首页|Restoration potential of pioneer plants growing on lead-zinc mine tailings in Lanping, southwest China
Restoration potential of pioneer plants growing on lead-zinc mine tailings in Lanping, southwest China
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This study focused on the restoration potential of ten pioneer plants (Artemisia roxburghiana, Artemisia tangutica, Carex inanis,Cyperaceae hebecarpus, Plantago depresa, Cynoglossum lanceolatum, Potentilla saundesiana, Coriaria sinica, Oxyria sinensis, andMiscanthus nepalensis) during the early phase of Pb-Zn mine tailings phytostabilization, in Lanping, China. The concentrations ofheavy metals (Pb, Zn, and Cu) and soil fertility (the available N, P, K, and organic matter) in the rhizosphere of these species have been compared. The results showed a general improvement in the rhizosphere soil properties of pioneer plants. Of the ten species, theconcentrations of Pb, Zn, and Cu in the rhizosphere of A. Roxburghiana have the greatest reduction of 56.23%, 83.00%, and 84.36%,respectively, compared to the bulk soil. The best improvement in soil fertility was found in the rhizosphere of P. Saundesiana, with anincrease of 241.83%, 170.76%, 49.09%, and 81.60%, respectively, in the available N, E K, and organic matter. Metals accumulated bythe plants have been mainly distributed in the root tissues, and only small amounts transferred m the aboveground tissues. The highestcontents of Pb and Zn have been recorded in C. Hebecarpus with 57.84 and 87.92 mg/kg dry weight (dw), respectively. The maximumCu content was observed in C. Inanis with 1.19 mg/kg dw. Overall, pioneer plants will be ideal species for the phytostabilization of minetailings, but the potential use varies in different pioneer plant species. Among these ten species, A. Roxburghiana has been identified tobe the most suitable for phytostabilization programs, due to its greatest improvement on physicai-chemical properties in the rhizospheresoil.
Laboratory for Conservation and Utilization of Bio-Resource ＆ Institute of Environmental Sciences and Ecological Restoration, Yunnan University,Kunming 650091, China
Institute of Land & Resources and Sustainable Development, Yunnan University of Finance
NETL
NSTL
万方数据
维普
