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1、加酶益生素对肉鸡免疫功能及生长性能的影响动物医学班：指导老师：摘要：为探讨加酶益生素对肉鸡免疫功能及生长性能的影响，本实验选用1日龄罗斯308肉鸡1000只，公母自然比例，随机分为两组，Ⅰ组为正常对照组，Ⅱ组为试验组（在饲料中添加加酶益生素0.1％），连用45天。结果表明：试验组平均脾脏指数1.20g、法氏囊平均指数2.87g、胸腺平均指数5.26g；对照组平均脾脏指数0.92g、法氏囊平均指数2.20g胸腺平均指数3.94g；试验组均高于对照组，两组比较差异显著（P<0.05）；试验组平均日增重为44.3g，而未饲喂加酶益生素的对照组，平均日增重为39
2、.7g，试验组比对照组提高增重11.6%，两组差异极显著（P<0.01）。数据表明加酶益生素对肉鸡免疫功能及生长性能均有促进作用。关键字：肉鸡；加酶益生素；生长性能；免疫功能TheInflunceofPlusEnzymeProbioticesontheBroilerImmuneFunctionandGrowthPerformanceNameAdvisor:prof.teacherAbstract：Inordertoinvestigatetheenzymeprobioticseffectsongrowthperformanceandimmunefuncti
3、onofbroilers,Thisexperimentselected1000one-day-oldRoss-308broilers,theproportionofmaleandfemalenature,wererandomlydividedintotwogroups,Ⅰgroupwasnormalcontrolgroup,groupⅡintoexperimentalgroup(infeedenzymeprobiotics0.1%)for45days.Theresultsshowedthat:Theaverageindexofspleenintestgr
4、oup1.20g,Thebursaaverageindex2.87g,Thethymusindexaverage5.26g;thecontrolgrouptheaverageindexofspleenindex0.92g,bursalindexaverage2.20gandthymusindexaverage3.94g;thetestgroupwerehigherthanthoseinthecontrolgroup,significantdifferencebetweenthetwogroups(P>0.05);Thetestgroupaverageda
5、ilygainof44.3g,butnotfedcontrolgroupwithenzymeprobiotics,theaveragedailygainof39.7g,thetestgroupthanthecontrolgroupincreasedby11.6%,twogroupsweresignificantlydifferent(P>0.01).Datashowthattheenzymeprobioticsongrowthperformanceandimmunefunctioninbroilerchickenshavepromotingeffect.
6、Thetestgroupaveragedailygainof44.3g,butnotfedcontrolgroupwithenzymeprobiotics,theaveragedailygainof39.7g,thetestgroupthanthecontrolgroupincreasedby11.6%,twogroupsweresignificantlydifferent(P>0.01).Datashowthattheenzymeprobioticsongrowthperformanceandimmunefunctioninbroilerchicken
7、shavepromotingeffect.Keywords：Enzymeprobiotics;Thebroiler;Growthperformance;Immunefunction1前言人或者动物通过食物摄取的，具有营养保健作用和生物活性的微生物被称作益生菌。益生素是活体微生物制成的生物活性制剂，随着防大于治思想日益被接受和重视，饲料添加剂的广泛应用已不是罕事，而作为近些年来被不断研究认识的益生素，也已经成为饲料添加剂不可缺少的成分。根据俄国学者塔拉卡诺夫的报道，提出益生素可适用范围为：增强机体非特异性免疫力；防治并发性为肠道感染；防治由于日粮组成剧变、
8、技术作业性应激等所导致的营养源性消化障碍。最初的益生菌主要包括：嗜酸乳杆菌、干酪
