Influence of applying biochar on soil physicochemical properties and its agricultural applications
Biochar is a kind of highly aromatic and refractory solid substance produced by pyrolysis of agricultural biomass under oxygen-limited conditions. Biochar has potential benefits in soil carbon sequestration, greenhouse gas emission reduction, soil improvement, and microbial applications. The recent domestic and international researches on the characteristics of biochar and its modified soil, as well as the application value and development prospects of biochar in the fields of microbiology, environment, and agriculture were summarized. Considering the basic properties of biochar, the focus was on analyzing the physicochemical properties and water-mechanical charac-teristics of biochar-modified soil, as well as the correlation with its basic properties. Additionally, the technological application prospects of biochar were also discussed. The results indicated that, ① the differences in the physicochemical properties of biochar were primarily influenced by the type of biomass material used for its production and the pyrolysis temperature.② The application of biochar to soil could alter its physicochemical properties, such as particle relative density, pore structure, and pH, thereby influencing the soil's water-mechanical characteristics.③ The technical applications of biochar in agriculture, ecology, and environmental fields were easily influenced by factors such as its porosity, specific surface area, and adsorption properties. The impacts of adding biochar on the basic properties of soil was comprehensively reviewed and the current research gaps were pointing out. The aim was to provide a reference for a deeper understanding of the technical applications of biochar and its development in new technological fields.
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