[N and P removal characters of eutrophic water body under planted float].
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% approximately 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 NH4+-N removal rate and NO3(-)-N accumulation. The presence of planted float reduced the release flux of N2O, which was 17.14 microg N x m(-2) x h(-1) for Ipomoea aquatica, 37.38 microg N x m(-2) x h(-1) for Oenanthe javanica, and 85.08 microg N x m(-2) x h(-1) for the control.
Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China. xpzhou@issas.ac.cn
Xiaoping
X
Zhou
Jianguo
J
Wang
Lihong
L
Xue
Xiaofeng
X
Xu
Linzhang
L
Yang
D001673:Biodegradation, Environmental; D005068:Eutrophication; D027741:Ipomoea / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D031050:Oenanthe / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D014867:Water / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000378:metabolism; D018508:Water Purification / Q000379:methods*
D014874:Water Pollutants, Chemical; D014867:Water; D010758:Phosphorus; D009584:Nitrogen