【摘要】 为研究复合益生菌制剂对黄羽肉鸡生产性能、抗氧化指标及免疫功能的影响,试验选用360羽黄羽肉鸡混合雏,随机分为4组,A组饲喂基础日粮,B组饲喂基础日粮及低剂量复合益生菌制剂(50g/t)、C组饲喂基础日粮及中剂量复合益生菌制剂(100g/t)、D组饲喂基础日粮及高剂量复合益生菌制剂(300g/t),每组9个重复,每个重复10羽,试验期50d。结果显示,复合益生菌试验D组日增重效果最佳,比对照组显著提高了4.11%(P<0.05),但与试验C组差异不显著,试验B组料重比最低,较对照组显著降低了4.58%(P<0.05),各益生菌试验组均能促进免疫器官发育,以试验D组免疫器官指数最佳,各试验组均能显著增加十二指肠绒毛长度(P<0.05),以试验D组的V/N值(肠绒毛/隐窝)最佳,试验D组显著提高血清中抗氧化指标和禽流感H5疫苗抗体滴度(P<0.05),同时增加抗体水平群体整齐度,但与试验C组差异不显著。结果表明,复合益生菌可以显著提高黄羽肉鸡生产性能,促进肠道发育,增强机体免疫功能及抗氧化水平,添加量以100g/t为最佳。更多还原

【Abstract】 The present study aimed to study the effects of applying mixed probiotics in the feed on growth performance,antioxidant activity and immune function in yellow-feathered broilers.Three hundred sixty yellow-feathered broilers at 10-day-old were divided into 4groups.Group A was fed with basal diets,group B with basal diets added 50g/t mixed probiotics,group C with basal diets added 100g/t mixed probiotics and group D with basal diets added 300g/t mixed probiotics.Each group included 9replicates(10birds per replicates),and the experiment lasted 50 days.Results showed that group D got the highest average daily gain(ADG)of all groups,and compared with the control group A,ADG was increased by 4.11%(P<0.05).Group B got the lowest feed-gain ratio of all groups,and the feed-gain ratio was decreased by 4.58%(P <0.05)compared with the control group A.Group D got significantly increased duodenal villous length,serum antioxidant index and antibody titer(P<0.05)compared with the control group A.The effects of mixed probiotics on the growth performance,antioxidant activity and immune function were distinct in yellowfeathered broilers,and 100g/t mixed probiotics was recommended.更多还原