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

다국어 초록 (Multilingual Abstract)

The application of biochar in agricultural ecosystems is emerging as a potential solution to mitigate nitrousoxide (N2O) emission. However, the impact of biochar application on N2O emissions from cropland appears tobe variable among numerous studies and remains uncertain. Therefore, the effects of biochar application underoxygen conditions were comprehensively analyzed for countries similar to Korea. In this study, a dataset basedon 42 published papers was used to quantify the effect sizes of biochar application on soil N2O emissions. Asa result of the meta-analysis, the N2O reduction effect of biochar was 33.0 ± 15.0%, which was significantlyreduced by 28.1 ± 2.0% under aerobic conditions and 37.5 ± 4.1% under anaerobic conditions (p < 0.001). As aresult of a meta-analysis of related variables for N2O emission, it was analyzed that the input amount of biochar,pyrolysis temperature, soil C/N, and fertilizer input had a significant N2O reduction effect under both aerobicand anaerobic conditions. In this study, it was found that N2O emissions could be reduced through the appli cation of biochar in cropland of East Asia. The response ratio of N2O was greater under anaerobic conditions,but quantitatively it was greater under aerobic conditions. This suggests that the biochar application effect willbe high in aerobic conditions soil such as uplands.

참고문헌 (Reference)

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