上海松江耕层土壤有机碳空间分布及影响因素

Influencing Factors of Topsoil Organic Carbon and Its Spatial Distribution in Songjiang District of Shanghai

土壤耕层有机碳及碳储量的变化已经成为全球变化中碳循环研究的重要问题。本文采用上海市松江区第二次土壤普查资料估算松江农田耕层土壤有机碳、有机碳密度及有机碳库。结果显示:上海市松江区农田耕层土壤有机碳密度含量为31.22 tC.hm-2:有机碳库含量为177.15×105t;水稻土有机碳密度及有机碳库在研究区占有很重要的比重,因此,在上海市松江区农田耕层土壤中,保护水稻土有很重要的意义。

Carbon storge and sequestration of topsoil was considered to be an important issue in the study of terrestrial C cycling and global climatic change.In this paper,the evaluation was carried out based on the data from the second national survey of Songjiang by the topsoil organic carbon density and organic carbon pool.The result showed that the topsoil organic carbon density in Songjiang was 31.22tC·hm-2,the content of cultivated soil organic carbon pool was 177.15×105t.The organic carbon density and organic carbon pool of paddy field took an important account on studying area.This research indicated that there was an important significance on protecting paddy field in topsoil of Songjiang.