土壤碳库是地球系统中重要的碳储存系统.利用青海多目标区域地球化学调查获得的有机碳数据,根据土壤类型、土地利用类型和成土母质计算表层土壤有机碳储量和密度,探讨了土壤有机碳储量和密度分布规律.从土壤类型看,高山草甸土中有机碳密度最高,灌淤土有机碳密度最低.从土地利用类型看,人工草地土壤有机碳密度最高,荒草地土壤最低;从成土母质看,以残坡积物为母源的土壤有机碳密度最高,以冲洪积物和黄土为母源的土壤有机碳密度基本相同.分析结果对于利用土地进行固碳,具有重要的指导意义.%According to the soil type, land using type and parent materials, Organic carbon density and storage of surface soil were calculated based on organic carbon data of surface soil from Huangshui River Basin in multi-purpose regional geochemical survey of Qinghai Province. The distribution of organic carbon density and storage were discussed. From the soil type, the organic carbon density of alpine meadow soil is the highest and the organic carbon density of irrigation silting soils is the lowest. From the Land use type, the organic carbon density of soil in Artificial Grassland is the highest, and the organic carbon density of soil in grassland is the lowest. From the parent materials, the organic carbon density of soil in residual de-posits is the highest, and the organic carbon density of soil in alluvial and loess is basically the same. This research results, have important directive to carbon fixation.
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