基于遥感数据产品的亚热带地区土壤有机碳储量评估以长株潭绿心区为例

——以长株潭绿心区为例

ssessent ofSoil Organic Carbon Storage in Subtropical Regins Based on Remote SensingData Products：A Case Studyof Chang sha-Zhuzhou-Xiangtan Green Heart Region

CHEN Zhu123，XIAOHai23，QUAN Si-xiang12etal（1.HunanSecond SurveyingandMaping Institute，Changsha，Hunan 41000；2.HunaEgineingReseachCnterfitgofturalEosteCarboSinks，anshaunan3Kbto ofNaturalResoucsoitogandSupervsinoutHlleasofteistryofaturalResoucs，Cangsha，Hun4

AbstractTakingthecoreareaofChangsha-Zhuzhou-XiangtanGren HeartCentralParkastheresearchobject，basedonon-sitecoleted dataincludingslnicarbodatultispetralotesigdataigialatioodels（E），eteorologicaldata（iiati andtemperatre），landaalchangesureydataandothruiliarydtautiplelinearegresionmodels，tepwseregressioodels andrandom forest models were selected to invert and evaluate the organic carbon density and storage in the cm surface and profile，respectivelyTecuacfecsofetiatioesulsofdfetodeletoseompredndepoceofchlue cingfactorwasanalyzed.Teresultshowedthatherandomforestmodeldemonstratedtheighestaccracyiestimatingteorganicarbon density of 0-20 cm surface soil （ ），with significant factors including surface reflectance in the blue light band，elevation，water flow intensityindexteiditydededulaestepsegodelowdestccacyiiatinghe file soil organic carbon density（ ），with significant factors including elevation，water flow intensity index，terrain undulation，greennessindex，oldgetatiodex，soladstedgeatiodedeagtmperature.eatialdistrtioaef 0- 20cm surfacesoiloganiarbonensityoincidewiththspatialdistribtionoftudulatidicatingsignificantiueneft topographyontedistrbutionofsurfacesoilrganicarboneseves.Teorderofufacesoilorganicarbondnsityfromhighesttolowestamong different land use types in the study area was forest land > paddy field > orchard land > grassland > dry land.

Key WordsRemote sensing data products；Soil organic carbon density；Soil organic carbon storage；Subtropical region

陆地生态系统中，土壤是最大的碳库，约 81.2% 的碳贮存在土壤中[1]，全球 1m 深度的土壤中储藏的有机碳量约1500Gt ，相当于大气二氧化碳中碳的2＼～3倍[2]，土壤对碳固持有很大的潜力。（剩余9027字）