侵蚀逆境下土壤有机碳的迁移

Soil erosion and carbon cycling

土壤有机碳是陆地碳库的重要组成部分。土地利用和土地覆盖变化使得土壤中有机碳的含量发生很大的变化。土壤侵蚀是陆地碳库衰减的主要动力之一,也是陆地碳汇与海洋碳汇相互作用的重要过程。文章对土壤活性有机碳以及不同土地利用方式对土壤有机碳的影响作了介绍。

Soil organic carbon is a significant component of the earth抯 carbon reservoir. In recent years, soil organic carbon content changes quickly because of the change in human-induced land use and land coverage. Soil erosion is one of the main dynamics that result in the decrease in the terrestrial carbon reservoir. This paper reviewed the studies of soil labile carbon and the effect of different land uses, especially soil erosion on soil organic carbon. It estimates that severe soil erosion may lose 75%~80% of the organic carbon. At present, it is difficult to understand the trail of the losing organic carbon.