Research Progress of CO2 Flux in Saline and Alkali soils in Arid area

Abstract

Study on CO2 flux of saline and alkali soil in arid area is of great significance to greenhouse gas control. At present, the main research contents at home and abroad focus on the ways of CO2 sequestration and migration and transformation in saline-alkali soils in arid areas. The influencing factors of CO2 flux in saline-alkali soil in arid area include soil temperature, humidity, pH, EC and soil physical and chemical properties. Inorganic carbon equilibrium process of CO2(g)—CO2 (aq)—HCO3- (aq)—CaCO3(s) is common in soil, its dynamic process dominates the inorganic carbon exchange at the ground-gas interface. This is of great significance to the study of soil-atmospheric carbon circulation system for exploring the principle and mechanism of greenhouse gas change in order to slow down global warming and strengthen the management and control of greenhouse gases. It contributes to China’s energy conservation and emission reduction planning and international carbon balance negotiations.