滨海滩涂不同土地利用类型土壤活性有机碳含量与垂直分布

近年来，滨海滩涂已成为人类围垦开发的主要区域。围垦，一方面改变了土壤基本的理化性质，另一方面也加速了土壤有机碳库的变化，特别是对围垦活动比较敏感的活性有机碳，因此研究围垦区不同土地利用类型下土壤有机碳及其活性组分的含量与差异，能够为合理开发利用滨海湿地，了解围垦区的土壤碳循环特征提供参考。

Content and vertical distribution of soil labile organic carbons in different land use types in the tidal flat area

Coastal tidal flats have a high carbon sequestration potential, which may contribute to alleviating the global greenhouse effect.However, they are being reclaimed at an increasing rate because they provide important land for relieving population pressure, promoting regional economic growth, and ensuring food safety. With the largest area of tidal flats in China, a long history of coastal reclamation activities has been existed in Jiangsu Province. Tidal flat reclamation practices change the basic physical and chemical properties of soil, and accelerate changes in the soil organic carbon pool, especially the active organic carbon, which is sensitive to reclamation activities. Meanwhile, the active organic carbon components can be used to characterize the short term changes in the soil organic carbon pool. As such, studying the differences in soil organic carbon and its active components under different land use types in reclamation areas may provide a reference for the rational development and utilization of coastal wetlands. It is also important to elucidate the role of soil carbon in coastal reclamation areas.