施肥對短花針茅草原土壤氮礦化速率、肥力及植被的影響.pdf

1、分類號S153.6學校代碼10129UDC631.4學號2012204019施肥對短花針茅草原土壤氮礦化速率、肥力及植被的影響EffectofFertilizationonSoilNitrogenMineralizationRate，F(xiàn)ertilityVegetationintheStipabreviflaDesertSteppe申請人：張佳鑫學科門類：農(nóng)學學科專業(yè)：土壤學研究方向：草原土壤利用與保護指導教師：紅梅教授論文提交日期：二〇

2、一五年六月EffectofFertilizationonSoilNitrogenMineralizationRate，F(xiàn)ertilityVegetationintheStipabreviflaDesertSteppeAbstractIndertostudytheeffectsoffertilizationonsoilnitrogenmineralizationsoilfertilityvegetationindesertsteppeth

3、eapplicationofNPKothersfertilizationsinInnerMongoliaBaotouCityDamaoBannerXilamurendegradeddesertthisstudythrough20112012.EffectsofFertilizationonFertilizeronStipabrevifladesertsteppesoilnitrogenmineralizationratesoilvege

4、tation.Theresultsshowed：(1)NfertilizerPNPfertilizationsignificantlyincreasedtheNmineralizationrateofDesertificationGrassl(NPN10N5PN2.5CK).PfertilizerNPN10fertilizationcanincreasesoilnitrogenfixationreducenitrogenlosstoth

5、edangerousenvironment.(2)NfertilizerNPNPKfertilizationcanimprovethecontentofganicmattertotalNofdesertsteppesoil.PfertilizerPKfertilizerNPNPKfertilizationcanincreasesoiltotalPavailablePcontent.KfertilizerthecontentofNKNPK

6、fertilizationcouldsignificantlyincreasethesoiltotalKavailableK.(3)N10NPNPKtreatmentplantcommunityPielouindexSimpsonindexwassignificantlyincreasedcomparedtocontrol.TheplantcommunitydiversityindexwithShannonWienercontrolha

7、simprovedbutnotsignificantly.(4)Fertilizationimprovedplantcommunityindesertgrasslbiomassplantheight.NPKfertilizationcouldimprovetheplantheightofdesertsteppe.NPfertilizationcouldmaketheplantabovegroundbiomassincreasedsign

8、ificantlyespeciallytheAsteraceaeChenopodiaceaePlants.NKfertilizationcouldmaketheplantcommunityundergroundbiomasswassignificantlyincreased.LongtermapplicationofN10fertilizercancausetheplantlitterwassignificantlyreduced.(5