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土地管理和利用方式对喀斯特坡地土壤有机碳组分和养分的影响.docx

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土地管理和利用方式对喀斯特坡地土壤有机碳组分和养分的影响 Title:TheImpactofLandManagementandUtilizationonOrganicCarbonCompositionandNutrientContentofKarstSlopeSoils Abstract: Karstlandscapesarecharacterizedbytheiruniquegeologicalformationsandrichbiodiversity;however,theyalsoposechallengesforlandmanagementandutilization.Thisstudyaimstoinvestigatetheinfluenceofdifferentlandmanagementandutilizationpracticesontheorganiccarboncompositionandnutrientcontentofkarstslopesoils.Thefindingsdemonstratetheimportanceofsustainablelandmanagementpracticesinpreservingsoilfertilityandpromotingecosystemresilienceinkarstareas. 1.Introduction: Karstslopesareoneofthemostvulnerablelandscapestosoilerosionanddegradationduetotheiruniquegeologicalcharacteristics.Thequalityandcompositionofsoilorganiccarbon(SOC)andnutrientcontentplayavitalroleindeterminingsoilhealthandfertility.ThisstudyexplorestheimpactofvariouslandmanagementandutilizationpracticesonSOCcompositionandnutrientcontentinkarstslopesoils. 2.Methodology: 2.1StudySiteSelection: Severalkarstslopesiteswithdifferentlandmanagementandutilizationpracticeswereselectedasstudysites.Theseincludedagriculturalland,forestedland,andabandonedland. 2.2SampleCollectionandAnalysis: Soilsampleswerecollectedfromeachsiteatdifferentdepths,andtheSOCcompositionandnutrientcontentwereanalyzed.TheSOCcompositionwasdeterminedusinganalyticaltechniquessuchasFourierTransformInfrared(FTIR)spectroscopyandsolid-stateC-13nuclearmagneticresonance(NMR)spectroscopy.Nutrientcontentwasmeasuredusingstandardlaboratoryprocedures. 3.ResultsandDiscussion: 3.1EffectsofAgriculturalLandManagement: Agriculturallandmanagementpractices,suchasintensivetillageandexcessiveuseofchemicalfertilizers,werefoundtohaveasignificantimpactonSOCandnutrientcontent.Hightillageintensityledtoincreasedsoilerosion,resultinginthelossofSOC.Furthermore,excessivefertilizerapplicationscausedimbalancesinnutrientcontents,leadingtothedegradationofsoilfertility. 3.2EffectsofForestedLandManagement: Forestedlandmanagementpractices,includingaffore