以MHA-FA為蛋氨酸源對生長豬最佳蛋氨酸與蛋加胱氨酸比的研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文以MHAFA為蛋氨酸源對生長豬最佳蛋氨酸與蛋加胱氨酸比的研究姓名：馮占雨申請學(xué)位級別：碩士專業(yè)：動物營養(yǎng)與飼料科學(xué)指導(dǎo)教師：譙仕彥20060601AbstractTwoexperimentswasconductedtodeterminetheoptimalratiooftrueilealdigestiblemethioninetomethioninepluscystineforgrowingpigsusingme

2、thioninehydroxyanalogfreeacid∞methionineSOUrceSThebiologicaleffectivenessofmethioninehydroxyanalogfreeacidrelativetoDLmethionineinthisexperimentwasinvestigatedforgrowingpigsTwepeatedNbalancetrialswereconductedusingatotal

3、of42barrows(LargeWhitexLandrace)Theinitialbodyweightwas】1732105埏inthefasttrialand1369士148kinthesecondIneachtrial，basedonbodyweights，21pigswererandomlyassignedtooneofsevendietarytreatmentswiththreeobservationspertrealment

4、PigwasfedseparatelyThedietsincludedamethioninedeficientbasaldietandothersixdietsformulatedwithgradedlevelsofDLmethionineorMHAFAaddedonanequimolarbasisEachtriallasted12daysconsistingofanadaptationperiodof7daysfollowedby5d

5、aysoftotalcollectionofurineandfecesDuringthecollectionperiodpigswerefedquantitativelydailyPigsreceivingtheexpedmentaldietsachievedhigherdailygainandlowerfeedconversionratethanthosereceivingthebasaldietwhileateachsimilari

6、nclusionlevel，thetreatmentwithaddedDLmethioninewassuperiortothecorrespondingtreatmentwithaddedMHAFATheconcentrationofplasmaureanitrogenforpigsreceivingsupplementalmethioninesourcesregardlessofform，waslowerthanpigsreceivi

7、ngthebasaldietForeachtreatmentNretentionwashigherthanthebasaldiet，whileurinaryNproductiondecreasedmarkedlycomparedwiththebasaldietAnexponentialmodelwasusedtodeterminethebiocffieacyofMHAFArelativetoDLmethionineTheresponse

8、sfittedwelltheexponentialregressionCUlW髂MHA—FAwasestimatedtobe732％船effectiveasDLmethionineforNretentionand456％forplasma蝴nitrogenonaneqnimolerbasisInthesecondexperimentbasedontheresultofthefirstexperimentwascarriedouttoin

9、vestigatetheoptimalratiooftrueilealdigestiblemethioninetomethioninepluscysfineforgrowingpigsusingmethionineh#roxyanalogfreeacidasmethioninesourcesTwepeatedNbalancetrialsWereconductedusingatotalof42baITOWS(LargeWhitexLand

10、race)Theinitialbodyweightwas20364122lcginthefirsttrialand2354士102kginthesecondIneachtrial，basedonbodyweights，21pigswererandomlyassignedtooneofsevendietarytreatmentswiththreeobservationspertreatmentPigwasfedseparatelyThed

11、ietsincludedamethionineandcystinedeficientbasaldiet(TreatI】andsixdietsformulatedwithgradedlevelsofmethioninehydroxyanalogandLCystine’HCI‘H20(Treat11一V11)addedonanequalamountsofsulphuraminoacidbasis，Theratiosoftrueilealdi

12、gestiblemethioninetomethioninepluscystinewere3125，3783，4442，5100，5758and64，17％fromtreatlltotreatVII，respectivelyEachtriallasted12daysconsistingofanadaptationperiodof7daysfollowedby5daysoftotalcollectionofurineandfecesDur