ABSTRACT
In recent years, Ligusticum chuanxiong Hort. is facing a serious international market challenge due to excessive levels of heavy metal cadmium. Reducing the cadmium content of L. chuanxiong has become an urgent problem to be solved. This paper first discusses the current research progress on high cadmium of L. chuanxiong including the sources of cadmium and the common measures to control the cadmium content of L. chuanxiong. It is pointed out that the existing control measures mainly focus on reducing the content of active cadmium in soil to reduce the toxicity of cadmium to L. chuanxiong. However, it has been proved that L. chuanxiong has an enrichment effect on soil cadmium, and the current research lacks to explore the reduction of active absorption of cadmium by L. chuanxiong. Based on this, this paper is the first time to analyze the feasibility of exogenous silicon to reduce the active absorption of cadmium by L. chuanxiong from a plant perspective, in order to provide a reference for exploring ways to effectively reduce the cadmium content of L. chuanxiong.