖为最适水平。

The aim of this study was to investigate the effects of zymosan at different supplement dosages on production performance and immunity of hens. A total of 288 Liangfeng breeding hens at 45 weeks old were selected and assigned randomly into four treatment groups, three repeats in each group, 24 chicks in each repeat. The chicks in the group I , II, III and IV were fed with basal diet （Control）, basal diet supplemented zymosan at a level of 0.15%, basal diet supplemented zymosan at a level of 0.20%, and basal diet supplemented zymosan at a level of 0.25%. Prior the trial, the chicks had no significant different performance between groups. The prefeeding period was 1 week, and the experimental period was 7 weeks. The results showed that zymosan at different supplement dosages had significant effects on production performance and immunity of hens. When the zymosan was supplemented to the diets at a level of 0.15%,the laying rate, the fertility rate, hatchability, and level of IL-2 were increased by 4.56%, 3.27%, 7.45% and 7.54%, respectively. When the zymosan was supplemented to the diets at a level of 0.20%, the laying rate,the fertility rate, hatchability, level of IL-2 and level of IFN-γ were increased by 9.16%, 4.22%, 5.69%, 9.17% and 11.82%, respectively. Therefore, the optimal level of zymosan in hen diet is 0.20%.