湿地土壤及其生态功能

湿地土壤是构成湿地生态系统的重要环境因子之一。在湿地特殊的水文条件和植被条件下 ,湿地土壤有着自身独特的形成和发育过程 ,表现出不同于一般陆地土壤的特殊的理化性质和生态功能 ,这些性质和功能对于湿地生态系统平衡的维持和演替具有重要作用。因此 ,在湿地的诸多定义中有很多都将湿地土壤作为划分湿地的一条重要标准2 ,4 ] 。近年来 ,湿地研究中较多地涉及湿地生态系统的生物因子 ,但对湿地土壤的研究则鲜见报道。本文简要介绍了我国湿地土壤的类型特点及其生态功能 ,以期引起湿地工作者对湿地土壤的关注。1　湿地土壤的基本类型湿…

Wetland Soil and Its Ecological Functions

Types and characteristics of wetland soil were briefly introduced, and ecological functions of soil in wetland ecosystem were also discussed in this paper. Wetland soils can be divided into five types, including histosol,gleysol,halomorphic soil,paddy soil and underwater soil, containing higher organic matter and situated in intense reduction circumstance. Because of their special physical and chemical properties, wetland soils showed varied ecological functions such as (a) to be as a medium of wetland living things ;(b) to provide nutrients; (c) to release greenhouse gases and (d) to purify or absorb toxic substances in wetland ecosystem.