Remarkable N 2 O emissions by draining fallow paddy soil and close link to the ammonium-oxidizing archaea communities

Fallow paddies experience natural flooding and draining water status due to rainfall and evaporation, which could induce considerable nitrous oxide (N O) emissions and need to be studied specially. In this study, intact soil columns were collected from a fallow paddy field and the flooding-draining...

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Bibliographic Details
Published in:Scientific reports 2019-12, Vol.9 (1), p.2550
Main Authors: Wang, Ling, Li, Kun, Sheng, Rong, Li, Zhaohua, Wei, Wenxue
Format: Article
Language:English
Online Access:Get full text
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Summary:Fallow paddies experience natural flooding and draining water status due to rainfall and evaporation, which could induce considerable nitrous oxide (N O) emissions and need to be studied specially. In this study, intact soil columns were collected from a fallow paddy field and the flooding-draining process was simulated in a microcosm experiment. The results showed that both N O concentrations in the soil and N O emission rates were negligible during flooding period, which were greatly elevated by draining the fallow paddy soil. The remarkable N O concentrations in the soil and N O emission/h during draining both had significant relationships with the Arch-amoA gene (P  0.05). However, the number of AOA and the nitrification substrate (NH -N) in the 0-10 cm layer were significantly higher than in the 10-20 cm layer (P 
ISSN:2045-2322
DOI:10.1038/s41598-019-39465-y