青海海西州海南州放牧綿羊牧草干物質(zhì)采食量的季節(jié)變化.pdf

1、甘肅農(nóng)業(yè)大學(xué)碩士學(xué)位論文青海海西州海南州放牧綿羊牧草干物質(zhì)采食量的季節(jié)變化姓名：馮昕煒申請學(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：鄭中朝張力20050601碩十學(xué)位論文SUMMARYStudy011theseasonalchangeofdrymatterintakeofthegrazingsheepatHaixiandHainanintheQinghaiProvinceFengXinweiMentor：PmEZhengZhong

2、chaoFacultyofscience&technologyofGansuAgriculturalUniversityLanzhou，730070，Oansu，RRChinaSUMMARYbymeansofhandpluckingmethod，entirelyacceptfecesmethod，andtheTill)andTerry’sinvitrodigestiontrials，theforageintakewasmensurate

3、dinHaixiandHainanintheOinghaiprovinceinthewinterspring、summerandautumntheresultswasasfollows：(1)Thesameseasonalchangeofthe。nutritioncontentofgrazingwasfoundinHaixiandHainanstateinQinghaiprovince，ThecontentofCRCEE，DE，MEan

4、dAshinSUmlTlerwerehigherthanthatinautumn，andthecontentinwinter—springwasthelowestinthethreeseason；ThecontentofNDF、ADF、CelluloseandADSinsummerwerehigherthanthatinautumn，andthecontentinwinterspringwasthelowestinthethreesea

5、son2，Thedrymatterdigestbility(DMD)determinedbyTheTillyandTerry’sinvitrodigestiontrialsinthewinterspring、summerandautumninHaixiareawererespectively4596725％、5584O74％and5113243％，whichwassignificantlydifferentrespectively(p0

6、，05)3、Inthewinterspringandautulrln，theCPintakeofthegrazingsheepinHaixiareawereO880039／kgWo75dand088006∥kgWo75d，thatinHainanareawere204009∥kgWo75dand382_0109／kgW。75‘d，whichwerelowerthanthesustainedCPofMerino(1999)；IntileS

7、UlTllTtertheCPintakeofthegrazingsheepinHaixiandHainanareaweremorethan22435％and5535％comparedwiththesustainedCPofMerino(5429／kgWo”‘d)(4)Inthewinterspringandautumn，theMEintakeofthegrazingsheepinHaixiareawere026O，01MJ／kgWo75