Artificial macropores and water management effects on reduction of greenhouse gas emissions from rice paddy fields

Bui, Thanh Long; Mori, Yasushi; Maeda, Morihiro; Somura, Hiroaki

doi:10.1016/j.envc.2022.100657

Cited by 1 publication

(1 citation statement)

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“…하지 만, 동일한 논임에도 불구하고 기후, 토양 조건 및 영농방식에 따라 배출되는 온실가스 배출 경향과 그 양이 달라지고 (Ahn et al, 2014;Liu et al, 2019a), 특히, 동아시아의 경우 장마 기후로 인한 CH 4 배출이 더욱 주목받고 있다 (Ito et al, 2022). 그동안 논물 관리에 관한 온실가스 완화 효과 및 쌀 생산량을 개별적으로 조사 및 분석한 연구는 상당부분 진행되어왔다 (Camargo et al, 2018;Bui et al, 2022)…”

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Effects of Water Management Practices on Methane Emissions and Rice Yields in East Asian Paddy Fields: A Regional-Scale Meta-Analysis

Lee,

Jeong,

Lee

et al. 2023

Korean J. Soil. Sci. Fert.

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Paddy fields are considered one of the most important sources of anthropogenic methane (CH 4 ) emissions. Drainage of the flooded soils can reduce CH 4 substantially, but rice yields can be variable depending on soil drainage. Therefore, to reduce this variability, water management effects on CH 4 emissions and rice yields were comprehensively analyzed in paddy fields of countries similar to Korea. Here, we selected 161 observations of water management and 174 observations of rice yields from 28 articles and conducted a regional-scale meta-analysis of the effects of water management practices on CH 4 emissions and rice yields in paddy fields. As a result of the analysis, we found that water management practices in East Asian paddy fields reduced methane by 60.5%. Water management practices in paddy fields decreased rice yield by 5.8% but there was no significant. The water management practices of the paddy fields with a high CH 4 emission reduction effect and no impact on rice yields were alternating wet and dry (AWD), flooding-drainage-reflooding (FDF), and moist irrigation (MI) practices. Therefore, it is considered that the above three practices can be applied in Korea. The results of this study are expected to predict CH 4 emissions and rice yields generated by water management practices in East Asian rice paddies in the future and be used as basic data for the development of national unique coefficients.

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