| 黑麦草在净化富营养化水的人工湿地生态工程中的作用 |
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| 引用本文： | 牛晓音,葛滢,常杰,关保华,徐青山.黑麦草在净化富营养化水的人工湿地生态工程中的作用[J].湿地科学,2004,2(3):202-207. |
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| 作者姓名： | 牛晓音 葛滢 常杰 关保华 徐青山 |
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| 作者单位： | 1. 浙江大学生命科学学院,浙江,杭州,310012;山东理工大学资源与环境工程学院,山东,淄博,255049
2. 浙江大学生命科学学院,浙江,杭州,310012
3. 杭州市环境保护局,浙江,杭州,310007 |
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| 基金项目： | 国家自然科学基金资助项目(30370146)
欧盟资助项目(ERBIC18CT960059)。 |
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| 摘 要： | 在人工湿地生态工程中利用黑麦草(Lolium perenne L．)净化污水，得到了较好的效果。结果表明：利用黑麦草在冬春季节的生长，可使亚热带地区人工湿地常年运行，黑麦草在3—4月份对水体就有明显的净化作用。在春夏季节，特别在5月份黑麦草可以获得较高的生物量和N、P的积累量，因而净化贡献最大。从产草量方面考虑，延长黑麦草的生长期能获得较高的生物量；从植物体所含营养物质状况和饲用价值看，增加收割次数的黑麦草N、P含量高，饲用价值高；但从黑麦草对污水中N、P的吸收和积累量方面考虑，收割次数过高则不利于黑麦草对污水的净化及N、P的累积。从上述几方面综合考虑，在黑麦草整个生长期收割次数以2．3次为宜。
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| 关 键 词： | 人工湿地 富营养化水 净化污水 净化作用 加收 生态工程 水体 月份 累积 亚热带地区 |
| 文章编号： | 1672-5948(2004)03-202-06 |
| 修稿时间： | 2003年3月23日 |
The Role of Lolium perenne in Constructed Wetland Ecological Engineering for Eutrophicate Water Purification |
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| U Xiao-Yin,CHANG Jie,GE Ying,GUAN Bao-Hua,XU Qing-Shan.The Role of Lolium perenne in Constructed Wetland Ecological Engineering for Eutrophicate Water Purification[J].Wetland Science,2004,2(3):202-207. |
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| Authors: | U Xiao-Yin CHANG Jie GE Ying GUAN Bao-Hua XU Qing-Shan |
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| Abstract: | order to purify the waste water, we set up a pilot system of the constructed wetland (CW) at the entrance of Xihu Lake from Longhong Creek, Hangzhou, China. The CW, 18m long, 9m wide and 1.2m deep, consists of two plots, A and B, and the sizes of both plots A and B are 9m long and 9m wide. The sub-stratums of wetland were sands and gravel, on which Lolium perenne Linn was planted from winter to spring. In fact, there were two stages in plot A and B in the whole treating process of water purification, plot A was the first stage and with the aerobic process mainly, plot B was the second stage, which could purify the outflow of plot A again, with the anaerobic process mainly. We examine the dynamic of growth and nutrient element (nitrogen and phosphorus) absorption of L. perenne in CW as well as the effect of harvest on N and P absorption in eutrophic water after one year operation with varies hydraulic loading rates (200 -1 200 mm/d) , so as to evaluate the role of L. perenne in the constructed wetland.Lolium perenne was planted on November, and harvested on May next year. During the whole growth period, the plants were sampled randomly every half a month. The plant samples were weighted and dried. The total nitrogen and phosphorus in plant were determined by Ultra-violet absorptiophotometric method and vanadium - molybdenum blue method respectively.The growth of L. perenne could keep CW operating perennially at the subtropical region and it obviously purified the wastewater between March and April. In Spring and Summer, the biomass of L. perenne kept increasing, especially in May, L. perenne could obtain very high biomass. Analysis of variance showed significant differences (P<0.05) in biomass between two plots of the CW. The N and P accumulation in plant showed the same trend as the biomass.It was found that the growth period of L. perenne could be prolonged by improve the harvest times, that would obtain high mass and N and P content. But too many harvest times may be inappropriate to the effect of purification wastewater and the accumulation of element when both purifications and crop yield were counted. Considered above all aspects, L. perenne should be harvested completely from the middle of April to the beginning of May and harvest 2-3 times during its growth period.In the application, the CW can be used to beautify and forest the environment around the green strip of life zone, feedlot, square, etc. Also, the L. perenne can be used to produce forage. This ecological engineering was well worth popularizing for its economical and ecological value. |
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| Keywords: | lium perenne constructed wetland ecological engineering waste water purification |
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