Iron slag-based silicate fertilizer, a byproduct of the iron production process, has been applied as a soil amendment in Korean and Japanese rice paddies for over 50 years. Silicate fertilizer application is known to improve rice productivity and decrease methane (CH4) emissions. In Korea, CH4 emissions from rice paddy have dropped by around 50 % from 1990 to 2020, which might be attributed to the declining cropping area. In estimating the national CH4 flux inventory from the rice paddies, the emission factor (i.e., EFbaseline x EForganic matter x EFwater regime) and activity data (i.e., area and cultivation period) are considered. However, the silicate fertilizer application effect on CH4 flux has not been considered.

中文翻译：

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硅酸盐肥料施用对减少韩国稻田 CH4 排放和提高生产力的贡献


铁渣基硅酸盐肥料是炼铁过程的副产品，50 多年来一直被用作韩国和日本稻田的土壤改良剂。众所周知，硅酸盐肥料施用可以提高水稻产量并减少甲烷 （CH4） 排放。在韩国，从 1990 年到 2020 年，稻田的 CH4 排放量下降了约 50%，这可能是由于种植面积减少。在估算稻田的全国 CH4 通量库存时，考虑了排放因子（即 EFbaseline x EF有机质 x EFwater 状况）和活动数据（即面积和耕作期）。然而，硅酸盐肥料施用对 CH4 助焊剂的影响尚未得到考虑。