Combined effects of green manure returning and addition of sewage sludge compost on plant growth and microorganism communities in gold tailings.

Remediation of gold tailings is often difficult due to their extremely barren nature and highly heavy metal concentrations. Returning green manure and applying sewage sludge compost have the beneficial effects of providing nutrients and improving the soil environment. The effects of green manure plants, alfalfa (Medicago sativa L.