三江平原小叶章湿地生态系统对氮磷的净化效率

Abstract

Abstract: An area（about 1 600 m²） of Deyeuxia angustifolia wetland in Sanjiang Plain was selected to study the function of wetland ecosystems purifying environmental N and P pollutants.Results show that the N and P removal rates presented a rather steady trend during the vegetation growth and maturation periods,and the average removal rate was 85.62% and（85.94）%,respectively.The accumulated concentration of NH⁺₄-N was significantly correlated with TN in the water body of the wetland.Input concentration,mowing and runoff all affected the purification function of the wetland and distribution of N and P.The removal rate decreased with the increase of input concentration and also with mowing.Limited runoff played little role in removing N and P.In a word,the purification efficiency of the Deyeuxia angustifolia wetland ecosystem in Sanjiang Plain was remarkable.The total removal rate of N and P reached 97.97% and 99.05%,respectively.

Key words: Sanjiang Plain, Deyeuxia angustifolia, wetland ecosystem, purification, N, P, removal rate

CLC Number:

X703

XU Hong-Wei, WANG Xiao-Ke, OU Yang-Zhi-Yun. Nitrogen and phosphorous removal efficiency of Deyeuxia angustifolia wetland ecosystem in Sanjiang Plain[J]. Journal of Ecology and Rural Environment, 2005, 21(4): 38-42.

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Nitrogen and phosphorous removal efficiency of Deyeuxia angustifolia wetland ecosystem in Sanjiang Plain

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