在GIS技术支持下,建立安徽省土壤数据库,揭示安徽省土壤有机碳密度空间分布特征。结果表明:安徽省0~100 cm土体中土壤有机碳密度在0.92~40.97 kg/m2之间,均值为10.39 kg/m2;从空间分布上看,从北向南有机碳密度逐渐增加,有机碳密度大部分在3~19 kg/m2之间,其分布面积占总面积的89.72%;在各土壤类型中山地草甸土有机碳密度最大,而潮土、黄褐土、石质土有机碳密度较小;草地的有机碳密度最大,耕地最小;土壤有机碳密度与海拔高度之间存在高度相关,随着坡度、降雨量的增加,平均有机碳密度逐渐加大。
Based on GIS technique, soil database and spatial distribution patterns of soil organic carbon density of Anhui was established. The relationships between the soil organic carbon density and land use, soil type, terrain factors were investigated. The results showed that the range of soil organic carbon density is between 0.92 kg/m2 and 40.97 kg/m2 in 0-100 cm profile depth, average 10.39 kg/m2. The range of soil organic carbon density was mainly between 3 kg/m2 and 19 kg/m2, which accounts for 89.72% of the total area. The maximum value of soil organic carbon density is in mountain meadow soil and the minimum is in fluvo-aquic soil, yellow cinnamon soil and lithosol in different soil types. The maximum is in forestland, minimum is in the farmland in different land uses; soil organic carbon density had the high correlation with elevation. The mean soil organic carbon density gradually increased with slope and rainfall. Soil organic carbon density increased from north to south in Anhui Province.
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