中南大学学报（自然科学版）2017，Vol.48Issue(11)：2859-2865,7.DOI:10.11817/j.issn.1672-7207.2017.11.003
4种湿地植物对复合垂直流人工湿地N2O排放的影响
Effect of four kinds of wetland plants on N2O emission from integrated vertical constructed wetland
摘要
Abstract
Four kinds of wetland plants namedAcorus calamus L,Canna indica L,Scirpus validus Vahland Cyperus alternifolius L were cultivated to evaluate N2O from integrated vertical constructed wetlands with static chamber-gas chromatograph. The results show that TN removal efficiencies for four plants are basically similar. TN removal efficiency increases from August and then decreases. The lowest TN removal efficiency is obtained in December and January. The best TN removal efficiency of these four kinds of wetlands is 77.98% when planted withCyperus alternifolius L.N2O emissions fromAcorus calamus L, andScirpus validus Vahl are higher from downflow tanks than that from upflow tanks.But N2O emissions from Canna indica L is lower from downflow tanks than that from upflow tanks.Cyperus alternifolius L has the highest average N2O emission of162.80 μg/(m2·h), followed byAcorus calamus L of 99.35μg/(m2·h),Canna indica L of84.62 μg/(m2·h) and Scirpus validus Vahlof82.56 μg/(m2·h). The integrated vertical constructed wetland is the resource of N2O emission, and integrated vertical constructed wetland planted withScirpus validus Vahl shows weak absorption in the second half of December.KTN/N2O (the ratio of TN removal efficiency to N2O average flux) ofAcorus calamus L,Canna indica L andScirpus validus Vahlchanges significantly with time compared to Cyperus alternifolius L, which shows the lowerKTN/N2O.KTN/N2Ois lower whenAcorus calamus Land Canna indica L are in the first half of November,Scirpus validus Vahl in the first half of December, which means they release lower N2O than that in other time when they remove the same TN content.Acorus calamus L andCanna indica Lare more favorable for the integrated vertical constructed wetland.关键词
复合垂直流人工湿地/湿地植物/N2O排放通量Key words
integrated vertical constructed wetland/wetland plant/N2O emission分类
资源环境引用本文复制引用
蒋旭瑶,田云飞,黄德英,郑潇威,祝栋林,张继彪..4种湿地植物对复合垂直流人工湿地N2O排放的影响[J].中南大学学报（自然科学版）,2017,48(11):2859-2865,7.基金项目
国家自然科学基金资助项目(51308127) (Project(51308127) supported by the National Natural Science Foundation of China) （51308127）
