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土壤中的有机碳主要储存在表层中,分析农田土壤有机碳密度和储量,既可以为提高土壤肥力服务,也可为农田土壤固碳潜力的估算提供依据。本文以第二次土壤普查图、土地利用变更图和GIS技术为基础,通过土壤样品采集、分析,估算了江西省农田表层土壤的有机碳密度和储量,并与第二次土壤普查结果进行了比较。结果表明:江西农田表层土壤平均有机碳密度为3.8391 kgm-2、有机碳储量为109759.9823×106kg,与第二次土壤普查时相比,农田表层土壤有机碳密度增加了0.21 kgm-2,在相同农田面积的状况下,土壤有机碳储量增加了6167.92×106 kg。
Organic carbon in soil is mainly stored in the surface layer. Analyzing organic carbon density and reserves in farmland can not only improve soil fertility, but also provide basis for estimation of carbon sequestration potential in farmland. Based on the second soil survey, land use change map and GIS technology, this paper estimates and analyzes the organic carbon density and storage of the surface soil of farmland in Jiangxi Province through the collection and analysis of soil samples. The results of the second soil survey Compare The results showed that the average organic carbon density in surface soil of farmland in Jiangxi was 3.8391 kgm-2, and the organic carbon storage was 109759.9823 × 106 kg. Compared with the second soil survey, the organic carbon density in the topsoil increased by 0.21 kgm-2. Under the condition of farmland area, the soil organic carbon storage increased by 6167.92 × 106 kg.