The work of estimate
soil organic carbon storage is very important to the research of carbon cycle. The soil organic carbon
density and
storage of Chongqing municipality was estimated based on the data of 1411 soil profile of Chongqing from the second soil survey of China, using the soil map (1∶250000), land use status quo map and district map of Chongqing. With the index of soil organic carbon enrichment, the soil organic carbon distribution characteristic in different type soil, different district and different sight are analysed. Result showed: the
soil organic carbon storage of Chongqing to the depths of 100 cm and 20 cm were 2.73×10~(11) kg and 9.76×10~(11) kg, respectively. Carbon density of 100 cm soil ranges from 0.33~30.36 kg/m~2, and carbon density of 20 cm soil range from 1.27~72.69 kg/m~2; The amount of soil organic carbon varied significantly at different soil types, districts and sights, and significantly is affected by the climate, vegetation and human activity, the index of soil organic carbon abundance of soil, district and sight of 100 cm depth were between 0.58~1.95, 0.55~1.39 and 0.46~1.58 respectively.