Conesa Héctor M, Robinson Brett H, Schulin Rainer, Nowack Bernd
Institute of Terrestrial Ecosystems, ETH Zurich, Universitaetstrasse 16, 8092 Zurich, Switzerland.
Environ Pollut. 2007 Feb;145(3):700-7. doi: 10.1016/j.envpol.2006.06.002. Epub 2006 Sep 28.
Lygeum spartum is a native species in semiarid Mediterranean areas that grows spontaneously on acid mine tailings. We aimed to study the suitability of this plant for phytostabilization. L. spartum was grown from both seeds and rhizomes in acid mine tailings with various fertilizer and lime treatments. Untreated soils had a solution pH of 2.9 with high concentrations of dissolved salts (Electrical Conductivity 25 dS m(-1)) and Zn (3100 mg L(-1)). Plants grown on untreated soil had high shoot metal concentrations (>4000 mg kg(-1)Zn). Liming increased the solution pH to 5.5 and reduced the dissolved salts by more than 75%, resulting in lower shoot metal accumulation. Plants grown from rhizomes accumulated less metal than those grown from seeds. Plants collected in the field had metal concentrations an order of magnitude less than plants raised in the growth chamber. These differences may be due to the higher moisture content and homogeneous nature of the soils used in the pot experiment.
刺叶滨藜是一种生长于半干旱地中海地区的本土植物，能在酸性矿山尾矿上自然生长。我们旨在研究这种植物用于植物稳定修复的适宜性。通过种子和根茎在经过各种肥料和石灰处理的酸性矿山尾矿中培育刺叶滨藜。未处理的土壤溶液pH值为2.9，溶解盐（电导率25 dS m(-1)）和锌（3100 mg L(-1)）浓度较高。在未处理土壤上生长的植物地上部金属浓度较高（>4000 mg kg(-1)锌）。施用石灰使溶液pH值升至5.5，并使溶解盐减少75%以上，从而降低了地上部金属积累。由根茎生长的植物比由种子生长的植物积累的金属更少。在田间采集的植物金属浓度比在生长室培育的植物低一个数量级。这些差异可能是由于盆栽试验中使用的土壤含水量较高且性质均匀。
