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首页> 外文期刊>Journal of environmental sciences >Seedling growth and metal accumulation of selected woody species in copper and lead/zinc mine tailings
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Seedling growth and metal accumulation of selected woody species in copper and lead/zinc mine tailings

机译：铜和铅/锌矿山尾矿中某些木本植物的幼苗生长和金属积累

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摘要

A greenhouse pot experiment was conducted to evaluate the potential of selected woody plants for revegetation in copper (Cu) and lead/zinc (Pb/Zn) mine tailing areas. Five woody species (Amorpha fruticosa Linn, Vitex trifolia Linn. var. simplicifolia Cham, Glochidion puberum (Linn.) Hutch, Broussonetia papyrifera, and Styrax tonkinensis) and one herbaceous species (Sesbania cannabina Pers) were planted in Cu and Pb/Zn tailings to assess their growth, root morphology, nutrition uptake, metal accumulation, and translocation in plants. Amorpha fruticosa maintained normal growth, while the other species demonstrated stress related growth and root development. Sesbania cannabina showed the highest biomass among the plants, although it decreased by 30% in Cu tailings and 40% in Pb/Zn tailings. Calculated tolerance index (TI) values suggested that A. fruticosa, an N-fixing shrub, was the most tolerant species to both tailings (TI values 0.92-1.01), while S. cannabina had a moderate TI of 0.65-0.81 and B. papyrifera was the most sensitive species, especially to Pb/Zn tailings (TI values 0.15-0.19). Despite the high concentrations of heavy metals in the mine tailings and plants roots, only a small transfer of these elements to the aboveground parts of the woody plants was evident from the low translocation factor (TF) values. Among the woody plants, V. trifolia var. simplicifolia had the highest TF values for Zn (1.32), Cu (0.78), and Pb/Zn (0.78). The results suggested that A. fruticosa and S. cannabina, which have the highest tolerance and biomass production, respectively, demonstrated the potential for tailings revegetation in southern China.
机译：进行了温室盆栽试验，以评估选定木本植物在铜（Cu）和铅/锌（Pb / Zn）矿山尾矿区的植被恢复的潜力。在铜和铅中种植了五种木本物种（紫穗槐，三叶青荆，辛普变种，Lutch。publeum puberum）和一种草本物种（Sesbania cannabina Pers）。评估它们在植物中的生长，根系形态，营养吸收，金属积累和易位。金露梅保持正常生长，而其他物种则表现出与压力有关的生长和根系发育。 Sesbania cannabina在植物中表现出最高的生物量，尽管在铜尾矿中减少了30％，在Pb / Zn尾矿中减少了40％。计算的耐受指数（TI）值表明，N固定灌木金黄色葡萄球菌对两种尾矿的耐受性最高（TI值为0.92-1.01），而大麻链球菌的中等TI含量为0.65-0.81，而B的中等。纸莎草是最敏感的物种，尤其是对Pb / Zn尾矿（TI值为0.15-0.19）。尽管矿山尾矿和植物根中的重金属含量很高，但从低转运因子（TF）值来看，这些元素仅少量转移到木本植物的地上部分。在木本植物中，V。trifolia var.。单叶植物的最高TF值分别为Zn（1.32），Cu（0.78）和Pb / Zn（0.78）。结果表明，分别具有最高耐受性和生物量产量的金黄色葡萄球菌和大麻链球菌显示了在中国南部进行尾矿再生的潜力。

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