摘要：自20世纪60年代起，国内外学者们相继进行了利用高等水生植物进行污水净化的实验，近年来，由于环境变化水体污染问题已经刻不容缓，利用水生植物净化水体成为一种高效低耗的途径。本次实验为研究菖蒲在含盐废水中的光合特性及其去除氮的能力，实验设计了6个组分别对照，采用无土培养的方式对含盐及含氮废水条件下菖蒲的生长状况进行研究。各个组中育苗液的含氮与含盐量各不完全相同并可以相互形成对照。比如植株在含盐浓度相同条件下不同浓度氮时的生理状况及光合特性。研究结果表明，在2%盐浓度的环境条件下，净光合速率明显下降，含氮量低的植株比含氮量高的植株在各方面生理性状上更好，但随着实验的进行，含盐的几组试验由于叶绿素的缺失，水分及元素吸收功能的失去，光合作用趋近于0，但对氮的去除能力影响并不是很大。41387
毕业论文关键词：菖蒲；NaCl；含盐废水；光合特性
Research on the effect of Iris’s nitrogen removal capability and photosynthetic characteristics in salt wastewater
Abstract: Since the 1960s, domestic and foreign scholars have been carried out using higher aquatic plant wastewater purification experiment, in recent years, due to changes in water pollution has been pressing environmental problems, Utilization of aquatic plants purify water become an efficient and low consumption. The experiments for the study of the iris photosynthetic characteristics in saline wastewater and its ability to remove nitrogen, the experimental design of the six groups were controlled manner using soilless culture on growth and nitrogen iris under saline water conditions the study. Each group of nitrogen and salt content of each seedling was not exactly the same and can be contrasted with each other. For example, plants containing salt under the same conditions and photosynthetic  
characteristics of different physiological conditions when the concentration of nitrogen. The results show that, at a 2% concentration of environmental conditions, the net photosynthetic rate decreased, low nitrogen content of plants better than the high nitrogen content of the plants in the various aspects of physiological traits, but with the progress of the experiment, including several groups of experimental salt due to the lack of chlorophyll, water absorption and loss elements, photosynthesis tends to 0, but the ability to remove nitrogen not great.
Keywords：Iris；NaCl；saline wastewater；photosynthetic characteristics
目 录
1绪论    1
1.1 研究背景    1
1.2我国水体富营养化现状    1
1.3水体富营养化来源    1
1.4水生植物    2
1.4.1挺水植物    2
1.4.2实验材料介绍    2
1.5水生植物的净化机理    2
1.5.1 水生植物的自身性状及其抗性能力    3
1.5.2 水生植物的吸收，富集作用    3
1.5.3水生植物的沉降、吸附和过滤作用    3
1.6运用水生植物进行水体净化的研究进展    3
1.6.1 对氮、磷等营养物质的去除    4
1.6.2 对污水中盐的去除    4
1.7国内外研究进展    4
1.8选题意义    4
2 研究内容与试验方法    6
2.1 试验材料与处理    6
2.1.1 试验材料与试验条件    6
2.1.2 试验时间及地点    6
2.1.3 试验主要应用仪器    6
2.1.4 试验主要应用试剂    6
2.2 试验方案    6
2.2.1 试验设计    6
2.2.2 NACL、NH4-H处理表：    8 含盐废水对黄菖蒲光合特性及去除氮能力的影响:http://www.751com.cn/shengwu/lunwen_41433.html