【摘要】 基于重庆市第二次土壤普查的1411个土壤剖面数据,结合重庆市土壤图、土地利用现状图和行政区划图,在地理信息系统技术的支持下,对重庆市土壤有机碳密度及储量进行了估算,同时引入有机碳丰度指数这一指标,对有机碳在不同土壤、不同区域以及不同景观中的分布特征进行了分析。结果表明:重庆市20cm和100cm深度的土壤有机碳储量分别为0.27Tg和1.0Tg;20cm深度的土壤有机碳密度介于0.33～30.36kg/m2之间,100cm深度的土壤有机碳密度介于1.27～72.69kg/m2之间;重庆市土壤有机碳库在不同土壤、不同区域以及不同景观的分布具有高度的空间变异性,100cm深度的土壤、区域和景观有机碳丰度指数分别为0.58～1.95,0.55～1.39和0.46～1.58,与气候、植被、人类活动等因素密切相关。更多还原

【Abstract】 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 2.73×10¹¹ kg and 9.76×10¹¹ kg, respectively. Carbon density of 100 cm soil ranges from 0.33³0.36 kg/m², and carbon density of 20 cm soil range from 1.27⁷2.69 kg/m²; 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 0.58¹.95, 0.55¹.39 and 0.46¹.58 respectively.更多还原