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Each group was set with 5 replicates and 10 lactating cows per replicate.The pre-test period lasted for 7 days and the test period lasted for 42 days.The blood biochemical and immune indexes of lactating cows in each group were analyzed statistically.[Result] ALT,TBIL,CK,ALB,BUN,Na,P,Ca and other blood biochemical indexes of lactating cows in bacterial enzyme preparation group 1,group 2 and group 3 were better than those in control group（P<0.05）. The blood biochemical indexes of bacterial enzyme preparation group 2 were the best.There was no significant difference in IgM,IgG and TNF-α in control group,bacterial enzyme preparation group 1,group 2 and group 3（P> 0.05）. IgA in bacterial enzyme preparation group 2 was higher than that group 1,group 3 and control group（P<0.05）,and there was no significant difference between bacterial enzyme preparation group 1 and group 3（P>0.05）.IL-2 in bacterial enzyme preparation group 1,group 2 and group 3 were higher than that in control group（P<0.05）,and there was no significant difference in IL-2 in group 1,group 2 and group 3（P>0.05）.[Conclusion] Bacterial enzyme preparation could improve the blood biochemical indexes of lactating cows and enhance the immune capacity of the body,and 0.2% was the most suitable addition., authors=ZHANG Jixi, authorsList=ZHANG Jixi, authorCompany=Animal Husbandry and Veterinary Station,Diantou Town,Linshu County,Linyi Shandong 276700, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1321413614553117341, articleId=1321413614246933148, tenantId=1146029695717560320, journalId=1296801528146919473, language=CN, title=日粮添加菌酶制剂对泌乳奶牛血液生化及免疫指标的影响, columnId=1297134031582294810, journalTitle=中国乳业, columnName=饲养管理, runingTitle=null, highlight=null, articleAbstract=[目的] 研究奶牛日粮中添加菌酶制剂对其血液生化指标及免疫指标的影响。[方法] 选某规模化奶牛场200 头身体健康,胎次、年龄相近的泌乳奶牛为研究对象,用随机数字表法分4 组（n=50）,分别为对照组（基础日粮）、菌酶制剂1组（基础日粮+0.1%菌酶制剂）、菌酶制剂2组（基础日粮+0.2%菌酶制剂）和菌酶制剂3组（基础日粮+0.3%菌酶制剂）。每组设置5 个重复,每个重复10 头。预试期7 d,正试期42 d。统计分析各组泌乳奶牛的血液生化和免疫指标。[结果] 菌酶制剂1组、2组和3组ALT、TBIL、CK、ALB、BUN、Na、P、Ca等血液生化指标优于对照组（P<0.05）。菌酶制剂2组血液生化指标最理想。对照组、菌酶制剂1组、2组和3组IgM、IgG、TNF-α无显著差异（P>0.05）。菌酶制剂2组IgA高于1组、3组和对照组（P<0.05）,其中菌酶制剂1组和3组无显著差异（P>0.05）。菌酶制剂1组、2组和3组IL-2高于对照组（P<0.05）,菌酶制剂1组、2组和3组无显著差异（P>0.05）。[结论] 菌酶制剂可改善泌乳奶牛血液生化指标,增强机体免疫能力,以0.2%添加量最适宜。, authors=张计玺, authorsList=张计玺, authorCompany=山东省临沂市临沭县店头镇畜牧兽医工作站,山东临沂 276700, correspAuthors=null, authorNote=张计玺（1969-）,男,山东临沂人,本科,高级兽医师,研究方向为动物检疫与疫病防控。, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=D7/0XhD0d4gryGyVXbRVNQ==, pdfFileSize=1281591, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null)}, authors=null, keywords=[Keyword(id=1321413614817358495, tenantId=1146029695717560320, journalId=1296801528146919473, articleId=1321413614246933148, language=CN, orderNo=1, keyword=菌酶制剂), Keyword(id=1321413614892855968, tenantId=1146029695717560320, journalId=1296801528146919473, articleId=1321413614246933148, language=CN, orderNo=2, keyword=泌乳奶牛), Keyword(id=1321413614955770529, tenantId=1146029695717560320, 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