基于遙感數(shù)據(jù)產(chǎn)品的亞熱帶地區(qū)土壤有機(jī)碳儲量評估以長株潭綠心區(qū)為例

——以長株潭綠心區(qū)為例

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

陸地生態(tài)系統(tǒng)中，土壤是最大的碳庫，約 81.2% 的碳貯存在土壤中[1]，全球 1m 深度的土壤中儲藏的有機(jī)碳量約1500Gt ，相當(dāng)于大氣二氧化碳中碳的2＼～3倍[2]，土壤對碳固持有很大的潛力。（剩余9027字）