Potential of enhancing the phytoremediation efficiency of L. by earthworms.

Contamination of the soil by Cadmium (Cd) is emerged as a critical environmental problem in China due to current urbanization and industrial activities that hinder the sustainable future development of agriculture. In this study, a system combined by earthworm and L. () was designed for remediation of Cadmium from contaminated soils. The present study revealed that application of earthworm enhanced the biomass of by 61.71%, maxim; the Cd concentrations in the aboveground part of enhanced 35.8% when 50 g earthworm was added into each pot; the addition of earthworm also have some effect on the bio-concentration factor (BF) of while no effect was detected on the bio-transfer factor (TF). In addition, considering the accumulation of Cd by earthworm, the total amount of Cd extracted by the combined system enhanced 57.7% at least and 264.6% at the most, compared to the Cd extraction amount of alone. Generally, according to this study, the earthworm- system has the potential to be used for the remediation of Cd contaminated soils.