中文摘要：

土壤溶解性有机碳（DOC）是有机碳库的活跃组分，在陆地生态系统碳循环中发挥重要作用．本文从碳循环重要性着手，综述了土壤DOC在土壤碳固持与温室气体排放中的作用；结合我国的现实情况（如土壤酸化、气候变暖等），探讨了土壤DOC的相关影响因素、如土壤性质、环境因素、人为活动对土壤DOC的影响及作用机制，对进一步理解土壤DOC在陆地生态系统碳循环与温室气体减排中的作用具有重要意义．

英文摘要：

Soil dissolved organic carbon （DOG） is an active lractlon o5 SOll organic camon pool, playing an important role in the carbon cycling of terrestrial ecosystems. In view of the importance of the carbon cycling, this paper summarized the roles of soil DOC in the soil carbon sequestration and greenhouse gases emission, and in considering of our present ecological and environmental problems such as soil acidification and climate warming, discussed the effects of soil properties, environmental factors, and human activities on the soil DOC as well as the response mechanisms of the DOC. This review could be helpful to the further understanding of the importance of soil DOC in the carbon cycling of terrestrial ecosystems and the reduction of greenhouse gases emission.