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首页> 外文期刊>International Journal of Phytoremediation >Effect of Soil Properties on Arsenic Hyperaccumulation in Pteris Vittata and Pityrogramma Calomelanos var. Austroamericana
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Effect of Soil Properties on Arsenic Hyperaccumulation in Pteris Vittata and Pityrogramma Calomelanos var. Austroamericana

机译：土壤特性对侧柏和翼状P目植物Calomelanos var中砷超积累的影响。南美洲

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摘要

Two arsenic (As) hyperaccumulators, Pteris vittata L. and Pityrogramma calomelanos var. austroamericana, were grown in As-contaminated soils of contrasting properties. Ferns were exposed to three levels of As in soil at concentrations of 0, 600 and 2400 mol kg-1 for a period of 22 weeks. Plant biomass and As concentration in fronds and roots varied significantly between the two species. At 600 mol kg-1 As level, As hyperaccumulation was not observed in both the fern species. However at the 2400 mol kg-1 As level, both the species accumulated very high levels (1000 mg kg-1) of As in fronds. Arsenic concentration and uptake in fronds of both species followed the order Kurosol (Box Hill) Vertosol (Narrabri) Ferrosol (Robertson). In the studied soils, P. vittata possessed higher frond biomass and As accumulation, and thus was more efficient in removing soil As than P. calomelanos var. austroamericana. Soil properties such as free Fe, clay and organic matter contents appear to have affected the bioavailability of As in the studied soils. These results show that soil properties influence the As extraction efficiency of hyperaccumulating plants and must be considered in context of the phytoextraction technology of As contaminated soils.
机译：两种砷（As）超级蓄积剂，凤尾蕨和Pityrogramma calomelanos var.。奥古斯丁（Austroamericana）生长在具有相反特性的被砷污染的土壤中。蕨类植物在土壤中分别以0、600和2400 mol kg-1的浓度暴露于三种水平的砷中，持续22周。在两个物种之间，植物生物量和叶和根中的砷浓度差异很大。在600 mol kg-1 As水平下，两种蕨类植物均未观察到As过度积累。但是，在2400 mol kg-1 As水平下，两个物种在叶片中都积累了很高水平的As（1000 mg kg-1）。两种物种的叶片中砷的浓度和吸收率均遵循黑钾（Box Hill），凡托索（Narrabri），铁氧磷（罗伯逊）的顺序。在研究的土壤中，白僵菌具有较高的叶生物量和As积累量，因此去除土壤As的效率高于P. calomelanos var。奥美。土壤特性，如游离铁，粘土和有机物的含量似乎已影响了砷在被研究土壤中的生物利用度。这些结果表明，土壤性质影响高积累植物对砷的提取效率，必须在砷污染土壤的植物提取技术中加以考虑。

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