2种耐寒生态浮床植物的水质改善性能研究

引种了2种陆地湿生的耐寒植物——黄菖蒲和西伯利亚鸢尾作为生态浮床植物，以水生美人蕉为对比，进行了水质改善实验研究。在6个月实验期内，黄菖蒲、西伯利亚鸢尾和美人蕉（5个月）对SRP的平均去除速率分别为79.27、20.92和34.29 mg/（m²?d），对TP的平均去除速率分别为86.92、24.91和36.6 mg/（m²?d），对NH⁺₄-N的平均去除速率分别为517.54、170.57和274.07 mg/（m²?d），对TN的平均去除速率分别为763.79、301.81和384.04 mg/（m²?d）。黄菖蒲年去除磷的量21 207.64 mg/（m²?a），是西伯利亚鸢尾的2.6倍，是美人蕉的3.8倍；年去除氮的量186 365.78 mg/（m²?a），是西伯利亚鸢尾的1.9倍，美人蕉的3.2倍。黄菖蒲和西伯利亚鸢尾耐寒能越冬，生长期长，管理工作量小。

Study on water quality improvement capacity of two cold-resistant floating bed plants

Two cold-resistant hydrophytes—Iris pseudacorus L.and Iris sibirica were introduced as floating bed plants to compare with Canna indica for water quality improvement experiment.The average pollutant removal rate for Iris pseudacorus L.,Iris sibirica and Canna indica during the experiment for six months(five months for Canna indica) were 79.27,20.92 and 34.29 mg/(m2·d).respectively for SRP,86.92,24.91 and 36.6 mg/(m2·d) for TP,517.54,170.57 and 274.07 mg/(m2·d) for NH+4-N,and 763.79,301.81 and 384.04 mg/(m2·d) for TN.The removed total phosphorus within one year by Iris pseudacorus L.is 21 207.64 mg/m2,which is 2.6 times of that by Iris sibirica and 3.8 times of that by Canna indica.The removed total nitrogen within one year by Iris pseudacorus L.is 186 365.78 mg/m2,which is 1.9 times of that by Iris sibirica and 3.2 times of that by Canna indica.Iris Pseudacorus L.and Iris sibirica can live through the winter,with a long growth period and minimum management demand.