湿地系统氮的生物地球化学研究概述

系统地回顾了湿地系统氮的生物地球化学循环的研究进展。在氮的输入与累积方面,概述了湿地的大气干湿沉降、湿地有机氮素的矿化、植物累积与枯落物分解以及氮的湿地迁移转化的过程及影响因素等。分析了湿地氮的硝化、反硝化过程,并对湿地土壤水分、水位、温度、pH、Eh、有机质含量、土壤质地、土壤基质以及植被类型等影响因素进行了深入的分析和讨论。并分析了湿地氮各种存在形态的生态效应,展望和提出了湿地氮生物地球化学研究的方向和重点。

A Review on Nitrogen Biogeochemistry Study in Wetland Systems

A review on the research development of biogeochemical cycle of nitrogen was made. The processes and impact factors of the atmospheric deposition of nitrogen, organism nitrogen mineralization, plant nutrient accumulation and deposition of plant litter and the nitrogen movement in horizon and vertical directions in wetland in the field of input and accumulation of nitrogen were studied. The mechanism and processes of nitrification and denitrification were analyzed and discussed deeply as well as the impact factors, including the factors of soil water content, water body level, temperature, pH, Eh, organism content, soil texture and substrate and the type of plant. The ecological reaction of all kinds of nitrogen in wetlands was analyzed and vistas on future research goal and study emphasis of nitrogen biogeochemical cycle were given.