Effect of Biochar on Nitrous Oxide Emissions under Anaerobic and Aerobic Conditions in Cropland of East Asia: A Meta-Analysis

Lee, Jong-Mun; Choi, Eun‐Jung; Gwon, Hyo-Suk; Lee, Hyoungseok; Park, Hye-Ran; Park, Do-Gyun; Lee, Sun-Il

doi:10.7745/kjssf.2022.55.4.308

Cited by 1 publication

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“…농작물 생산에 대한 수요를 충족시키기 위해서 비료 사용은 불가피하며, 이에 따른 CH 4 과 N 2 O 배출 증 가 또한 피할 수 없다 (Xia et al, 2017;Wu et al, 2019a). 따라서, 동아시아지역의 높은 작물 생산성은 유지하면서 온 실가스 배출을 줄이기 위한 효과적인 해결책이 필요하다 (Lee et al, 2023).…”

Section: Introductionunclassified

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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Section: Introductionunclassified