长江三角洲地区土壤无机碳库研究

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

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∶250000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/m2。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/m2;潮土无机碳密度分别为1.17、8.54、15.37 kg/m2。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。

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 ARCGISg. 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.