| 城市地区重建湿地的生态过程研究 |
| 摘要点击 4955 全文点击 2194 投稿时间：2005-12-08 修订日期：2006-04-17 |
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| 中文关键词 湿地重建 生态过程 营养元素 水生植物 水质 |
| 英文关键词 wetland creation ecological process nutrient macrophyte water quality |
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| 中文摘要 |
| 研究了湿地重建过程中植物、土壤和水质的动态变化特征.湿地重建2 a后植物种类增加了11种，芦苇、菖蒲和香蒲3种植物的高度、生物量在第2个生长季明显高于第1个生长季节，植物生物量分别增加到原来的13、1.5和1.4倍.湿地种植区土壤有机质总体上是降低的，土壤全氮含量从1?500 mg/kg降低到850 mg/kg（p＜0.01），土壤全磷在试验期间略有增加.对重建湿地12种水质指标分析表明，夏季湿地出口源水溶解氧高于进口源水，出口源水总氮、叶绿素a、藻类计数3种水质指标均低于进口源水，说明重建湿地水质在夏季出口源水优于进口源水，水质得到改善.研究表明，湿地植物群落重建成功，生物多样性增加，重建湿地在改善和保持源水水质方面发挥了一定的作用. |
| 英文摘要 |
| The dynamics of physical, chemical and biological processes was researched in an urban created wetland in Tianjin. The result showed that all introduced macrophytes survived and the aboveground biomass increased 13 fold for Phragmites australis, 1.5 fold for Acorus calamus and 1.4 fold for Typha orientalis, respectively. And 11 other macrophytes were occurred in the basin. For the nutriments in the sediment, the organic matter decreased, total Kjeldahl nitrogen significantly decreased from 1?500 mg/kg to 720 mg/kg（p＜0.01）, and total phosphorus slightly increased in created wetland. 12 parameters of the water quality were determined. The water quality was improved in summer season, since dissolved oxygen increased, and other parameters, such as total nitrogen, chlorophyll a, and the number of algae decreased from inflow to outflow. The study indicated that the biodiversity naturally increated in created wetland. The created wetland played a role for the stand and improvement of water quality. |
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