酿酒酵母对麻黄肉鸡生长性能和疫苗免疫应答能力的影响

Effect of Saccharomyces cerevisiae on growth performance and vaccine immune response in Mahuang broiler

试验旨在研究酿酒酵母对麻黄肉鸡生长性能和疫苗免疫应答能力的影响。选取1日龄健康麻黄肉鸡60只,随机分成2组,每组3个重复,每个重复10只。对照组为基础日粮,酵母组为基础日粮+1×10^(7) CFU/g酿酒酵母,试验期84 d。结果显示,与对照组相比,添加酿酒酵母显著降低麻黄肉鸡的平均日采食量和料重比(P<0.05)。对照组和酵母组麻黄肉鸡的免疫器官指数无显著性差异(P>0.05),酵母组的肠道指数低于对照组。56 d时,酵母组肉鸡禽流感(H9亚型)疫苗免疫的抗体效价极显著高于对照组(P<0.01)。研究表明,酿酒酵母能够在一定程度上提高麻黄肉鸡育成阶段的生长性能,提高禽流感灭活疫苗免疫的抗体水平,对幼雏鸡的生长性能和免疫性能无正向影响。

The purpose of the experiment was to study the effect of Saccharomyces cerevisiae on growth performance and immune response ability of the vaccine in Mahuang broiler.A total of 60 one-day-old healthy Mahuang broilers were randomly divided into two groups,with three replicates in each group,ten for each replicate.The control group was basic diet,and the yeast group was basic diet added 1×10^(7) CFU/g Saccharomyces cerevisiae.The test period was 84 d.The results showed that compared with control group,adding Saccharomyces cerevisiae significantly reduced the average daily feed intake and feed to gain ratio of Mahuang broiler(P<0.05).There was no significant difference in immune organ index between the two groups(P>0.05),and the intestinal index of yeast group was lower than that of control group.On the 56th day,the antibody titer of avian influenza(H9 subtype)vaccine in yeast group was extremely higher than that in control group(P<0.01).The study indicates that Saccharomyces cerevisiae can improve the growth performance of Mahuang broiler in the breeding stage to a certain extent,improve the antibody level of inactivated avian influenza vaccine,it has not positive effect on growth performance and immune performance of chicks.