Abstract: Soil salinization has become a major constraint to the sustainable development of the farmland ecological environment, and the comprehensive management of saline-alkali land is with a major goal of the policies for protecting agricultural ecological balance. As a regenerative product of agricultural and forestry resources, biochar has good potential for soil improvement and carbon sequestration reduction, due to its water and fertilizer retention characteristics, large specific surface area and strong adsorption. It can reduce the risk of environmental and groundwater non-point source pollution, which is of＇ great concern to scientists at home and abroad. The research resuhs in the field of agriculture and soil improvenmnt in recent years are summarized, and the application of bioehar and its compounds in the treatment of saline-alkali land in the future are discussed. The prospect of insuiticient application of biochar in agriculture today is put forward.

Key words: Bioehar;Water and soil environment;Saline-alkali soil improvenlent