几种十字花科花卉植物对铅的富集特征

为寻找铅污染土壤净化和景观化的材料,采用盆栽方法,研究了3种十字花科花卉在铅污染条件下对铅的富集特征。结果表明,3种观赏花卉中,香雪球(Lobularia maritime)地上部吸收富集铅的量最大,积累铅能力最强,其次为紫罗兰(Matthiola incana),羽衣甘蓝(Brassifa oleracea)吸收积累铅能力最弱;根部铅富集量最大的为香雪球,其次为羽衣甘蓝,紫罗兰根部铅吸收积累能力最弱。在Pb质量分数为1 000 mg/kg时,香雪球和紫罗兰耐性较强,可用作铅污染土壤的稳定修复植物。

Pb Accumulative Characteristics of Several Ornamental Flowers in Brassicaceae

To enrich data of Pb toxicity purification and Pb-contaminated environment landscaping, three ornamental flowers were screened to determine their absorbing characteristics for Pb and their endurable characteristics by pot-culture experiment. The results showed Lobularia maritime had a stronger capability of Pb accumulating in shoot than Matthiola incana and Brassifa oleracea, which had the weakest accumulating ability. Lobularia maritime accumulated more Pb in root than Brassifa oleracea and Matthiola incana which accumulated the lowest Pb. Lobularia maritime and Matthiola incana exhibited stronger endurance to Pb, which could be used for soil stabilization remediation.