Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, Campus Universitario de Espinardo, P.O. Box 165, 30100 Murcia, Spain.
Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, Campus Universitario de Espinardo, P.O. Box 165, 30100 Murcia, Spain.
J Hazard Mater. 2014 Mar 15;268:68-76. doi: 10.1016/j.jhazmat.2014.01.003. Epub 2014 Jan 8.
The efficiency of a remediation strategy was evaluated in a mine soil highly contaminated with trace elements (TEs) by microbiological, ecotoxicological and physicochemical parameters of the soil and soil solution (extracted in situ), as a novel and integrative methodology for assessing recovery of soil health. A 2.5-year field phytostabilisation experiment was carried out using olive mill-waste compost, pig slurry and hydrated lime as amendments, and a native halophytic shrub (Atriplex halimus L.). Comparing with non-treated soil, the addition of the amendments increased soil pH and reduced TEs availability, favoured the development of a sustainable vegetation cover (especially the organic materials), stimulated soil microorganisms (increasing microbial biomass, activity and functional diversity, and reducing stress) and reduced direct and indirect soil toxicity (i.e., its potential associated risks). Therefore, under semi-arid conditions, the use of compost and pig slurry with A. halimus is an effective phytostabilisation strategy to improve soil health of nutrient-poor soils with high TEs concentrations, by improving the habitat function of the soil ecosystem, the reactivation of the biogeochemical cycles of essential nutrients, and the reduction of TEs dissemination and their environmental impact.
采用微生物学、生态毒理学和土壤及土壤溶液理化参数（原位提取）对受微量元素（TEs）高度污染的矿山土壤进行修复策略的效率评估，这是一种评估土壤健康恢复的新的综合方法。使用橄榄厂废料堆肥、猪粪和熟石灰作为改良剂，并结合本地盐生灌木（滨藜）进行了为期 2.5 年的野外植物稳定化实验。与未处理的土壤相比，添加改良剂增加了土壤 pH 值，降低了 TEs 的有效性，有利于可持续植被覆盖的发展（特别是有机材料），刺激了土壤微生物（增加微生物生物量、活性和功能多样性，并降低了胁迫），减少了直接和间接土壤毒性（即其潜在的相关风险）。因此，在半干旱条件下，使用堆肥和猪粪与滨藜结合的方法是一种有效的植物稳定化策略，可以通过改善土壤生态系统的栖息地功能、重新激活必需养分的生物地球化学循环以及减少 TEs 的传播及其环境影响，改善富含 TEs 的贫营养土壤的健康状况。
