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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Extractability and phytoavailability of cadmium in Cd-rich pedogenic soils
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Extractability and phytoavailability of cadmium in Cd-rich pedogenic soils

机译：富镉成土土壤中镉的萃取性和植物有效性

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摘要

Conspicuous vegetation entities of pedogenic soils rich in cadmium and their diethylene triamine pentaacetic acid (DTPA)-extractable Cd content (DCd) under the temperate continental and Mediterranean climatic conditions of western Anatolia were determined. Foliage of herbaceous plants and nearby soil samples was collected from 51 zinc mining areas. DCd content was found to reach 11.6%-16.2% of the total Cd content, indicating more extractability than in many other heavy metals. Growth chamber and nursery experiments were conducted with the seeds collected. Dactylis glomerata and Galium tenuissimum subsp. tenuissimum, both common in grazing lands, were found to be accumulating 23.5 mg Cd kg-1 and 22.3 mg Cd kg-1 dry matter, respectively, which are highly phytotoxic levels. Thlaspipraecox, known as a Cd-hyperaccumulating plant species, could not be successfully introduced into the Cd-rich mining soils under controlled conditions, suggesting genetic variation or inability to adapt. Volunteer species under controlled conditions included Poa bulbosa and Plantago lanceolata, both of which were potential Cd-hyperaccumulating candidates. Silene aegyptiaca and Silene vulgaris were other species commonly found around zinc mines and they were grown under controlled conditions without difficulty. However, Cd concentrations in the above-ground tissues of all species mentioned above were not over the 100 mgkg~(-1) dry matter threshold value for hyperaccumulating cadmium.
机译：确定了在安那托利亚西部温带大陆性和地中海性气候条件下，富含镉的成土土壤的明显植被实体及其二乙烯三胺五乙酸（DTPA）可提取的Cd含量（DCd）。从51个锌矿区收集了草本植物的叶子和附近的土壤样品。发现DCd含量达到总Cd含量的11.6％-16.2％，表明其可萃取性高于许多其他重金属。用收集的种子进行生长室和苗圃实验。 Dactylis glomerata和Galium tenuissimum亚种。两种在牧地上普遍存在的腱鞘菌都分别累积了23.5 mg Cd kg-1和22.3 mg Cd kg-1干物质，它们具有很高的植物毒性水平。 Thlaspipraecox，一种被称为Cd富集植物的物种，在受控条件下无法成功地引入到富含Cd的采矿土壤中，这表明遗传变异或无法适应。在受控条件下的志愿物种包括马铃薯（Poa bulbosa）和车前草（Planagoago lanceolata），它们都是潜在的Cd超富集候选者。硅古埃及和寻常硅是在锌矿附近常见的其他物种，它们在受控条件下轻松生长。然而，上述所有物种地上组织中的镉浓度均未超过镉超量的100 mgkg〜（-1）干物质阈值。

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