Application of biochar in amelioration of saline-alkali soil

In recent years, there are more and more studies on the application of biochar, and biochar has attracted the attention of researchers at home and abroad. Biochar has been widely applied because most of its raw materials are agricultural wastes, and it has the characteristics of porous, large specific surface area, and rich mineral elements, showing great potential in improving barren soil and repairing polluted soil. Soil salinization is one of the important factors limiting land use. Improving the salinization of soil is beneficial to agricultural production and ecosystem restoration. Therefore, the study on the improvement effect of biochar application on saline-alkali soil can provide a new idea for solving agricultural solid waste and is of great significance to the development of world agriculture. In this paper, the effects of biochar on soil's physical and chemical properties, nutrient content, microorganisms, greenhouse gas emissions, and crop growth, as well as the potential environmental risks of biochar were discussed. The purpose of this paper is to provide new ideas for the application of biochar and reference for the improvement of saline-alkali land.