Growing attention has been paid to greenhouse gases (GHG) viz. carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O), due to their contribution to global warming. Biochar is used widely in agricultural soils to improve some soil properties, enhance soil nutrients, and mitigate GHG emissions. However, the previous studies on acidic soils reported contradictory results of CO₂, CH₄, or N₂O emissions due to various factors that vary based on the properties of soil and biochar. The data on the impact of biochar application on GHG emissions in alkaline soils are limited, and because of the alkaline nature of biochar, it is expected to behave similarly as on acidic soil. However, contradictory results are noticed also in the alkaline soils, especially in CO₂ and CH₄. Therefore, this review gives insight into the contradictory results of CO₂, CH₄, or N₂O emissions as affected by biochar with a special focus on alkaline soils and the potential factors included in this process.

人们越来越关注温室气体 (GHG)，即。二氧化碳 (CO ₂ )、甲烷 (CH ₄ ) 和一氧化二氮 (N ₂ O)，因为它们对全球变暖有贡献。生物炭广泛用于农业土壤，以改善某些土壤特性、增强土壤养分和减少温室气体排放。然而，先前对酸性土壤的研究报告了 CO ₂、CH ₄或 N _{2 的}相互矛盾的结果由于各种因素导致的 O 排放量因土壤和生物炭的特性而异。关于生物炭应用对碱性土壤中温室气体排放影响的数据有限，并且由于生物炭的碱性性质，预计其行为与酸性土壤相似。然而，在碱性土壤中，尤其是在 CO ₂和 CH ₄中，也注意到了相互矛盾的结果。因此，本综述深入了解了受生物炭影响的 CO ₂、CH ₄或 N ₂ O 排放的矛盾结果，特别关注碱性土壤和该过程中包含的潜在因素。