生物碳是生物质原料在限氧或绝氧的条件下,通过热化学转化得到的一种固态富碳物质。近年来,生物碳在土壤改良方面的应用受到越来越多的关注。作为土壤改良剂,生物碳有望提高土壤养分,改善土壤结构和微生物生态,提高农作物产量。基于此,重点从生物碳的制备、性质及其对土壤理化性质和土壤微生物的影响方面结合国内外研究展开讨论。 Biochar is a solid, carbon-rich material obtained by thermochemical conversion of biomass raw materials under oxygen-limited or anaerobic conditions. In recent years, the application of biochar in soil improvement has received more and more attention. As a soil conditioner, biochar is expected to increase soil nutrients, improve soil structure and microbial ecology, and increase crop yields. Based on this, the focus will be on the combination of domestic and foreign research on the preparation and properties of biochar and its impact on soil physical and chemical properties and soil microorganisms.