河岸缓冲带不同植被配置对铵氮去除效果研究

在沈阳市郊浑河和蒲河两岸开展不同植被配置方式下，开展河岸植被缓冲带对地表径流中铵氮污染消减研究。结果表明：河岸植被缓冲带越宽，水中铵氮浓度越高，其对地表径流中铵氮的消减作用越明显；天然植被比人工植被能更好的去除铵氮污染物；当污染浓度升高时，林草混合配置的植被带对铵氮表现出较好的消减率；人工林草地和天然林草地对铵氮的平均消减率分别为31％和25．9％，最高消减率分别为57．9％和63．3％，最高消减率均发生在7m宽度河岸带上，而人工林地对铵氮的消减效果较差。实验结果能够应用于指导自然河岸带的生态保护与人工河岸植被带的建设。

Researches on Removal Efficiency of Ammonium Nitrogen Pollutant of Different Vegetation Configuration of Riparian Buffer Strips

The reduction rate of ammonium nitrogen pollutant is investigated in riparian of Shenyang Hun River and Pu River. The results show that the elimination rate of the riparian vegetation buffer strips is higher when more wide vegetation zone and higher concentration of pollutants. The reduction rate of natural vegetation is better than the artificial vegetation to remove pollutants. With the concentration of pollutants increasing,the mixed vegetation configured by forest and grass shows better elimination rate of ammonium nitrogen. For artificial and natural turf,the average elimination rates of ammonium nitrogen are 31% and 25.9%. The maximum reduction rates are 57.9% and 63.3%. The maximum elimination rate appeared in the width of riparian belt 7 re;while the plantation reduction of ammonium nitrogen is low efficiency. So the riparian vegetation buffer zone should be protected and planted in good plan in the future. These results can be used for the natural rioarian zone of ecological orotcction and construction of artificial riparian vegetation zones.