5. Conclusions
The use of either manure compost or sewage sludge resulted in decreased pH and DTPA-extractable metal ions in the Pb/Zn and Cu mine tailings, with a better growth of vetiver and common reed in all treatments except for the use of manure compost in Pb/Zn mine tailings. The organic amendments provided high amounts of N, P, and K for the growth of both species. Nevertheless, they did not significantly reduce Zn uptake and accumulation by vetiver and common reed. According to the results presented herein, it can be concluded that vetiver is an excellent plant species for the reclamation of Pb/Zn and Cu mine tailings.