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| Progress of research on nitrous oxide emissions from agricultural fields in seven regions of China |
| Received:September 16, 2024 |
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| KeyWord:nitrous oxide;influencing factors;regional characteristics;emission reduction |
| Author Name | Affiliation | | WANG Shiquan | School of Ecology and Environment, Ningxia University, Yinchuan 750021, China | | ZHOU Meiping | School of Ecology and Environment, Ningxia University, Yinchuan 750021, China | | LIU Yajunjie | School of Ecology and Environment, Ningxia University, Yinchuan 750021, China | | YANG Fan | School of Ecology and Environment, Ningxia University, Yinchuan 750021, China |
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| Abstract: |
| In this article, the influencing factors and emission reduction measures of N2O production from farmland in seven regions of China were investigated by reviewing and analyzing previous literature data. The results show that the farmland N2O emission pathway is dominated by the soil denitrification process, and the relative contributions of nitrification and denitrification in each region depend on the local soil physicochemical properties and climatic conditions. The average N2O emissions from farmland in the seven regions of China were as follows：East China（0.032 billion tCO2e）>Central China（0.021 billion tCO2e）>South China（0.017 billion tCO2e）>Southwest China （0.016 billion tCO2e）>Northeast China（0.013 billion tCO2e）>North China（0.008 billion tCO2e）>Northwest China（0.006 billion tCO2e）> Northwest China（0.006 billion tCO2e）. The situation of influencing factors was different in each region, and nitrogen source, carbon source, pH, water content and temperature were the main influencing factors affecting N2O in farmland soils. Energy saving and emission reduction of N2O can be realized by changing farmland management and soil nutrient management practices. |
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