中文摘要：

介绍了人工湿地系统中植物在污水脱氮方面发挥的重要作用，简述了目前研究中常用的3种湿地植物类型，包括挺水植物、浮水植物和沉水植物；介绍了植物脱氮的主要机理，植物通过吸收利用、根系微生物的硝化反硝化作用，来实现氮的去除，指出不同植物由于生理特性不同，对氮的去除效果不同。通过对比研究不同植物的脱氮效果，总结了人工湿地中植物的配置原则和影响植物脱氮的主要因素。对今后的相关研究方向进行了展望。

英文摘要：

Plants have a great effect on nitrogen removal in constructed wetland treatment system. At present, wetland plants are divided into three types： emergent plant, floating plant and submerged plant. Nitrogen removal by plants includes absorption, nitrification and denitrification of microorganisms in root zone. Due to the diverse physiological characteristics, plants have different effect on nitrogen removal. By comparing nitrogen removal efficiency of different plants, the configuration principle of plants in constructed wetlands and the main factors of plants on nitrogen removal are discussed. In addition, a prospect for future study and relevant suggestions are given.