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Chinese Journal of Applied Ecology ›› 2005, Vol. 16 ›› Issue (11): 2199-2203.

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N and P removal characters of eutrophic water body under planted float

ZHOU Xiaoping, WANG Jianguo, XUE Lihong, XU Xiaofeng, YANG Linzhang   

  1. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
  • Received:2004-11-23 Revised:2005-05-23 Online:2005-11-15 Published:2005-11-15

Abstract: The study on the N and P removal and N2O release of eutrophic water body under planted float Ipomoea aquatica and Oenanthe javanica showed that planted float had a good effect on the removal of N and P from eutrophic water body.The bioaccumulation of N and P by the plants accounted for 40.32%~63.87% of the N and P removal,respectively,suggesting that plant uptake was the main removal process.Within the treating period,there was a rapid and sufficient nitrification but a slow and insufficient denitrification in the planted float system,and thereby,planted float system had a high NH+4-N removal rate and NO-3-N accumulation.The presence of planted float reduced the release flux of N2O,which was 17.14 μg N·m-2·h-1 for Ipomoea aquatica,37.38 μg N·m2·h-1 for Oenanthe javanica,and 85.08 μg N·m-2·h-1 for the control.

Key words: Eutrophication, Planted float system, N and P, Nitrification and denitrification, Removal, N2O

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