【摘要】 为指导盐化富营养化水体的生态修复,通过水培实验,研究不同盐度下水葱、再力花、花菖蒲、香蒲、千屈菜5种湿地植物的耐盐能力,并筛选出2种植物进行水质净化效果比较。结果表明:盐胁迫下5种植物均具有一定的耐盐能力,其中以水葱和千屈菜对盐胁迫适应性更强;轻微的盐度(2.5‰)刺激,有利于水葱和千屈菜对氨氮、总氮、总磷的去除;千屈菜在低盐环境下对总磷、氨氮净化效果更好,但不能长时间耐受高于5.0‰的盐度;高盐浓度下(大于5‰)水葱的生长状况和净化效果明显优于千屈菜,对硝氮、总氮、总磷去除率分别达到了39.5%～55.0%、33.6%～38.5%和63.9%～90.2%。0‰～5‰盐度下,水葱和千屈菜均可以作为净化水质的植物;5‰以上盐度时,水葱可以作为盐化富营养水体生态修复的首选植物。更多还原

【Abstract】 To guide ecological restoration of salinized eutrophic water, salt-tolerant abilities of five wetland plants, namely Scirpus validus, Thalia?dealbata, Iris ensata var. hortensis, Typha orientalis and Lythrum salicaria were compared by hydroponic experiments and two plants were finally chosen for water purification effect tests. The results showed that five plants could endure a certain degree of salinity, among which Scirpus validus and Lythrum salicaria were more adaptable to salt stress. A slight salinity(2.5‰) was conducive to the removal of ammonia nitrogen, total nitrogen and total phosphorus. The removal rates of phosphorus and ammonia nitrogen of Lythrum salicaria were higher under low salinity, but got worse at salinities above 5.0‰. Under higher salinity, Scirpus validus grew better, whose removal rates of nitrate nitrogen, total nitrogen and phosphorus were 39.5%～55.0%, 33.6%～38.5% and 63.9%～90.2% respectively. Under 0‰～5‰ salinity, Lythrum salicaria and Scirpus validus could be used as alternative plants to purify water. Scirpus validus was the better choice in remedying eutrophic water above 5.0‰ salinity.更多还原