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Comparison of Carbon Dioxide (CO 2 ) Fluxes between Conventional and Conserved Irrigated Rice Paddy Fields in Myanmar

Author

Listed:
  • Saw Min

    (Department of Ecology and Environmental Sciences, Faculty of Science, Palacký University Olomouc, CZ-78371 Olomouc, Czech Republic)

  • Martin Rulík

    (Department of Ecology and Environmental Sciences, Faculty of Science, Palacký University Olomouc, CZ-78371 Olomouc, Czech Republic)

Abstract

Rice ( Oryza sativa . L.), a major food crop widely grown in Myanmar, is the most prominent cause of greenhouse gas (GHG) emissions in agriculture. Moreover, as a result of modification in agricultural management practices (such as soil tillage), the soil organic matter is exposed to more oxidizing conditions, releasing CO 2 into the environment, contributing to global warming. Therefore, we studied the effects of both conventional and conservation soil tillage management practices on CO 2 fluxes on an experimental rice paddy field in Myanmar. Total CO 2 emissions during the night from paddies farmed under conventional practices were significantly higher than those from paddies farmed under conservation practices; however, no net CO 2 flux differences were found between practices. Total net CO 2 fluxes ranged from −59 to 1614 mg CO 2 m −2 h −1 in conventional practices and from −282 to 1082 mg CO 2 m −2 h −1 in conservation practices, respectively. Significantly higher rice biomass and grain yields were observed in conventional practices when compared to those in conservation practices, causing a significant rise in both CO 2 uptake and emissions during the day and night, respectively. In addition, the results of this study revealed that CO 2 emissions in rice fields could be much higher than expected, requiring further study to elucidate key factors driving the dynamics of CO 2 in rice paddy systems.

Suggested Citation

  • Saw Min & Martin Rulík, 2020. "Comparison of Carbon Dioxide (CO 2 ) Fluxes between Conventional and Conserved Irrigated Rice Paddy Fields in Myanmar," Sustainability, MDPI, vol. 12(14), pages 1-19, July.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:14:p:5798-:d:386563
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    References listed on IDEAS

    as
    1. Pushpam Kumar & Uwe A. Schneider, 2008. "Greenhouse gas emission mitigation through agriculture," Working Papers FNU-155, Research unit Sustainability and Global Change, Hamburg University, revised Feb 2008.
    2. Ranjan Bhattacharyya & Birendra Nath Ghosh & Prasanta Kumar Mishra & Biswapati Mandal & Cherukumalli Srinivasa Rao & Dibyendu Sarkar & Krishnendu Das & Kokkuvayil Sankaranarayanan Anil & Manickam Lali, 2015. "Soil Degradation in India: Challenges and Potential Solutions," Sustainability, MDPI, vol. 7(4), pages 1-43, March.
    3. Schneider, Uwe A. & Kumar, Pushpam, 2008. "Greenhouse Gas Mitigation through Agriculture," Choices: The Magazine of Food, Farm, and Resource Issues, Agricultural and Applied Economics Association, vol. 23(1), pages 1-5.
    4. Uwe A. Schneider & Pete Smith, 2008. "Greenhouse Gas Emission Mitigation and Emission Intensities in Agriculture," Working Papers FNU-164, Research unit Sustainability and Global Change, Hamburg University, revised Jul 2008.
    Full references (including those not matched with items on IDEAS)

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