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时间:2019-05-24
《外源α-淀粉酶对21日龄肉鸡消化器官发育、肠道内源酶活性的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据畜牧兽医学报2007,38(7):672~677ActaVeterinariaetZootechnicaSinica外源仪一淀粉酶对21日龄肉鸡消化器官发育、肠道内源酶活性的影响蒋正宇,周岩民+,王(南京农业大学动物科技学院,南京恬210095)摘要:选用1日龄AA肉鸡440羽,随机分成4组,每组5个重复,分别饲喂基础日粮(对照组)和在基础日粮中添加1000U/kg(250mg/kg)、3000U/kg(750mg/kg)、9000U/kg(2250mg/kg)微生物a一淀粉酶的试验日粮,研究添加不同剂量外源a一淀
2、粉酶对肉鸡消化器官发育和内源酶活性变化的影响。结果表明:添加淀粉酶能降低肉鸡21日龄肝脏、肌胃、前肠相对重量和前肠相对长度(P>0.05),并提高了肉鸡前肠内容物淀粉酶、总蛋白酶(P<0.05)和胰蛋白酶(P3、粉酶;肉鸡;消化器官;内源酶中图分类号:$831.5文献标识码:A文章编号:0336—6964(2007)070672—06InfluenceofExogenousAlpha—amylaseSupplementationonDevelopmentofDigestiveOrgansandIntestinalEnzymeActivitiesof21·-day‘‘oldBroilersJIANGZheng—yu,ZHOUYan—min。,WANGTian(CollegeofAnimalScienceandTechnology,N4、anjingAgriculturalUniversity,Nanjing210095,China)Abstract:Fourhundredandfortyl—day—oldAAbroilerchickenswererandomlyallocatedtofourgroupsfor5replicates,andfedacommercialstarterdietandthesamedietssupplementedwith1000U/kg(250mg/kg),3000U/kg(750mg/kg),9000U/kg(2250mg/5、kg)ofa—amylasepreparationupto21dayofagetostudytheeffectsofsupplementary旺一amylaseofdifferentlevelsonthedevelopmentofdigestiveorgans,intestinalenzymeactivities.Theresultsshowedthatrel—ativeweightsofliver,gizzard,anteriorintestineandrelativelengthofanteriorintestinet6、endedtodecrease(P>0.05).Theincreasedactivitiesofamylase,protease(P<0.05),andtrypsin(P<0。05)inanteriorintestinalandhigh—dose—depressionresponseswiththeamylasesupplementationof2250mg/kgwereobserved.Lipaseactivity,however,wasunaffectedbyamylasesupplemen—tationofallle7、vels(P二>0.05).DNA,RNAconcentrationandtheactivitiesofmaltaseandsucrasewithinjejunalmucosawerenotaffectedbysupplementaryamylaseof250mg/kgand750mg/kg.High—dose—depressionresponseswerealsoobservedfortheactivitiesofmaltaseandsucrase(P<0.05).Keywords:旺一amylase;broilers;8、digestiveorgans;endogenousenzyme收稿日期:2006—08—08基金项目:国家重点基础研究发展计划(973)(2004CBll7500);国家自然科学基金资助(30300251)作者简介:蒋正宇(1982一),男,江苏金湖人,硕士,主要从事动物营养与饲料科学研究,E—mai
3、粉酶;肉鸡;消化器官;内源酶中图分类号:$831.5文献标识码:A文章编号:0336—6964(2007)070672—06InfluenceofExogenousAlpha—amylaseSupplementationonDevelopmentofDigestiveOrgansandIntestinalEnzymeActivitiesof21·-day‘‘oldBroilersJIANGZheng—yu,ZHOUYan—min。,WANGTian(CollegeofAnimalScienceandTechnology,N
4、anjingAgriculturalUniversity,Nanjing210095,China)Abstract:Fourhundredandfortyl—day—oldAAbroilerchickenswererandomlyallocatedtofourgroupsfor5replicates,andfedacommercialstarterdietandthesamedietssupplementedwith1000U/kg(250mg/kg),3000U/kg(750mg/kg),9000U/kg(2250mg/
5、kg)ofa—amylasepreparationupto21dayofagetostudytheeffectsofsupplementary旺一amylaseofdifferentlevelsonthedevelopmentofdigestiveorgans,intestinalenzymeactivities.Theresultsshowedthatrel—ativeweightsofliver,gizzard,anteriorintestineandrelativelengthofanteriorintestinet
6、endedtodecrease(P>0.05).Theincreasedactivitiesofamylase,protease(P<0.05),andtrypsin(P<0。05)inanteriorintestinalandhigh—dose—depressionresponseswiththeamylasesupplementationof2250mg/kgwereobserved.Lipaseactivity,however,wasunaffectedbyamylasesupplemen—tationofallle
7、vels(P二>0.05).DNA,RNAconcentrationandtheactivitiesofmaltaseandsucrasewithinjejunalmucosawerenotaffectedbysupplementaryamylaseof250mg/kgand750mg/kg.High—dose—depressionresponseswerealsoobservedfortheactivitiesofmaltaseandsucrase(P<0.05).Keywords:旺一amylase;broilers;
8、digestiveorgans;endogenousenzyme收稿日期:2006—08—08基金项目:国家重点基础研究发展计划(973)(2004CBll7500);国家自然科学基金资助(30300251)作者简介:蒋正宇(1982一),男,江苏金湖人,硕士,主要从事动物营养与饲料科学研究,E—mai
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