13792.毛烏素沙地沙芥屬植物沙芥和斧形沙芥幼苗定居機制和水分生理的研究

1、分類號S647學校代碼10129UDC635.1學號2010202036毛烏素沙地沙芥屬植物沙芥和斧形沙芥幼苗定居機制和水分生理的研究SeedlingEstablishmentMechanismWaterPhysiologyResearchPuioniumP.cnutumP.dolabratumPlantMuUsSanl申請人：寶音德力格爾學科門類：農學學科專業(yè)：蔬菜學研究方向：蔬菜種質資源與種質創(chuàng)新指導教師：王萍副教授論文提交日期：二

2、〇一三年六月SeedlingEstablishmentMechanismWaterPhysiologyResearchPuioniumP.cnutumP.dolabratumPlantMuUsSanlAbstractPugioniumIsaveryimptantshrubspeciesfsvegetableinhabilitationinInnerMongoliaofInnerMongoliaAutonomousRegionChinaf

3、itshighecologicaleconomicvalues.PugioniumcnutumPugioniumdolabrotumisitstwospecies.Theygrewupinaridregion.SosoilmoisturecontentonthemustardPuioniumGaertnsettledinthesadaptationisveryimptantbasedonthesoilmoisturecontentofP

4、uioniumGaertnsettledinfluencestudyplants.（1）Puioniumplantsrootelongationrateisgreaterthanthesbedfmationrate，therefe，thelocaldistributionoftherootsoftheplantshouldhavecrespondingmphologicalplasticityPuioniumgrowthbiomassi

5、nvestmentyoungPuioniumplantsresponsetodifferentsoilmoisturecontentsimulatedrainfallmobiledunegrowingseasonwiththefluctuationrulesofsoilmoisturecontentintheearlyofgrowingseason，Puioniumplantsseedlingsaremelikelytosettlein

6、sdunesifthereisnosufficientfollowuprain，afterthegerminationofseedlingsonthetopofthesdunesleewardslopedlelowerpartsettledmedifficult.（2）TheexperimentalresultsshowedthatseedofP.cnutumP.dolabrotumcouldgerminatein2%~20%theso

7、ilwatercontent，suitablesoilwatercontentwas6%~12%，thesoilwatercontent，suitablesoilwatercontentwas6~8%，SeedofP.cnutumP.dolabrotumcouldemergein2%~20%thesiolwatercontent，suitablesoilmoistureofP.cnutumP.dolabrotumemergencewer

8、e6%~8%P.cnutumP.dolabrotumseedlingsbiomassat6%~8%8%soilwatercontentweresignificantlyhigherthanthatofothertreatments，ratioofroottoshootofP.cnutumP.dolabrotumreachedmaximumat2%8%thesoilwatercontent，Soilwatercontentofabovet

9、he2%，bothP.cnutumP.dolabrotumcanbegerminateunearth.TheP.cnutum’sgerminaterateemergencerateslightlyhigherthanP.dolabrotum.TheresultsshowedthatPugionoumplantshavestrongadaptabilitytothesyenvironment，butadaptabilityofP.cnut

10、umwasstrongerthanP.dolabrotum.（3）DifferentleafagePugioniumcnutumPugioniumdolabrotumseedlingsnaturalsaturationdeficitcriticalsaturationdeficitofdifferenceislargefincreasedwithleafnumber，fthesameleafnumberPugioniumcnutumPu