| Summary: | Sulfur, as an important component of protein, enzymes and other physiological active substances in plants, is irreplaceable and essential for crop growth. Due to the chemical characteristics of sulfur and its special physiological functions, sulfur has a certain coupling effect with the ecological environment effect of cadmium in the process of migration and transformation in the surface ecosystem, and directly or indirectly affects the migration and accumulation of cadmium in the soil-plant system. Under certain soil environment conditions, sulfur directly interacts with cadmium through valence change and affects its bioavailability; in addition, it can change the migration of Cd in soil by affecting the formation of Fe/Mn plaque on root surface; secondly, it indirectly affects the migration and accumulation of cadmium in different parts of plants through the synthesis of organic sulfur compounds in plants. At present, the research results on the effect of sulfur on cadmium migration and accumulation in soil-plant system are not consistent, the interaction between the two elements is multi-directional and complex, which may be related to soil environmental conditions, differences in plant rhizosphere micro domain and other factors, and the related review work is less. Therefore, the interaction between sulfur and cadmium in soil-plant system was introduced in this paper, and the mechanism and causes of cadmium migration and accumulation in soil-plant system under the influence of sulfur were analyzed, which provided reference for the application of sulfur and its compounds in the treatment and safe utilization of heavy metal cadmium contaminated agricultural soil.
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