Abstract The use of stabilization techniques for the recovery of trace element–contaminated soils has steadily increased in the last decades. A short-term pot experiment was carried out under semifield conditions using two organic amendments (biosolid compost and “alperujo” compost) and two plant species (Medicago polymorpha and Poa annua). The effect of amendments and plant species on chemical properties (pH, total organic carbon, water soluble carbon, N-Kjeldhal, available K, and available P) and on enzyme activities (dehydrogenase, urease, &bgr;-glucosidase, and acid phosphatase) of two trace element–contaminated soils with different pH values (6.32 and 3.23) was studied. No significant effects of amendment addition and plant rhizosphere were found in the neutral contaminated soil. However, in the acid soil, noticeable effects due to organic amendment addition, especially biosolid compost, were found. Indeed, the most remarkable effects were the increase in soil pH and improvement of soil conditions for the establishment of the vegetation. Moreover, a marked decrease in trace element availability and an increase in the nutritional status of plants due to the improvement of soil fertility were observed in the acid soil. Both plants tested could be acceptable candidates for phytostabilization techniques. The application of amendments is crucial in acidic contaminated soils, whereas in neutral contaminated soils, this application should be evaluated in economic terms.

中文翻译：

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有机堆肥改善受污染土壤质量和植物肥力

摘要 在过去的几十年里，稳定技术在微量元素污染土壤的恢复中的应用稳步增加。在半田条件下使用两种有机改良剂（生物固体堆肥和“alperujo”堆肥）和两种植物物种（紫花苜蓿和早熟禾）进行了短期盆栽试验。改良剂和植物物种对化学特性（pH、总有机碳、水溶性碳、N-Kjeldhal、有效钾和有效磷）和酶活性（脱氢酶、脲酶、β-葡萄糖苷酶和酸性磷酸酶）的影响研究了具有不同 pH 值（6.32 和 3.23）的两种微量元素污染土壤。在中性污染土壤中未发现添加改良剂和植物根际的显着影响。但在酸性土壤中，发现了由于添加有机改良剂，特别是生物固体堆肥而产生的显着影响。事实上，最显着的影响是增加土壤 pH 值和改善土壤条件以建立植被。此外，由于土壤肥力的改善，在酸性土壤中观察到微量元素可用性显着降低和植物营养状况增加。测试的两种植物都可能是植物稳定技术的可接受候选者。改良剂的应用在酸性污染土壤中至关重要，而在中性污染土壤中，这种应用应从经济角度进行评估。最显着的效果是提高土壤 pH 值和改善土壤条件以建立植被。此外，由于土壤肥力的改善，在酸性土壤中观察到微量元素可用性显着降低和植物营养状况增加。测试的两种植物都可能是植物稳定技术的可接受候选者。改良剂的应用在酸性污染土壤中至关重要，而在中性污染土壤中，这种应用应从经济角度进行评估。最显着的效果是提高土壤 pH 值和改善土壤条件以建立植被。此外，由于土壤肥力的改善，在酸性土壤中观察到微量元素可用性显着降低和植物营养状况增加。测试的两种植物都可能是植物稳定技术的可接受候选者。改良剂的应用在酸性污染土壤中至关重要，而在中性污染土壤中，这种应用应从经济角度进行评估。