New modified fly ash is an excellent amendment for stabilising soil heavy metals. In this study, new modified fly ash and an organic fertilizer were employed for soil heavy metal remediation. The applications of the organic fertilizer to the soil can lead to buffering of the alkalinity of new modified fly ash. The results of mixture treatments were better than those of the application of only new modified fly ash for free heavy metal reduction. Among them, the treatment of 0.4% organic fertilizer and 4% new modified fly ash led to a reduction in the Mehlich-3 extractable cadmium (Cd), copper (Cu), and lead (Pb) of 49.0%, 53.5%, 67.83%, respectively, but the treatment of 4% new modified fly ash led to the reduction of 47.6%, 48.09%, and 62.73%, respectively. By the end of the experiment, the urease and alkaline phosphatase activities in the soil had considerably improved, and those activities in the soil treated with 0.4% organic fertilizer and 4% new modified fly ash increased by 2.21 and 3.2 times, respectively, compared with that in the control treatment soil. Similarly, organic matter and available N, P, and K considerably improved with the addition of the organic fertilizer. This study demonstrated the importance of the application of organic fertilizers and new modified fly ash mixture for the remediation of HM-contaminated soils and the improvement of soil quality.

新型改性粉煤灰是稳定土壤重金属的极佳改良剂。在这项研究中，新的改性粉煤灰和有机肥料被用于土壤重金属的修复。有机肥料在土壤上的施用可以缓冲新改性粉煤灰的碱度。混合处理的结果优于仅使用新型改性粉煤灰进行游离重金属还原的结果。其中，通过对0.4％的有机肥和4％的新型改性粉煤灰进行处理，Mehlich-3可提取镉（Cd），铜（Cu）和铅（Pb）的含量分别降低了49.0％，53.5％，67.83分别为％，但处理4％的新型改性粉煤灰分别减少了47.6％，48.09％和62.73％。在实验结束时，土壤中的脲酶和碱性磷酸酶活性大大改善，与对照处理相比，用0.4％有机肥和4％新型改性粉煤灰处理过的土壤活性分别提高了2.21倍和3.2倍。同样，有机物和有效氮，磷和钾随着有机肥料的添加而大大改善。这项研究表明了应用有机肥料和新型改性粉煤灰混合物对修复被HM污染的土壤和改善土壤质量的重要性。添加有机肥后钾肥大大提高。这项研究表明了应用有机肥料和新型改性粉煤灰混合物对修复被HM污染的土壤和改善土壤质量的重要性。添加有机肥后钾肥大大提高。这项研究表明了应用有机肥料和新型改性粉煤灰混合物对修复被HM污染的土壤和改善土壤质量的重要性。