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ID:33359773
大小:3.54 MB
页数:68页
时间:2019-02-25
《日粮添加维吉尼亚霉素对肉牛瘤胃发酵及瘤胃微生物的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、新疆农业大学硕士学位论文日粮添加维吉尼亚霉素对肉牛瘤胃发酵及瘤胃微生物的影响姓名:郭同军申请学位级别:硕士专业:生物化学与分子生物学指导教师:王加启;罗淑萍20090601日粮添加维吉尼亚霉素对肉牛瘤胃发酵及瘤胃微生物的影响摘要本论文旨在研究日粮中添加维吉尼亚霉素对肉牛瘤胃发酵及瘤胃微生物的影响。选用4头安装有瘤胃瘘管的肉牛(559.4士30.1kg)进行重复交叉试验设计,每期28天。基础日粮粗精比为35:65(干物质基础)。对照组为空白日粮,处理组中维吉尼亚霉素添加量为30mg.kg’1精料(干物质基础)。分别于正试验期的第27天和第28天的饲喂前8
2、:00,饲喂后12:00和18:00采集瘤胃液。一部分瘤胃液进行厌氧培养用于亨氏滚管计数和抽提DNA用于菌种特异性荧光实时定量PCR定量。剩余的瘤胃液用于瘤胃pH值、挥发性脂肪酸、瘤胃氨氮和L.乳酸的分析。瘤胃发酵参数的测量结果显示:维吉尼亚霉素能提高瘤胃pH值(6.70VS6.63;P<0.05)和瘤胃氨氮的利用程度(4.94VS6.19mg·100mL~;P3、和蛋白降解菌有抑制作用(P4、inococcus)、黄色瘤胃球菌(Ruminococcus触vefaciens)、栖瘤胃普雷沃氏菌(Prevotellaruminicola)、总普雷沃氏菌(GenusPrevotella)和埃氏巨球形菌(Megasphaeraelsdenii)数量的影响统计差异不显著。试验结果表明:维吉尼亚霉素具有选择性抑制调节瘤胃微生物的能力,通过影响部分特殊瘤胃功能菌群数量的变化影响瘤胃微生物区系的变化,进而影响瘤胃发酵的改变。关键词:维吉尼亚霉素;亨氏滚管计数法;瘤胃发酵;荧光实时定量PCRIIInfluenceofVirginiamycinSuppleme5、ntationonRumenFermentationandMicrobialPopulationsinSteersAbstractThepurposeofthepresentstudywastoinvestigatetheinfluenceofvirginiamycinsupplementationonruminalfermentationandmicrobialpopulationsinsteers.Fourruminallycannulatedsteers(Bw559.44-30.1kg)wereusedinacross—overdesignexp6、erimentforaperiodof28days.Thebasalforagetoconcentratedietratiowas35:65ondrymatterbasis.TheexperimentwasconsistofcontroltreatmentandtreatmentwithcontroldietplusVM30mg·k91concentrate(DMbasis).Ruminalfluidwascollectedat08:00amprefeeding,at12:00amand18:00pmpost.feedingon27小and28c11d7、ays.Thepartofthepooledsamplefromlumenfluidwastransferredtoanaerobicculturebyroll—tubemchniqueandanalyseforspecies—specificreal—timePCRquantification.TheremainingpooledlumenfluidsampleWasanalyzedforpH,VFA,ammonia-NandL-lacticacid.TheresultsshowedthatVMincreasedtheruminalpH(6.70VS8、6.63;P<0.05),butdecreasedtheammonianitrogen(4.9
3、和蛋白降解菌有抑制作用(P4、inococcus)、黄色瘤胃球菌(Ruminococcus触vefaciens)、栖瘤胃普雷沃氏菌(Prevotellaruminicola)、总普雷沃氏菌(GenusPrevotella)和埃氏巨球形菌(Megasphaeraelsdenii)数量的影响统计差异不显著。试验结果表明:维吉尼亚霉素具有选择性抑制调节瘤胃微生物的能力,通过影响部分特殊瘤胃功能菌群数量的变化影响瘤胃微生物区系的变化,进而影响瘤胃发酵的改变。关键词:维吉尼亚霉素;亨氏滚管计数法;瘤胃发酵;荧光实时定量PCRIIInfluenceofVirginiamycinSuppleme5、ntationonRumenFermentationandMicrobialPopulationsinSteersAbstractThepurposeofthepresentstudywastoinvestigatetheinfluenceofvirginiamycinsupplementationonruminalfermentationandmicrobialpopulationsinsteers.Fourruminallycannulatedsteers(Bw559.44-30.1kg)wereusedinacross—overdesignexp6、erimentforaperiodof28days.Thebasalforagetoconcentratedietratiowas35:65ondrymatterbasis.TheexperimentwasconsistofcontroltreatmentandtreatmentwithcontroldietplusVM30mg·k91concentrate(DMbasis).Ruminalfluidwascollectedat08:00amprefeeding,at12:00amand18:00pmpost.feedingon27小and28c11d7、ays.Thepartofthepooledsamplefromlumenfluidwastransferredtoanaerobicculturebyroll—tubemchniqueandanalyseforspecies—specificreal—timePCRquantification.TheremainingpooledlumenfluidsampleWasanalyzedforpH,VFA,ammonia-NandL-lacticacid.TheresultsshowedthatVMincreasedtheruminalpH(6.70VS8、6.63;P<0.05),butdecreasedtheammonianitrogen(4.9
4、inococcus)、黄色瘤胃球菌(Ruminococcus触vefaciens)、栖瘤胃普雷沃氏菌(Prevotellaruminicola)、总普雷沃氏菌(GenusPrevotella)和埃氏巨球形菌(Megasphaeraelsdenii)数量的影响统计差异不显著。试验结果表明:维吉尼亚霉素具有选择性抑制调节瘤胃微生物的能力,通过影响部分特殊瘤胃功能菌群数量的变化影响瘤胃微生物区系的变化,进而影响瘤胃发酵的改变。关键词:维吉尼亚霉素;亨氏滚管计数法;瘤胃发酵;荧光实时定量PCRIIInfluenceofVirginiamycinSuppleme
5、ntationonRumenFermentationandMicrobialPopulationsinSteersAbstractThepurposeofthepresentstudywastoinvestigatetheinfluenceofvirginiamycinsupplementationonruminalfermentationandmicrobialpopulationsinsteers.Fourruminallycannulatedsteers(Bw559.44-30.1kg)wereusedinacross—overdesignexp
6、erimentforaperiodof28days.Thebasalforagetoconcentratedietratiowas35:65ondrymatterbasis.TheexperimentwasconsistofcontroltreatmentandtreatmentwithcontroldietplusVM30mg·k91concentrate(DMbasis).Ruminalfluidwascollectedat08:00amprefeeding,at12:00amand18:00pmpost.feedingon27小and28c11d
7、ays.Thepartofthepooledsamplefromlumenfluidwastransferredtoanaerobicculturebyroll—tubemchniqueandanalyseforspecies—specificreal—timePCRquantification.TheremainingpooledlumenfluidsampleWasanalyzedforpH,VFA,ammonia-NandL-lacticacid.TheresultsshowedthatVMincreasedtheruminalpH(6.70VS
8、6.63;P<0.05),butdecreasedtheammonianitrogen(4.9
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