[Effect of short-time drought process on denitrifying bacteria abundance and N2O emission in paddy soil].
Ying Yong Sheng Tai Xue Bao
; 25(10): 2879-84, 2014 Oct.
Article
em Zh
| MEDLINE
| ID: mdl-25796895
ABSTRACT
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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Base de dados:
MEDLINE
Assunto principal:
Solo
/
Microbiologia do Solo
/
Secas
/
Desnitrificação
/
Óxido Nitroso
Idioma:
Zh
Ano de publicação:
2014
Tipo de documento:
Article