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Lu J.,CAS Institute of Subtropical Agriculture | Lu J.,Taoyuan Station of Agro ecology Research | Lu J.,University of Chinese Academy of Sciences | Liu J.-B.,CAS Institute of Tibetan Plateau Research | And 8 more authors.
Chinese Journal of Applied Ecology | Year: 2014

In order to investigate the impact of drying process on greenhouse gas emissions and denitrifying microorganisms in paddy soil, wetting-drying process was simulated in laboratory conditions. N2O flux, redox potential (Eh) were monitored and narG-and nosZ-containing denitrifiers abundances were determined by real-time PCR. N2O emission was significantly increased only 4 h after drying process began, and it was more than 6 times of continuous flooding (CF) at 24 h. In addition, narG and nosZ gene abundances were increased rapidly with the drying process, and N2O emission flux was significantly correlated with narG gene abundance (P<0.01). Our results indicated that the narG-containing deniteifiers were the main driving microorganisms which caused the N2O emission in the short-time drought process in paddy soil.

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