[Accumulation and Application Potentials of Dominant Plants on Pb-Zn Mines in Karst Region， Guangxi]

To screen plants appropriate for remediating heavy metal-contaminated soil and facilitating ecological restoration in karst regions， field surveys were conducted at three lead-zinc mining sites in Guangxi. Twenty-five dominant plant samples， along with their rhizosphere soil samples， were collected to measure the concentrations of Cd， Cu， Ni， Pb， and Zn. The capacity of these plants to accumulate and translocate heavy metals， as well as their potential application prospects， were analyzed. The results suggest that the concentration of heavy metals in the majority of plants exceeded the normal range. The translocation factors for Cd， Cu， Pb， and Zn in Urena lobata are 3.69， 1.70， 1.03， and 2.36， respectively. The bioconcentration factor for Cd in Urena lobata is 1.60， with a Cd concentration of 39.4 mg·kg^-1 in the aboveground part， indicating its potential as a Cd-accumulating plant. Solanum virginianum， Chromolaena odorata， and Buddleja lindleyana exhibited strong Cu translocation capacities， with translocation factors of 2.97， 2.67， and 2.31， respectively. Pueraria montana exhibited a strong capacity for Pb translocation， with a translocation factor of 2.21 and Pb concentration of 532 mg·kg^-1. These plants are candidates for contaminated soil treatment in karst regions impacted by lead-zinc mining. The translocation factors of Cd， Cu， Pb， and Zn of Oreocnide frutescens and Causonis japonica were less than 0.3， and the bioconcentration factors were less than 0.1. These plants possess low levels of heavy metals in their tissues and exhibit limited capacity for translocation of heavy metals， making them suitable for cultivation in proximity to mining areas or agricultural lands to mitigate the adverse effects of heavy metals on human health through the food chain. Hence， these seven plants can be applied to vegetation reclamation in lead-zinc mining areas in karst regions according to their accumulation and translocation characteristics.