Denitrification-dependent anammox activity in a permanently flooded fallow ravine paddy field
文献类型: 外文期刊
第一作者: Zhou, Sheng
作者: Zhou, Sheng;Borjigin, Sodbilig;Riya, Shohei;Hosomi, Masaaki;Borjigin, Sodbilig
作者机构:
关键词: Anammox;Chlorate;Denitrification;Nitrate;Nitrite;Paddy soil
期刊名称:ECOLOGICAL ENGINEERING ( 影响因子:4.035; 五年影响因子:4.611 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: It is vital to understand the nitrogen dynamics in ravine paddy fields due to their nitrogen removal capacity, providing a potential method for non-point source pollution treatment. This study measured bacterial anaerobic ammonium oxidation (anammox) and denitrification activity using a nitrogen isotope pairing technique (IPT) in fallow ravine paddy soil that is permanently flooded with seepage water from an upland vegetable field. The inhibition experiment explored the correlation between anammox activity and the denitrification processes, using chlorate to inhibit the first step of denitrification. Denitrification activity decreased with increasing paddy soil depth; with anammox activity showing a similar trend, but with even greater declines in activity. In addition, when nitrate reduction to nitrite was inhibited, anammox activity exponentially decreased, likely to be due to a reduction in the intermediate NO2-. Furthermore, the rate of reduction in anammox activity was significantly greater than the reduction in denitrification. This study presents the first direct exploration of the correlation of denitrification with anammox activity in ravine paddy fields receiving nitrate polluted water. (C) 2016 Elsevier B.V. All rights reserved.
分类号: Q14`X171
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