摘要湿地生态系统的服务价值和功能使人类生活环境质量得到很大的提高。随着城市发展越来越快，出现了一系列城市环境问题，湿地的价值和功能也越来越受到重视，湿地的保护和修复问题也越来越受人们的关注。杭州西溪湿地国家公园作为城中次生湿地，集城市湿地、农耕湿地、文化湿地三位一体，具有重要的生态价值。面对其生态环境的恶化，对西溪湿地生态系统的修复极为迫切。我们通过对西溪湿地池塘进行水生生态系统修复，实验发现处理组2（水生植物+鱼）的效果对鱼塘的水体的溶解氧含量具有显著的提升作用，其与空白组（无任何处理）之间P=0。029<0。05,差异显著。空白组与处理组在BOD5和COD之间差异P=0<0。01，差异极其显著，说明养鱼和种植水生植物可以显著减少鱼塘水体的还原性物质和有机物质含量，改善鱼塘水体的污染。74996

 AbstractThe value of service and function of wetland ecosystem have greatly improved the quality of human living environment。 With the rapid development of the city, a series of urban environmental problems have appeared, the value and function of the wetland has been paid more and more attention, and the protection and restoration of the wetland is more and more concerned by people。 Hangzhou Xixi National Wetland Park is a rare secondary wetland in a city , as a secondary wetland in the city, it set the city wetlands, agricultural wetlands, cultural wetlands Trinity, which has an important ecological value。 Facing the deterioration of the ecological environment, the restoration of XiXi Wetland ecosystem is extremely urgent。 Through the aquatic ecosystem restoration of Xixi wetland pond, the results show that the effect of dissolved oxygen content in treatment group 2 (aquatic plants and fish) in fish pond water has a significant role in enhancing the water, which is difference significantly P=0。029<0。05 ,between the blank group (without any treatment) and treatment group。 Blank control group and the treatment group between BOD5 and COD in the difference P=0<0。01, is extremely significant difference, which prove that fish  farming and planting of aquatic plants can significantly reduce the reducing substances and organic matter content in the fish pond water and improve the pollution fish pond water。

毕业论文关键词：湿地；西溪湿地；湿地保护；湿地修复

Key Words ：Wetland; Xixi Wetland; Wetland protection; wetland restoration 

目录

1．引言 4

1。1湿地概述 4

1。2湿地生态恢复的概念 4

1。3生态恢复的目标和原则 4

1。4生态修复方法 5

2．研究区域概况 5

2。1 地质地貌 6

2。2气候特征 6

2。3水文特征 6

2。4土壤特征 7

3．研究内容和方法 7

3。1研究内容 7

3。2 研究方法 7

3。2。1 溶解氧（DO） 8

3。2。2  温度（T） 8

3。3。3  pH值 8

3。3。4 化学需氧量（COD） 9

3。3。5  生物需氧量（BOD） 9

3。数据处理与分析 9

3。1 pH值分析