營養(yǎng)水平對羔羊物質消化的影響及羔羊早期斷奶時間的研究.pdf

1、中國農業(yè)科學院碩士學位論文營養(yǎng)水平對羔羊物質消化的影響及羔羊早期斷奶時間的研究姓名：王桂秋申請學位級別：碩士專業(yè)：動物營養(yǎng)與飼料科學指導教師：刁其玉20050601ABSTRACTInthisresearch，suckinglambsatdifferentdaysfedwithmilkreplaeersofdifferentnutritionlevelswcrestudiedOngrowthpc蜘∞ce，nutritionaldiges

2、tibilityandtherelationshipbetweennutritionaldigestibilityandlambs’ageEarlyweanedlambs’blood8ellll!IIindexandearlyweaningtechniquewe∞studiedbyfeedingtestTestl：Twelvesevandayoldmalelambs(TorsetdSmalltailedsheep早)ingoodcond

3、itionwererandomlydividedintothreegroupsLambsofgroupAwerefedwithmilkreplacersoflownutritionlevelGroupBwelefed、聃lhmiⅡcreplacersofmiddlenutritionlevelGroupCwerefedwithmilkreplacersofhighnutritionlevelItlast57daysFeedingtria

4、lshowedasfollowsTheaeWasnoobviousdifferenceamongthosethreegroupsinweightgainwhenfedwithmill【replacersofdiffaentnutritionlevels(PO05)Weight(1(g)oflambsatday1060increaseddirectlinearlywithdays(R與09849)Dallywcightgainofallg

5、roupshadthetrendtoincreasewithnutritionlevel口O05)，nutritiondigestibilitiesincreasedfirstandthendeereasedasnutritionlevelrisingTherewe∞directlylinearcorrelationbcIweellthenutritionutilizationsanddaysoflambs(R2蘭O8453)Theap

6、parentnutritiondigestibilityoflambsincreasedwithdayLambsfedwithmilkrcplaeerofmidnutritionhadthebestnutritionutilizationsConsideringbothgrowthp口f0“∞n∞andnutricaltutilizationanddigestionefficiencymilkreplac口ofmiddlenutriti

7、onlevel，iecontentingCP26％，EE14％、GE19MJ／kg、Ca1480andP0，78％w瞞bestlotlambs協(xié)t2：Inordertoconfirmthebestearlyweanedtimeoflambstheinflueneeofearlyweanedtimeonlambs’growthperformanceandbloods叭m1indexwelestudiedAstestIsixtennlamb