鸭源枯草芽孢杆菌的应用以及益生菌株的筛选鉴定

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1、分类号密级：HUAZHONGAGRICULTURALUNIVERSITY硕士学位论文MASTER’SDEGREEDISSERTATION鸭源枯草芽孢杆菌的应用以及益生菌株的筛选鉴定APPLICATIONOFBACILLUSSUBTILISANDPROBIOTICSTRAINSCREENING,IDENTIFICATIONFROMDUCK研究生:胡振华CANDIDATE：HUZHENHUA学号:2016302120019STUDENTNO.：专业:农业硕士MAJOR：MASTEROFAGRICULTURE导师:龚炎长教授SUPERVISOR：PROFESSORGONGYANZHANG钱运国推

2、广研究员PROFESSORQIANYUNGUO中国武汉WUHAN，CHINA二○一八年六月JUNE，2018华中农业大学硕士学位论文鸭源枯草芽孢杆菌的应用以及益生菌株的筛选鉴定ApplicationofBacillusSubtilisandProbioticStrainScreening,IdentificationFromDuck研究生:胡振华学号:2016302120019指导教师:龚炎长教授钱运国推广研究员学位类型:农业硕士领域：养殖华中农业大学动物科技学院动物医学院中国·武汉CollegeofAnimalSciencesandTechnologyHuazhongAgruicultu

3、ralUniversityWuhan,China鸭源枯草芽孢杆菌的应用以及益生菌株的筛选鉴定目录摘要...................................................................................................................................iABSTRACT............................................................................................................

4、............iii缩略词表.............................................................................................................................vi1前言..................................................................................................................................11.1研究问题的由来........

5、...............................................................................................11.1.1滥用抗生素的危害.............................................................................................11.2芽孢杆菌作为益生菌的优势................................................................................

6、...31.2.1益生菌的种类.....................................................................................................31.2.2芽孢杆菌的益生功能............................................................................................41.3芽孢杆菌的作用机理..............................................................

7、.................................51.3.1产生多种消化酶，促进动物对营养成分的吸收利用.....................................51.3.2产生多种抗菌物质，促进动物肠道微生态平衡.............................................61.3.3增强动物的免疫能力............................