23933.草地狼毒化感作用途徑與強(qiáng)度的研究

1、分類號(hào)S812學(xué)校代碼10129UDC574學(xué)號(hào)08204046草地狼毒化感作用途徑與強(qiáng)度的研究TheStudyonStellerachamaejasmeAllelopathicWayStrength申請(qǐng)人：王慧學(xué)科門類：農(nóng)學(xué)學(xué)科專業(yè)：草業(yè)科學(xué)研究方向：草地生態(tài)與管理指導(dǎo)教師：衛(wèi)智軍教授論文提交日期：二〇一一年五月TheStudyonStellerachamaejasmeAllelopathicWayStrengthAbstractSt

2、ellerachamaejasmeisanimptantpoisonousplantofgrasslwidelydistributedinsysteppetypicalsteppegrassldegradation.Stellerachamaejasmehasbecomeamajconstructivespeciesdominantspeciesinseveredegradationofthegrassl.Overgrazingisth

3、emainreasonthatgrassldegradation.InthedegradationofgrassthatStellerachamaejasmewasdominantspeciesitscompetitiveencroachmentisalsoanimptantfactthatledtograssldegradation.Inthispaperallelopathiceffectsoftheaqueousextractsr

4、esiduedecompositionrootexudatestheaqueousofrhizospheresoilonMedicagosativawerestudiedbybioassaymethodsinlab.ThewayofStellerachamaejasmereleasingallelochemicalswasdefined.Thestudyonallelopathiceffectsonseveralreceptplants

5、findoutthedifferentplantallelopathyonchamaejasmeshowedadifferentintensityofthestateouttwoplantsthatresistanttheallelopathyofStellerachamaejasme.TheexperimentthatStellerachamaejasmerootsinthesoildecompositionatdifferentti

6、mesduringthegrowthofMedicagosativaprovedthestrengthofStellerachamaejasmeallelopathyvariation.Theresultsshowedasfollows.1Allelopathiceffectsoftheaqueousextractsresiduedecompositionrootexudatestheaqueousofrhizospheresoilon

7、Medicagosativaweretestedbybioassaymethods.ThewayofStellerachamaejasmereleasingallelochemicalswasdefined.Itiswaterleachingresiduedecompositionrootexudate.2AllelopathicinhibitionstrengthofStellerachamaejasmeonMedicagosativ

8、aOnobrychisviciaefoliaConillaVariaMelilotusSuaveolensfourkindsoflegumesisstrongerthanontheAgropyroncristatumAgropyronmongolicumElymusdahuricusPsathyrostaehysperinnesBromusinermiLoliumperenneSixperennialgrasses.3Allelopat

9、hiceffectsofrootsstemsofStellerachamaejasmeondifferentreceptplantswasvarying.FMedicagosativaOnobrychisviciaefoliaConillaVariaMelilotusSuaveolensfourlegumestheallelopathicinhibitionofStellerachamaejasmerootswasverysignifi

10、canttheallelopathicinhibitionenhancedwiththeincreaseofrootsbiomass.TheinhibityeffectofStellerachamaejasmestemsleavesisweakrelativelybutwhentheamountofstemsleavesincreaseditalsoinhibitedthegrowthoffourkindsoflegumessignif