Effects of Macrophyte Rehabilitation on Phosphorus Releasing in Mesocosm Enclosures

BAO Xian-ming

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Effects of Macrophyte Rehabilitation on Phosphorus Releasing in Mesocosm Enclosures

- Effects of Macrophyte Rehabilitation on Phosphorus Releasing in Mesocosm Enclosures
- Bulletin of Soiland Water Conservation Vol. 30, Issue 2, Pages: 68-72(2011)
- 作者机构：
  
  淮北师范大学生命科学学院
- 作者简介：
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- Published：2011
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BAO Xian-ming. Effects of Macrophyte Rehabilitation on Phosphorus Releasing in Mesocosm Enclosures[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 68-72.
DOI：

BAO Xian-ming. Effects of Macrophyte Rehabilitation on Phosphorus Releasing in Mesocosm Enclosures[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 68-72. DOI：

摘要

选取太湖五里湖水生植被生态重建大型围隔(105 m

)为试验区

进行了水质和沉积物内源释放2a的同步跟踪监测。结果表明

围隔内挺水植物区和沉水植物区PO

—P和NH

—N的年平均浓度分别比围隔外对照区下降了54.6%

46.7%和17.1%

13.8%;围隔内水质得到明显的改善。通过室内静态模拟不同实验区沉积物中磷酸根的释放实验

发现围隔内沉水植物区和挺水植物区PO34-—P的释放速率的年平均释放速率分别为0.23±0.42mg/(m

.d)和-0.38±0.65mg/(m

.d)

明显低于围隔外对照区﹝1.13±1.31mg/(m

.d)﹞。因此重建和恢复湖泊水生植物系统能有效抑制内源磷酸盐向水体的释放。

Abstract

Wuli Lake of Taihu Lake region is a typical hyper-eutrophic

shallow lake in China

situated near the Wuxi City in Jiangsu Province.Since January 2004

a large-scale macrophyte restoration experiment(105 m2) was carried out in southwestern Wuli Lake using a large enclosure.The results show that from August 2004 to July 2005 mean concentrations of PO3-4—P and NH+4—N of submerged area and macrophyte area inside the enclosure were 54.6% and 46.7%

17.1% and 13.8%

lower than those of outside enclosure

respectively

implying markedly improved water quality inside the enclosure.Phosphate releasing simulation from the cores collected from different areas in enclosure and outside enclosure was conducted in the laboratory.The resulted showed that the mean phosphorus release rates of the sediment from the submerged area and macrophyte area inside the enclosure were 0.23±0.42 mg/(m2·d) and-0.38±0.65 mg/(m2·d)

respectively

contrasting to 1.13±1.31 mg/(m2·d) outside the enclosure.Overall

rehabilitated macrophyte not only decreased the concentrations of nitrogen and phosphorus

but also controlled the phosphorus release rate of sediments.

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