【作者】 纪庆亮；

【导师】 陈昕；

【作者基本信息】 南京林业大学 ， 植物学， 2010， 硕士

【摘要】 菹草（Potamogenton crispus）、西伯利亚鸢尾（Iris sibirica）、美人蕉（Canna glauca）是三种具有一定耐寒性水生植物,在水生态修复中极具开发利用价值,本文对三种植物的NH₄-N耐受性和冬季净水效果进行了研究,以期为北方寒冷季节水生植物生态修复提供理论和实践技术指导。三种水生植物NH₄-N耐受性和冬季净水效果研究主要结果有以下5个方面。（1）三种水生植物均具有很好的NH₄-N耐受能力,适合作为净化水质及水体生态修复的物种。菹草、西伯利亚鸢尾、美人蕉的NH₄-N耐受范围分别为0²mg/L、0¹0mg/L和0²0mg/L。（2）水体中NH₄-N浓度超过4mg/L时会对菹草有直接的胁迫效应,超过20mg/L时会对西伯利亚鸢尾有直接的胁迫效应,超过40mg/L时会对美人蕉有直接的胁迫效应,胁迫效应会随时间延长而加重。（3）三种水生植物在冬季低温条件下均能较好的净化水质,净水效果:菹草>美人蕉>西伯利亚鸢尾>对照（CK）。（4）主要水体污染物的去除率:NH₄-N>TN>NO₃-N>TP>COD,菹草、美人蕉、西伯利亚鸢尾系统对NH₄-N的净去除率分别为:84.58%、76.25%和75.83%;对TN的净去除率分别为:54.06%、44.76%和44.58%;对NO₃-N的净去除率分别为:44.90%、42.29%和40.30%;对TP的净去除率分别为:40.43%、29.78%和19.15%;对COD的净去除率分别为:35.47%、26.46%和26.46%。（5）通过对各个植物处理水质净化效果显著性差异分析,各植物处理组水质与对照（CK）相比均达到了显著性差异,可见植物在净化水质方面起到了很重要的作用。更多还原

【Abstract】 Potamogenton crispus Iris sibirica and Canna glauca are three Cold-resistance water plants. They are three hydrophytes which offer very high potential for exploitation in water ecological restoration. The NH₄-N tolerance range and water purification in winter were studied. This study can provide theories and technique support for water ecological restoration.In the study of NH₄-N tolerance range and water purification in winter about this three water plants. We found five main results as follows:（1） The results indicates this three water plants have good abilitys to NH₄-N stress. They are three good water purification species in water ecological restoration. NH₄-N tolerance range of Potamogenton crispus、Iris sibirica and Canna glauca are 0²mg/L、0¹0mg/L and 0²0mg/L.（2） The results showed that high NH₄-N concentration culture solution have a direct stress effects to this three water plants and the effects accentated as time goes on. Potamogenton beyond its tolerance when NH₄-N concentration culture solution above 4mg/L. Iris sibirica beyond its tolerance when NH₄-N concentration culture solution above 20mg/L. Canna glauca beyond its tolerance when NH₄-N concentration culture solution above 40mg/L.（3） This three water plants have a good effect on water purification in winter. The order of their purifying effects is: Potamogenton crispus> Canna glauca >Iris sibirica>CK.（4） The order of their purifying effects to water quality is: NH₄-N>TN>NO₃-N>TP>COD. The pure water purification of Potamogenton crispus、Canna glauca and Iris sibirica to NH₄-N are: 84.58%、76.25% and 75.83%; The pure water purification of Potamogenton crispus、Canna glauca and Iris sibirica to TN are: 54.06%、44.76% and 44.58%; The pure water purification of Potamogenton crispus、Canna glauca and Iris sibirica to NO₃-N are: 44.90%、42.29% and 40.30%; The pure water purification of Potamogenton crispus、Canna glauca and Iris sibirica to TP are: 40.43%、29.78% and 19.15%; The pure water purification of Potamogenton crispus、Canna glauca and Iris sibirica to COD are: 35.47%、26.46% and 26.46%.（5） In the study of their purifying effects to water quality about difference significance analysis. We found the treatment have plants with the treatment without all significant differences. It is indidicates that plants have very important effect on water purification.更多还原