Yang B, Shu W S, Ye Z H, Lan C Y, Wong M H
State Key Laboratory for Bio-Control, School of Life Sciences, Zhongshan University, Guangzhou 510275, PR China.
Chemosphere. 2003 Sep;52(9):1593-600. doi: 10.1016/S0045-6535(03)00499-5.
The lead (Pb)/zinc (Zn) tailings contained high concentrations of heavy metals (total Pb, Zn, Cu and Cd concentrations 4164, 4377, 35 and 32 mg kg(-1), respectively), and low contents of major nutrient elements (N, P, and K) and organic matter. A field trial was conducted to compare growth performance, metal accumulation of Vetiver (Vetiveria zizanioides) and two legume species (Sesbania rostrata and Sesbania sesban) grown on the tailings amended with domestic refuse and/or fertilizer. It was revealed that domestic refuse alone and the combination of domestic refuse and artificial fertilizer significantly improved the survival rates and growth of V. zizanioides and two Sesbania species, especially the combination. However, artificial fertilizer alone did not improve both the survival rate and growth performance of the plants grown on tailings. Roots of these species accumulated similar levels of heavy metals, but the shoots of two Sesbania species accumulated higher (3-4 folds) concentrations of Pb, Zn, Cu and Cd than shoots of V. zizanioides. Most of the heavy metals in V. zizanioides were accumulated in roots, and the translocation of metals from roots to shoots was restricted. Intercropping of V. zizanioides and S. rostrata did not show any beneficial effect on individual plant species, in terms of height, biomass, survival rate, and metal accumulation, possibly due to the rather short experimental period of 5 months.
铅（Pb）/锌（Zn）尾矿中重金属含量很高（总铅、锌、铜和镉含量分别为4164、4377、35和32毫克/千克），主要营养元素（氮、磷和钾）及有机质含量较低。开展了一项田间试验，比较香根草（Vetiveria zizanioides）以及两种豆科植物（距瓣豆（Sesbania rostrata）和田菁（Sesbania sesban））在添加了生活垃圾和/或肥料的尾矿上的生长性能及金属积累情况。结果表明，单独添加生活垃圾以及生活垃圾与人工肥料的组合均显著提高了香根草和两种田菁属植物的成活率和生长量，尤其是二者的组合。然而，单独使用人工肥料并未提高尾矿上所种植植物的成活率和生长性能。这些植物的根部积累的重金属水平相近，但两种田菁属植物地上部分积累的铅、锌、铜和镉浓度比香根草地上部分高（3至4倍）。香根草中的大部分重金属积累在根部，从根部向地上部分的转运受到限制。香根草与距瓣豆间作在株高、生物量、成活率和金属积累方面对单株植物未显示出任何有益影响，这可能是由于试验期仅5个月，时间较短。
