Madejón Engracia, de Mora Alfredo Pérez, Felipe Efraín, Burgos Pilar, Cabrera Francisco
Instituto de Recursos Naturales y Agrobiología de Sevilla, IRNAS-CSIC, Avenida Reina Mercedes 10, P.O. Box 1052, 41080 Seville, Spain.
Environ Pollut. 2006 Jan;139(1):40-52. doi: 10.1016/j.envpol.2005.04.034. Epub 2005 Jul 6.
We tested the effects of three amendments (a biosolid compost, a sugar beet lime, and a combination of leonardite plus sugar beet lime) on trace element stabilisation and spontaneous revegetation of a trace element contaminated soil. Soil properties were analysed before and after amendment application. Spontaneous vegetation growing on the experimental plot was studied by three surveys in terms of number of taxa colonising, percentage vegetation cover and plant biomass. Macronutrients and trace element concentrations of the five most frequent species were analysed. The results showed a positive effect of the amendments both on soil chemical properties and vegetation. All amendments increased soil pH and TOC content and reduced CaCl(2)-soluble-trace element concentrations. Colonisation by wild plants was enhanced in all amended treatments. The nutritional status of the five species studied was improved in some cases, while a general reduction in trace element concentrations of the aboveground parts was observed in all treated plots. The results obtained show that natural assisted remediation has potential for success on a field scale reducing trace element entry in the food chain.
我们测试了三种改良剂（一种生物固体堆肥、一种甜菜石灰以及一种腐殖酸加甜菜石灰的混合物）对微量元素污染土壤中微量元素稳定化及自然植被恢复的影响。在施用改良剂前后对土壤性质进行了分析。通过三次调查研究了试验地块上自然生长的植被，内容包括定居的分类单元数量、植被覆盖百分比和植物生物量。分析了五种最常见物种的大量营养素和微量元素浓度。结果表明，改良剂对土壤化学性质和植被均有积极影响。所有改良剂均提高了土壤pH值和总有机碳含量，并降低了氯化钙可溶微量元素浓度。在所有改良处理中，野生植物的定殖均得到增强。在某些情况下，所研究的五种物种的营养状况得到改善，而在所有处理地块中均观察到地上部分微量元素浓度普遍降低。所获得的结果表明，自然辅助修复在田间尺度上有成功的潜力，可减少食物链中的微量元素进入。
