氮添加及林下植被去除对沙地樟子松人工林土壤呼吸的影响

氮添加及林下植被去除对沙地樟子松人工林土壤呼吸的影响Title: Effects of Nitrogen Addition and Understory Vegetation Removal on S

氮添加及林下植被去除对沙地樟子松人工林土壤呼吸 的影响 Title:EffectsofNitrogenAdditionandUnderstoryVegetation RemovalonSoilRespirationinaPinussylvestrisvar.mongolica PlantationonSandySoil Abstract: Soilrespiration,anessentialprocessinthecarboncycle,plays acrucialroleinunderstandingtheenergyandnutrientdynamics offorestecosystems.Thisstudyinvestigatedtheeffectsof nitrogen(N)additionandunderstoryvegetationremovalonsoil respirationinaPinussylvestrisvar.mongolicaplantationonsandy soil.TheresultsshowedthatNadditionsignificantlyincreasedsoil respiration,whileunderstoryvegetationremovalhadno significanteffect.Thesefindingsemphasizetheimportanceof consideringNdepositionandvegetationmanagementinthe managementofthisplantationtooptimizecarbonsequestration andecosystemsustainability. 1.Introduction Soilrespirationisasignificantcomponentofthecarboncycle inforestecosystems,accountingforasubstantialproportionof thetotalecosystemrespiration.Itistheprocessbywhich microorganismsdecomposeorganicmatter,releasingcarbon dioxide(CO2)intotheatmosphere.Understandingthefactorsthat controlsoilrespirationiscrucialforpredictingtheresponseof forestecosystemstoenvironmentalchanges.Twokeyfactors affectingsoilrespirationinforestsarenitrogendepositionand understoryvegetation. 2.Methodology 2.1StudySite ThestudywasconductedinaPinussylvestrisvar.mongolica plantationlocatedonsandysoil.Theplantationwasestablishedin 2005andhasauniformmanagementhistory. 2.2ExperimentalDesign