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Deep Drainage Lowers Methane and Nitrous Oxide Emissions from Rice Fields in a Semi-Arid Environment in Rwanda

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dc.contributor.author Tuyishime, Olive
dc.contributor.author Strömgren, Monika
dc.contributor.author Joel, Abraham
dc.contributor.author Messing, , Ingmar
dc.contributor.author Naramabuye, Francois Xavier
dc.contributor.author Wesström, Ingrid
dc.date.accessioned 2023-02-15T12:15:54Z
dc.date.available 2023-02-15T12:15:54Z
dc.date.issued 2022
dc.identifier.citation Tuyishime, O., Strömgren, M., Joel, A., Messing, I., Naramabuye, F. X., & Wesström, I. (2022). Deep Drainage Lowers Methane and Nitrous Oxide Emissions from Rice Fields in a Semi-Arid Environment in Rwanda. Soil Systems, 6(4), 84. https://doi.org/10.3390/soilsystems6040084 en_US
dc.identifier.uri http://hdl.handle.net/123456789/1823
dc.description Journal article en_US
dc.description.abstract Few studies have explored greenhouse gas (GHG) emissions from arable land in subSaharan Africa (SSA), and particularly from rice paddy fields, which can be a major source of methane (CH4 ) and nitrous oxide (N2O) emissions. This study examined the effect of drainage on CH4 and N2O emissions from rice fields in Rwanda under shallow drainage to 0.6 m, with the drain weir open four times per week, and deep drainage to 1.2 m with the weir open four times or two times per week. CH4 and N2O fluxes from the soil surface were measured on nine occasions during rice flowering and ripening, using a closed chamber method. Measured fluxes made only a minor contribution to total GHG emissions from rice fields. However, drainage depth had significant effects on CH4 emissions, with shallow drainage treatment giving significantly higher emissions (~0.8 kg ha−1 or ~26 kg CO2 -equivalents ha−1 ) than deep drainage (0.0 kg) over the 44-day measurement period. No treatment effect was observed for N2O fluxes, which ranged from low uptake to low release, and were generally not significantly different from zero, probably due to low nitrogen (N) availability in soil resulting from low N fertilization rate (in the region). Overall, the results suggest that deep drainage can mitigate CH4 emissions compared with traditional shallow drainage, while not simultaneously increasing N2O emissions en_US
dc.description.sponsorship Swedish International Development Cooperation Agency (SIDA) en_US
dc.language.iso en en_US
dc.publisher Soil systems en_US
dc.subject greenhouse gas; CH4 ; N2O; paddy rice en_US
dc.title Deep Drainage Lowers Methane and Nitrous Oxide Emissions from Rice Fields in a Semi-Arid Environment in Rwanda en_US
dc.type Article en_US


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