泰和烏骨雞生長期（0-12周齡）可消化蛋氨酸需要量及幾種常見蛋白質(zhì)飼料氨基酸消化率的研究.pdf

1、江西農(nóng)業(yè)大學碩士學位論文泰和烏骨雞生長期（012周齡）可消化蛋氨酸需要量及幾種常見蛋白質(zhì)飼料氨基酸消化率的研究姓名：熊玲玲申請學位級別：碩士專業(yè)：動物營養(yǎng)與飼料科學指導教師：瞿明仁2003.5.1StudiesontheDigestibleMethionineRequirementsofTaiheSilkyFowlsinEarlyStage(0～12weeksofage)andtheTrueDigestibilitiesofAminoA

2、cidsinSeveralProtienIngredientswithTaiheSilMFowlsABSTRACTTherearetwopartsinthisstudyExperiment1：Agroupedfeedingtrial，nitrogenbalancetrialandmetabolismtrialforTaihesilkyfowlswereconductedtostudytheeffectsofdietarymethioni

3、nelevelsonperformance，nitrogenretentionratioandserumureanitrogenconcanUation，anddeterminethetotalanddigestiblemethioninerequirementsofTaihesilkyfowlsjnearlystageTheresuItsshowedasfollowing：(1mietaryMetlevelshadnosignific

4、anteffectonweightgam(WG)(p005)butfeedintake(F1)，feedconversionrate(FCR)andserumuleanirogenconcentrationweresignificantlyimprovedasdietaryMetlevelincreased(2)WiththeincreaseofdietaryMetlevels，nitrogenretentionrateofTaihes

5、ilkyfowlssignificantlyincreased，butexcessmemioninereducedthenitrogenretention(3)thereweresignificantdifferencesinmethioninerequirementsbetweenmaleandfemaleTalhesilkyfowlsandthemetnioninerequirementsofmaleswerehigherthant

6、hatoffemalesTaihesilkyfowlsat412weeksofageTheresultssuggestedthatduring04weeksthetomlanddigestiblemethioninerequirementsofTaihesilkyfowlsfedonadiet(1924％crudeprotein，metabolizableenergy1226MJ／kgand026％supplementalmethion

7、ine)wasO44％and041％ofdietarylevels，respectivelyDuring4“9weeks，basedonadiet(1737％crudeprotein，metabolizableenergy1226MJ／kgand023％supplementalmethionine)thetotalanddigestiblemethioninerequirementsofmaleTalhesilkyfowlswas035

8、％and033％ofdietarylevels，respectively；thefemale’swas031％and030％，mspectivlyDuring912weeks。fedonadiet(1700％crudeproteinmetabolizableenergy1227MJ／kgand022％supplementalmethionine)thetotalanddigestiblemethioninerequirementsofm

9、aleTaihesilbfowlswas026％and025％ofdietarylevelsrespectively；thefemale’swasO24％and023％respectivlyExperiment2：60maleandfemaleTaihesilkyfowlsr9and12weeksofage)respectivelywereemploiedtodeterminedthetruedigestibilitiesofamino

10、acids(TDAAlinfishermeal(FM)，soybeanmeal(SBM)，rapeseedmeal氓SM)andcoHonseedmeal(CSM)，andtheeffectsofageandsexofTaihesilkvfowlsonthedigestibilityco伍cientsofaminoacidsin蹦，SBM，RSMandCSMwerestudiedwithTaihesilkyfowlsTheresults

11、showedthatexceptforSBMtheTDAAiflotherthreeingredientswith9weekoldTaihesilkyfowlsweresignifieantlyhigherthanthatof12weekoldThihesilkyfowls(p005)TheTDAAinCSMweresignificantlyinfluencedbytheSexofTaihesilkyfowls(p001)andtheT

12、DAAinCSMwithmalechicksweresignificantlylowerthanthatoffemalechicks；theSeXofTaihesiIkyfowlssignificantlyaffectedthetruedigestibilitiesof4aminoacids(Leu，SerGysandTys)inRSM(pO05)andtheTDAAwithmalechickswerehigherthanthatoff

13、emalechicks；buttheSeXofTalhesilkvfowlshadnosignificanteriectontheTDAAinSBMandFM，BetweensexandageofTathesill(vfowls，therewasasignificantinteractiveeffectontheTDAAofLys，His，TrpandGysinSBM，andofGys，TysinCSM(pO，05)TheageandS