Environmental Effects and Carbon Sequestration Potential of Returning Agricultural Waste to Field By Carbonization

Carbon emissions from human activities have brought enormous pressure to stop global warming. In recent years, carbonization technology has been fully developed as an effective means of biomass resource utilization. The carbonization of agricultural waste to produce biochar can improve the application potential of agricultural waste in the fields of energy and environment. Biochar has been gradually applied in the field of soil improvement in recent years and has shown a good potential for carbon sequestration and emission reduction. It has become a key research topic in the fields of agriculture, environment, and energy. The physical and chemical properties of biochar and its many effects in soil improvement have been fully studied, confirming its excellent soil improvement performance. However, there is no clear conclusion about the carbon sequestration and emission reduction potential of biochar returning to the field. This paper briefly summarizes the biomass carbonization technology and the physicochemical properties of biochar, focusing on the soil advantages brought by the return of biochar to the field and its research progress on carbon sequestration and emission reduction. It is finally determined that the return of biochar to the field has a good potential for carbon sequestration and emission reduction. The carbon sequestration effect of biochar itself and the reduced greenhouse gas emissions after being applied to the soil can effectively offset the carbon emissions caused by human activities. And economic benefits still need to continue to study.

Keywords: Agricultural waste; Biochar; Carbonization; Carbon sequestration