冻干乳酸菌对肉鸡生长性能和免疫功能的影响  

Effects of freeze-drying lactic acid bacteria on immune response in broilers

作　　者：尹艳军[1] 郝延刚[1] 

机构地区：[1]河北农业大学生命科学学院,河北保定071000

出　　处：《饲料工业》2015年第10期36-40,共5页Feed Industry

摘　　要：试验旨在研究乳酸菌对肉鸡生长性能和免疫功能的影响。选用400只1日龄AA白羽肉仔鸡,随机分成4组,每组5个重复。第Ⅰ组为对照组,第Ⅱ、Ⅲ、Ⅳ组分别为低、中、高剂量组,即在基础日粮中分别添加0.5%、1.0%、2.0%的乳酸冻干菌菌粉。结果表明：1试验前期（1~21日龄）,Ⅲ、Ⅳ组肉鸡均重、平均日增重显著高于对照组（P〈0.05）;试验全期（1~42日龄）,Ⅲ组的料重比显著低于对照组（P〈0.05）。221、42日龄时,Ⅲ、Ⅳ组肉鸡胸腺指数、脾脏指数显著高于对照组（P〈0.05）。321日龄时,Ⅱ、Ⅲ、Ⅳ组RBC-CR1显著高于对照组（P〈0.05）,Ⅲ、Ⅳ组RBC-IC显著高于对照组（P〈0.05）;42日龄时,Ⅲ、Ⅳ组RBC-CR1、RBC-IC均显著高于对照组（P〈0.05）。4试验全期,Ⅲ、Ⅳ组对肉鸡T淋巴细胞转化率显著高于对照组（P〈0.05）。由此而知,添加1%、2%的乳酸冻干菌均能提高肉鸡的生产性能,促进免疫器官的生长发育,提高机体的体液免疫和细胞免疫水平。The purpose of this research was to study the effect of freeze-drying lactic acid bacteria on im-mune function and growth performance of Arbor Acres broiler chicken. 400 1-day-old AA broiler chick-ens were assigned into four groups randomly, each group had five repeats with 20 chickens. The Ⅰgroup was control group, group Ⅱ, Ⅲ and Ⅳ were experiment groups, which were added 0.5%, 1.0%,and 2.0% dosage of freeze-drying lactic acid bacteria in the basal diet. The results showed that： 1 Dur-ing early experimental period（1 d to 21 d）, compared with the control group, the average weight and dailygain of broilers in group Ⅲ and Ⅳ were significantly higher（P〈0.05）, and during the whole experiment,feed/gain（F/G） in group Ⅲ was significantly lower（P〈0.05）. 2 The index of thymus, spleen index of age21-day and 42-day broilers in group Ⅲ and Ⅳ were significantly higher than that in the control group（P〈0.05）. 3At the age of 21 days, the RBC-CR1 chaplet percentage of the group Ⅱ, Ⅲ and Ⅳ was sig-nificantly higher than the control group（P〈0.05）, meanwhile the RBC-IC chaplet percentage of the groupⅢ and Ⅳ was significantly higher than the control group（P〈0.05）. On 42 d, the RBC-CR1 and RBC-ICchaplet percentage of the group Ⅲ and Ⅳ were significantly higher than the control group（P〈0.05）. 4The transformation rate of peripheral T lymphocyte of the group Ⅲ and Ⅳ was significantly higher thanthe control group（P〈0.05） during the whole experiment. In conclusion, the supplementation both of1.0% and 2.0% freeze- drying lactic acid bacteria can improve the growth performance, promote thegrowth of the immune organs, enhance the level ofhumoral and cellular immunity response.

关 键 词：冻干乳酸菌 肉鸡 生长性能 免疫器官指数 红细胞花环率 T淋巴细胞转化率 

分 类 号：S831[农业科学—畜牧学]