Bioaccumulation and translocation of rare earth elements in two forage legumes grown in soils treated with coal fly ash

Coal fly ash (CFA) is often used as a soil amendment to improve the physicochemical properties of the soil. However, CFA contains abundant rare earth elements (REEs), which may negatively affect plant growth and physiology and cause environmental hazards. We performed pot experiments to grow alfalfa (Medicago sativa L.) and erect milkvetch (Astragalus adsurgens Pall.) in soils treated with different rates of CFA, in order to investigate the...