| 长江中游地下水水位变化对氮输出的影响研究 |
| Research on effects of different groundwater depth on nitrogen exporting in the middle reaches of Yangtze River |
| 投稿时间：2013-01-02 修订日期：2013-03-18 |
| DOI： |
| 中文关键词:地下水 氮 硝化 反硝化 输出 |
| 英文关键词:groundwater nitrogen nitritation denitrification export |
| 基金项目:国家自然科学基金（51149005，51209150） |
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| 摘要点击次数: 2070 |
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| 中文摘要: |
| 河岸带地下水水位的变化将使河岸带土壤、水文条件与化学物质迁移之间的关系发生变化。通过模拟长江洪湖河岸带水位变化情况,研究不同地下水水位变化对氮输出的影响,考虑因素为潜水埋深,试验作物为牛精草(Eleusine indica),共设4个处理,研究不同地下水埋深条件下的水质情况。结果表明,不同处理条件下各形态氮的浓度均有不同程度升高,以处理III的氨态氮增加最多,为0.30mg/L;处理II硝态氮增加最为显著,为0.37mg/L;干湿交替能够引起氨化的突然加强,同时伴随着硝化的骤然加强和NO3--N的暂时积累。相同植被条件下,地下水埋深越浅,NO3--N更易造成地下水环境的污染。在湿润地区,尤其是渔业养殖较多的区域,氨态氮也是地下水污染中的重要贡献者。 |
| 英文摘要: |
| With the dramatic changes of groundwater in riparian zone the relationship between soil，hydrological conditions and the migration of chemical substances has been changed. This paper studies the effects of different changes of groundwater level on exporting nitrogen by stimulating the situation of water level changes in the Yangtze Honghu river. This paper analyzed the transportation characteristic of nitrate in groundwater under different ground-water depth on soil and groundwater environment. Four types of experiments were set in the study by setting two groundwater level and two vegetations. The results showed that the concentration of various forms of nitrogen would increase to different extent in different treatment condition. In types III，NH＋4-N increased 0. 30 mg/L compared with that of the initial condition. N0－3一N increased 0. 37 mg/L compared with that of the initial condition in types III. The alternating of dry and humidity can caused ammoniation suddenly，meanwhile accompanied by suddenly strengthening nitration and N0－3一N temporary accumulation. Preliminary，we think that the risk of nitrate polluted groundwater increased in the same vegetation in shallow groundwater level. In moist area，especially in the region that fishery culture is in large scale，ammonia nitrogen is also an important contributor in groundwater pollution. |
| 杨启红,张慧婷,胡望斌,汪红军.2013.长江中游地下水水位变化对氮输出的影响研究[J].水生态学杂志,34(2):1-6. |
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