Effects of different management patterns on greenhouse gas emissions from single-season rice fields
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School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430023, China
China Carbon Emissions Registration and Clearing CO., LTD, Wuhan 430070, China
School of Economics, South-Central Minzu University, Wuhan 430074, China
College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan 430070, China
Institute of Soil Fertilizer and Plant Protection, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Hubei University Research Centre on China Agriculture Carbon Emission Reduction and Exchange, School of Business, Hubei University, Wuhan 430062, China
Final revision date: 2023-03-30
Acceptance date: 2023-04-17
Publication date: 2023-09-14
Corresponding author
Ying Diao   

School of Life Science and Technology, Wuhan Polytechnic University, China
Int. Agrophys. 2023, 37(4): 365–376
Author contribution statement: Wanling Hu: methodology, writing-original draft preparation, data curation. Zhenzhong Bai: investigation, visualization. Ronggui Hu: conceptualization, writing-reviewing and editing. Ying Diao, Xiangyu Xu and Hongling Wang: methodology, writing-reviewing and editing, supervision.
  • There were significant differences observed in soil temperature, water content and DOC among four cultivation modes.
  • The average fluxes of both CO2 and N2O were highest with the mode DS.
  • NH4+-N or NO3--N is one of the main factors affecting CO2 and N2O emissions in each mode.
  • The mode WSC could suppress GHG emissions by regulating NO3--N.
Different cultivation practices affect both rice yield and GHG emissions. In this study, GHG emissions, environmental factors, and soil factors on an annual scale for four common single-season rice-cultivation methods were monitored and the direct and indirect drivers of GHG emissions were analysed. The results showed that there were significant differences in the average soil temperature, water content and dissolved oxygen content for the different methods used, but not in terms of the NH4+-N and NO3-N content. The highest average methane flux was obtained using the waterlogging in the non-rice season with straw return mode method (4.20±0.16 mg m−2 h−1), which was a significantly higher result than that produced by the other methods. The main factors influencing CH4 emissions was atmospheric temperature for waterlogging in the non-rice season with straw return and crayfish farming, NO3-N for waterlogging in the non-rice season without straw return, NO3-N, and NH4+-N for waterlogging in the non-rice season with straw return, and NO3-N, NH4+-N, and soil water for non-rice season with straw return. The average fluxes of both CO2 and N2O were highest with the drainage in the non-rice season with straw return treatment, but the differences between the treatments were not significant. None of the factors that were determined had a significant direct effect on CO2 emissions under either cropping system. The main factors affecting N2O emission were NH4+-N and NO3-N in the WSC treatment, NH4+-N in the waterlogging in the non-rice season without straw return treatment, and NH4+-N, NO3-N, and dissolved oxygen content in the drainage in the non-rice season with straw return treatment. The results obtained have the potential to form an important basis for the establishment of agronomic measures to reduce and control GHG emissions from rice fields.
This work was supported by the Major Programme of the National Social Science Foundation of China (19ZDA085, 2019-2024) and the National Natural Science Foundation of China (71871086 (2019-2022), 41301306 (2014-2016)), and also, the Scientific and Technological Achievements Cultivation Project of the Hubei Academy of Agricultural Sciences, China (2017CGPY01, 2017-2019).
The authors declare no conflict of interest.
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