土壤种子库中Mn超量积累植物的筛选

Screening of Excess Mn Accumulation Plant in Soil Seed Bank

超量积累植物的筛选是植物修复技术应解决的关键问题之一。研究以土壤种子库作为筛选源,采用原子吸收分光光度法测定在Mn矿渣土壤上生长出的植物中的Mn的含量。结果表明,有13种植物能够在富含Mn的矿渣土壤上生长。马唐、求米草对Mn具有抗性;碎米荠能超量积累重金属Mn;樟树种子能够萌发并很好地生长,其中半夏的转运系数最高,具有能重新利用重金属Mn的应用前景。

The screening of hyperaccumulator is one of important problem that the plant repair technology should solve. The soil seed bank was taken as the screening source, the atomic absorption spectrophotometric method was used to determine the Mn content of plants that grow on the Mn gangue soil. The result indicated that there are 13 kinds of plants that can grow on the gangue soil which is rich in the heavy metal of Mn gangue. Digitaria sanguinalis （L.） Scop., Opliamenus undulatifolius （Ard.） Beauv. have the resistance to Mn; Cardamine flexuosa W/th.can accumulate the excess heavy metal of Mn. The Cinnamomun camphora seed can sprout and grow well, P. ternata （Thunb.） Breit transportation coefficient is the highest, which have the prospect of reuse heavy metal Mn.