Based on the data of multipurpose regional geochemical survey ( central area of Guiy-ang ) (1∶250 000) in Guizhou province, the distribution of carbon density and carbon storage are studied in the central area of Guiyang City. Major conclusions are as follows:(1) The av-erage value of total carbon density of surface, middle and deep of soils are respectively 0. 68 × 104 t/km2 ,2. 22 × 104 t/km2 and 3. 15 × 104 t/km2 , and they are higher than that of other prov-ince such as Sichuan and Hunan, while its total carbon storage are respectively 0. 16 × 109 t, 0. 53 × 109 t and 0. 76 × 109 t . (2) The organic carbon density of soils was higher in the study area, and the organic carbon storage accounted for about 90% of the total carbon storage, which indicated that the organic carbon is extremely rich and the land is more fertile, and it is suitable for the agricultural production. (3) The organic carbon density of soils varies with dif-ferent soil types, land-use types and ecosystems. (4) Within the region (0-1. 8 m), the in-organic carbon density is 0. 31 × 104 t/km2 , and the inorganic carbon storage is 0. 08 × 109 t, which only accounted for 10% of the total carbon content. The study results would provide a scientific basis for the research on soil carbon circulation, the assessment of environmental effect and agricultural production.%利用贵州省多目标区域地球化学调查(贵阳中心区)(1∶250000)成果,对贵阳中心区土壤碳密度和碳储量分布特征进行了研究,主要取得如下成果：(1)贵阳中心区表层、中层和深层土壤全碳密度平均值分别0.68×104 t/km2、2.22×104 t/km2、3.15×104 t/km2,高于四川、湖南等其他省区,全碳储量分别为0.16×109 t、0.53×109 t、0.76×109 t；(2)研究区土壤有机碳密度较高,有机碳储量占全碳储量约90%,表明有机碳极为丰富,土地较肥沃,适宜于农业生产；(3)土壤有机碳密度随土壤类型、土地利用方式及生态系统的不同而存在一定差异；(4)区内(0~1.8 m)无机碳密度平均值为0.31×104 t/km2,无机碳储量为0.08×109 t,仅占总碳量的10%.研究成果可为碳循环研究、生态环境影响和农业生产提供科学依据.
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