作　　者： ; ; ; ; ;

机构地区： 中国农业科学院北京畜牧兽医研究所

出　　处： 《动物营养学报》 2005年第4期41-45,共5页

摘　　要： 选用288羽AA肉仔鸡,随机分成Ⅰ、Ⅱ、Ⅲ、Ⅳ组,每组72羽,6个重复,每个重复12羽(公母各半),Ⅰ组(对照组)为玉米-豆粕型基础日粮组,Ⅱ、Ⅲ、Ⅳ组分别为基础日粮添加低、中、高酶活外源酶试验组,以研究外源酶对肉仔鸡生长性能、养分表观代谢率及免疫功能的影响。结果表明:添加外源酶,前期(0～3周)Ⅱ、Ⅲ和Ⅳ组日增重分别比对照组提高2.76%(P<0.05)、3.84%(P<0.05)和2.77%(P<0.05),饲料利用率分别改善6.85%(P<0.05)、8.22%(P<0.05)和8.22%(P<0.05);全期(0～6周)Ⅱ、Ⅲ、Ⅳ组饲料利用率分别比对照组改善4.64%(P<0.05)、6.70%(P<0.05)和8.25%(P<0.05);提高肉仔鸡免疫器官指数,21日龄Ⅱ、Ⅲ和Ⅳ组的法氏囊相对重量较对照组分别提高30.77%(P<0.05)、19.62%(P<0.05)和27.69%(P<0.05),42日龄Ⅱ、Ⅲ和Ⅳ组的胸腺相对重量分别较对照组提高23.82%(P<0.05)、43.16%(P<0.05)和29.01%(P<0.05);21日龄Ⅱ、Ⅲ和Ⅳ组与对照组比较,血清总蛋白含量分别提高11.32%(P<0.05)、17.58%(P<0.05)和13.19%(P<0.05),血清球蛋白含量分别提高14.11%(P<0.05)、21.86%(P<0.05)和10.54%(P<0.05)。肉仔鸡能量、养分表观代谢率和血清抗体IgG含量均有提高的趋势,但差异不显著(P>0.05)。 The effects of exogenous enzymes on performance,nutrient metabolism and immune function in broilers were investigated in this study.A total of 288 1-day-old AA broilers were randomly divided into 4 groups,6 replicates in each group and 12 chickens in each replicate （6 males and 6 females）.In Group Ⅰ the broilers were fed corn-soybean based diet as control,in group Ⅱ,Ⅲ and Ⅳ,the broilers were fed with basal diet supplemented low, middle and high levels of exogenous enzymes respectively.Tbe results showed as follows：with supplementation of exogenous enzymes,AWG of group Ⅱ,Ⅲ and Ⅳ was increased by 2.76%（P〈0.05）,3.84%（P〈0.05） and 2.77%（P〈0.05） respectively and F/G was improved by 6.85%（P〈0.05）,8.22%（P〈0.05） and 8.22%（P〈0.05）respectively in 0～3 weeks;F/G of group Ⅱ,Ⅲ and Ⅳ was improved by 4.64%（P〈0.05）,6.70%（P〈0.05） and 8.25%（P〈0.05） respectively in 0～6 weeks;Supplementation of exogenous enzymes improved the indexes of immune organs,fabricius comparative weight of group Ⅱ,Ⅲ and Ⅳ was increased by 30.77%（P〈0.05）,19.62%（P〈0.05） and 27.69%（P〈0.05） respectively on 21st day,thymus comparative weight of group Ⅱ,Ⅲ and Ⅳ was increased by 23.82%（P〈0.05）,43.16% （P〈0.05） and 29.01%（P〈0.05） respectively on 42nd day;with supplementation of exogenous enzymes,total protein content in serum of group Ⅱ,Ⅲ and Ⅳ was increased by 11.32%（P〈0.05）,17.58%（P〈0.05） and 13.19%（P〈0.05） respectively,and globin content in serum was increased by 14.11%（P〈0.05）,21.86%（P〈0.05） and 10.54%（P〈0.05） respectively on 21st day.Apparent metabolic rate of energy and dietary nutrients and the content of IgG in serum also increased,but not significantly（P〉0.05）.

关 键 词： 玉米 豆粕日粮 肉仔鸡 外源酶 生长性能 免疫功能

领　　域： [农业科学] [农业科学]