Do nitrogen fertilizers stimulate or inhibit methane emissions from rice fields?

@article{Banger2012DoNF,
  title={Do nitrogen fertilizers stimulate or inhibit methane emissions from rice fields?},
  author={Kamaljit Banger and Hanqin Tian and Chaoqun Lu},
  journal={Global Change Biology},
  year={2012},
  volume={18}
}
In rice cultivation, there are controversial reports on net impacts of nitrogen (N) fertilizers on methane (CH 4) emissions. Nitrogen fertilizers increase crop growth as well as alter CH 4 producing (Methanogens) and consuming (Methanotrophs) microbes, and thereby produce complex effects on CH 4 emissions. Objectives of this study were to determine net impact of N fertilizers on CH 4 emissions and to identify their underlying mechanisms in the rice soils. Database was obtained from 33 published… 
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Background and aimsUrea is widely used in rice farming systems to improve the nitrogen (N) availability and crop yield, yet its influence on CH4 emissions remains unclear. The present study aimed to
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Abstract Methane (CH4) emissions are critical to greenhouse gas (GHG) management in agriculture, especially in areas growing rice (Oryza sativa). However, studies on CH4 emissions and the nitrogen
Effects of fertilization on microbial abundance and emissions of greenhouse gases (CH 4 and N2O) in rice paddy fields
TLDR
Results indicate that application of urea significantly changed the functional microbial composition, while the influence of straw incorporation was not significant, and the correlation between CH 4 and N2O emissions and the abundance of related functional genes was notsignificant.
Greenhouse gas emissions and reactive nitrogen releases from rice productionwith simultaneous incorporation of wheat straw and nitrogen fertilizer
Abstract. Impacts of simultaneous inputs of crop straw and nitrogen (N) fertilizer on greenhouse gas (GHG) emissions and N losses from rice production are not well understood. A 2-year field
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There is an ongoing discussion of the possible effects of nitrogen (N) application on methane (CH4) emission from rice fields. However, the Intergovernmental Panel on Climate Change (IPCC)
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TLDR
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