土地利用对湿地土壤活性有机碳的影响研究进展

Research progress on influence of land use on wetland soil active organic carbon

湿地生态系统土壤碳库的周转及碳源/汇过程对全球气候变化起着极其重要的作用,而土壤碳库中的活性碳组分对环境因子变化响应最为敏感,湿地土壤活性有机碳在湿地土壤碳、氮、磷等养分元素的生物地球化学循环方面起着十分重要的作用。不同的土地利用方式对湿地土壤活性有机碳组分的特征分布影响显著,综述了土壤活性有机碳内涵、组分及土地利用方式变化对湿地土壤活性有机碳多种组分的影响研究进展,展望不同土地利用方式下湿地土壤活性碳库的未来研究方向,并提出今后应加强不同土地利用方式下湿地生态系统土壤活性碳库与土壤微生物及土壤酶活性的关系研究,以期为评估湿地生态系统碳源/汇功能提供理论基础。

Soil active organic carbon（SAOC） is an important part of wetland soil organic pool and plays an important role in the biogeochemical cycle of carbon,nitrogen and phosphorus in wetland soils.The response of wetland SAOC on the change of environmental factors is sensitive and land-use type significantly affects the content and turnover rate of wetland SAOC.The conception,fractions of SAOC and research progress on influence of land use on wetland SAOC were summarized in this paper,and the future studies on soil active carbon pool of wetland under different land-use types were prospected,such as studies of the relationship between wetland soil active organic carbon pool and microbial/enzymatic activity should be strengthened in the future,in order to provide theoretical basis of evaluating the wetland ecosystem carbon source/sink fuction.