The invention discloses a method for enhanced extraction and repair of moderately
cadmium contaminated farmland through
intercropping of oilseed rape and
sedum alfredii. The method includes
transplanting the oilseed rape subjected to
seedling culture into to-be-repaired soil, and in the
bolting and flowering stages of the oilseed rape, applying heavy
metal activators to the soil in a root region of the oilseed rape;
transplanting seedlings of the
sedum alfredii into to-be-repaired soil of the moderately
cadmium contaminated farmland, and performing
intercropping cultivation management; in theseedling and rapid growth stages of the
sedum alfredii, spraying enhanced repairing agents onto leaves of the
sedum alfredii; and harvesting oilseed rape plants and
sedum alfredii plants. The method has the advantages that the oilseed rape and the
sedum alfredii are intercropped, the heavy
metal activators and the enhanced repairing agents are applied cooperatively, the absorption of
cadmium in the to-be-repaired soil by the oilseed rape and the sedum alfredii is remarkably improved, and the soil repairing effect on the moderately cadmium contaminated farmland is further improved.