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| Research progress and prospects of water and crop residue managements to mitigate greenhouse gases emissions from paddy field |
| Received:January 15, 2020 |
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| KeyWord:water management;straw returning;methane;nitrous oxide;mitigation strategy;global warming potential |
| Author Name | Affiliation | | ZHOU Sheng | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai 201403, China | | ZHANG Xian-xian | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai 201403, China | | WANG Cong | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai 201403, China | | SUN Hui-feng | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai 201403, China | | ZHANG Ji-ning | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai 201403, China |
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| Abstract: |
| Rice production is an important emission source of anthropogenic greenhouse gases methane(CH4)and nitrous oxide(N2O). The production and emission of CH4 and N2O in paddy field are affected by agricultural management and environmental factors, especially water management and straw returning measures, which directly affect the redox status of paddy soil and the content of decomposed organic matter in soil. Both water and straw management measures have significant effect on the CH4 and N2O emission in paddy field. Many research results show that water management measures, such as controlling irrigation and alternate wetting and drying can significantly mitigate CH 4 emission, but may also promote N2O emission. Hence, how to mitigate CH4 and N2O emissions simultaneously is the key factor to achieve greenhouse gases emission mitigation in paddy fields. On the other hand, straw returning can improve the soil fertility of paddy fields and increase the exogenous carbon source, which promotes CH4 emission in paddy field. How to optimize the straw returning measures, coupling with water management, to achieve the co-benefits of soil improvement and greenhouse gases emission mitigation is very important for sustainable utilization of paddy field. In this paper, the research progress of greenhouse gases emission mitigation in paddy field in recent years is reviewed from the aspects of water management, straw management and water and straw collaborative management in paddy field. The research results of the effect of water management, water management coupling with fertilizer application on greenhouse gases mitigation in paddy field, and the effect of straw returning and water management coupling straw returning on greenhouse gases emission in paddy field are summarized. Furthermore, the future research of greenhouse gases emission mitigation in paddy field is prospected. |
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