摘要
Background:Forestbiomassishelpfultoassessitsproductivityandcarbon（C）sequestrationcapacity.Severaldisturbanceactivitiesintropicalforestshavereducedthebiomassandnetprimaryproduction（NPP）leadingtoclimatechange.Therefore,anaccurateestimationofforestbiomassandCcyclingincontextofdisturbancesisrequiredforimplementingREDD（ReducingEmissionsfromDeforestationandForestDegradation）policy.Methods:BiomassandNPPoftreesandshrubswereestimatedbyusingallometricequationswhileherbaceousbiomasswasestimatedbyharvestmethod.Finerootbiomasswasdeterminedfromsoilmonolith.TheCstockinvegetationwascalculatedbymultiplyingCconcentrationtodryweight.Results:Totalstandbiomass(Mg?ha-1)inundisturbedforeststand（US）was960.4whileindisturbedforeststand（DS）itwas449.1.Thebiomass(Mg?ha-1)oftrees,shrubsandherbsinUSwas948.0,4.4and1.4,respectively,whileinDStheywere438.4,6.1and1.2,respectively.TotalNPP(Mg?ha-1?yr-1)was26.58(equivalentto12.26MgC?ha-1?yr-1)inUSand14.91(6.88MgC?ha-1?yr-1)inDS.TotalCinputintosoilthroughlitterplusrootturnoverwas6.78and3.35Mg?ha-1?yr-1inUSandDS,respectively.Conclusions:Severaldisturbanceactivitiesresultedinthesignificantlossinstandbiomass（53%）,NPP（44%）,andCsequestrationcapacityoftropicalforestineasternNepal.Thenetuptakeofcarbonbythevegetationisfargreaterthanthatreturnedtothesoilbytheturnoveroffinerootandlitter.Therefore,bothstandsofpresentforestactascarbonaccumulatingsystems.Moreover,disturbancereflectshigherCemissionswhichcanbereducedbybettermanagement.
出版日期
2016年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
