反刍动物非蛋白氮研究进展

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:20082122183:()(nyhyzx072036206)33,,1983,,:333(,110161);,,,,,,,11.1,2007,1.21.32,80%,26%,50%(Bryant,1961),,,,,Clark(1992),59%[1],,,,,;,[2]9520093,,,33.1,Mills.(1942)[3]McDo2nald(1952):,[4]Hristov(1997)2N2N:,,[5],Herrera2Saldana(1990),,[6],3.2,,,,,3.3,,3.4Bentleyetal.(1954)[7],4NPNNPN,,,,,,,4.1,,,,,,,,,4,,,:,,[8]4.2,,,,,,[9]:,,,,[10]0620093,,,,,5,,,,,:,,[11],75%85%,,6,,,[1]CLARKJH,KLUMSMEYERTK,CAMERONMR.Microbi2alproteinsynthesisandflowsofnitrogenfractiontotheduode2numofdairycows[J].J.DiarySci.,1992,75:2304.[2],,.[J].,2003,121(4):36238.[3]MILLSR.C.,etal.Theutilizationofureabyruminantsasin2fluencedbythepresenceofstarchintheration[J].J.DairySci.,1942,25:9252929.[4]MCDONALDI.W.Theroleofammoniainruminaldigestionofprotein[J].Biochem.J.,1952,51:86290.[5]HRISTOVA.N.,MCALLISTERT.A.,CHENGK.J.Effectofcarbohydratelevelandammoniaavailabilityonutilizationofalphaaminonitrogenbymixedruminalmicroorganismsinvitro[J].Proc.WesternSection,Amer.Soc.Anim.Sci.1997,48:1862189.[6]HERRERA2SALDANAR.,GOMEZ2ALARCAONR.,TO2BRABIM.,etal.Influenceofsynchronizingproteinandstarchdegradationintherumenonnutrientutilizationandmicrobialproteinsynthesis[J].J.DairySci.1990,73:1422148.[7]BENTLEYO.G.,etal.TheeffectoftracemineralsongrowthperformanceandvitaminB12synthesisofsteers[J].J.Anim.Sci.,1954,13:7892801.[8],,..[C].2002:1542159.[9].[M].:,2004.[10],.[J].,1996,8(3):11213.[11]BUTLERWR.Review:Effectofproteinnutritiononovariananduterinephysiologyindairycattle[J].J.DairySci.,1998,81:253322539.226()26,,11,,,1460,1000,,1620093

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