中文摘要：

稻田湿地土壤由于淹水时间长，具有积累更多有机碳潜能，其积累的有机碳呈现明显表层聚集趋势。介绍了稻田湿地土壤有机碳固定现象、原因，并从微团聚体、杂草及微生物多样性等方面对其机制进行了初步探讨及展望。

英文摘要：

Paddy wetland soils have high potential to accumulate organic carbon because of long - time waterflooding, and show an obvious tendency of topsoil organic carbon accumulation. This paper introduced the phenomenon and causes of soil organic carbon sequestration in paddy wetlands, and discussed its mechanism from the aspects of micro - aggregates, weeds, microbe biodiversity and so on.