Abstract：
:Constructed wetlands are considered to be important sources of nitrous oxide (N(2)O). In order to investigate the contribution of nitrification in N(2)O formation, some environmental factors, plant species and ammonia-oxidizing bacteria (AOB) in active layers have been compared. Vegetation cells indicated remarkable effect of seasons and different plant species on N(2)O emission and AOB amount. Nitrous oxide data showed large temporal and spatial fluctuations ranging 0-52.8 mg N(2)O m(-2)d(-1). Higher AOB amount and N(2)O flux rate were observed in the Zizania latifolia cell, reflecting high potential of global warming. Roles of plants as ecosystem engineers are summarized with rhizosphere oxygen release and organic matter transportation to affect nitrogen transformation. The Phragmites australis cell contributed to keeping high T-N removal performance and lower N(2)O emission. The distribution of AOB also supported this result. Statistical analysis showed several environmental parameters affecting the strength of observed greenhouse gases emission, such as water temperature, water level, TOC, plant species and plant cover.
journal_name
Chemospherejournal_title
Chemosphereauthors
Inamori R,Wang Y,Yamamoto T,Zhang J,Kong H,Xu K,Inamori Ydoi
10.1016/j.chemosphere.2008.07.064subject
Has Abstractpub_date
2008-10-01 00:00:00pages
1071-7issue
7eissn
0045-6535issn
1879-1298pii
S0045-6535(08)00960-0journal_volume
73pub_type
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