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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (25): 245-251.doi: 10.11924/j.issn.1000-6850.2014-0534

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Feasibility Study of Reclamation of Copper mining Wastelands for three species of Ornamental Plants

  

  • Received:2014-03-04 Revised:2014-04-11 Online:2014-09-05 Published:2014-09-05

Abstract: Phytoremediation is one of the best way to solve reclamation of wastelands, copper- ore wastelands contains high concentrations of Cu, which makes it difficult for reclamation, and the quantity of reported hyperaccumulation plants is limited, especially ornamental herb plants. The author carried out a test on 3 kinds of ornamental herb plants, such as Silene schafta, Tradescantia reflexa and Oxyria sinensis, to explore the feasibility of reclamation of abandoned copper-ore by imitating the feature of abandoned copper-ore, and adopted controlling variable factor to analyze and compare the transfer factor, enrichment coefficient and tolerance index of each plant. The results indicated that the tolerance index was T. reflexa>O. sinensis>S. schafta, which manifested T. reflexa and O. sinensis had higher tolerance, while S. schafta was more sensitive to copper stress. Compared with aboveground biomass, underground biomass was more sensitive, so the tolerance index of underground biomass should be highlighted when conducting evaluation of the characteristics of copper stress tolerance of plants. A comprehensive score was obtained by considering the tolerance, enrichment characteristics and the ornamental effect, the feasibility of the three plants applied to copper- ore wastelands ranked: T. reflexa>O. sinensis>S. schafta. The study results might offer reference for the comprehensive usage of copper-ore wastelands.