长江三角洲地区土壤无机碳库研究

土壤碳库变化对于全球温室效应、全球碳循环有重大的影响。研究基于最新完成的1〖DK〗∶250 000多目标地球化学调查及相关研究成果，运用地理信息系统软件ARCGIS 92、统计分析软件SPSS130，对长江三角洲地区0~20、0~100、0~180 cm深度土壤无机碳密度及储量做出实测统计。长江三角洲地区0~20、0~100、0~180 cm深度土壤无机碳库储量分别为5099、35647、67726Tg，无机碳密度分别为070、490、930 kg/m2。研究区主要分布土壤为水稻土、潮土，水稻土0~20、0~100、0~180 cm深度土壤无机碳密度分别为057、385、886 kg/m2；潮土无机碳密度分别为117、854 、1537 kg/m2。研究提供最新的土壤无机碳库实测统计信息，弥补中国区域土壤无机碳库清单的空白，完善了中国区域土壤碳库清单，为研究中国区域土壤碳固定潜力、深入全面理解区域碳循环提供了基准数据.

STATISTICAL CALCULATION OF SOIL INORGARIC CARBON STOCK IN THE YANGTZE DELTA REGION

Soil carbon stock plays an essential role in global greenhouse effect and global carbon circulation. This paper statistically calculated soil inorganic carbon stock and soil inorganic carbon density for 0～20,0 ～100,0～180 cm depth in the Yangtze Delta region based on 1:250 000 multi-purpose regional geochemical survey and interrelated research by ARCGIS9.2 and statistical software SPSS13.0. The soil inorganic carbon stocks for 0～20,0～100,0～180 cm depth are 50.99,356.47,677.26 Tg,and the soil inorganic carbon density are 0.70,4.90,9.30 kg/m~2,respectively. Paddy soil,as main soil type, its inorganic carbon density for 0～20,0～100,0～180 cm depth are estimated as 0.57,3.85,8.86 kg/m~2,respectively. Fluvo-aquic soil, as secondary soil type,its inorganic carbon density are 1.17,8.54,15.37 kg/m~2. The lately statistical data in this paper makes contribution as baseline dada to evaluate regional carbon sequestration potential and to understand carbon circulation thoroughly.