烟曲霉f4对黑麦草修复电子废物拆解场地土壤重金属的影响

为了探究烟曲霉f4对黑麦草修复电子废物拆解场地土壤重金属的影响，通过实验比较接菌处理和不接菌处理黑麦草的生物量、重金属含量、重金属形态分布、富集系数和迁移系数。结果表明：接菌处理前20 d阶段黑麦草地上部分的生物量最大，随着时间推移，地上部生物量逐渐减少；接菌处理与不接菌处理之间地下部生物量存在显著差异，接菌后，其生物量的增幅为91.27%；在接菌处理的地下部，Ni、Cu、Zn、Cd、Cr和Pb的含量与不接菌处理相比，其增幅分别为484%、398%、470%、355%、531%、490%；根际土壤中重金属形态发生改变，接菌处理与不接菌处理相比，Cd、Cu、Zn、Pb和Cr的弱酸可提取态占比提高了0.9%、0.8%、0.5%、0.3%、0.1%。烟曲霉f4能促进黑麦草生长，提高根际土壤中重金属的弱酸可提取态的含量，增加黑麦草对其富集，从而提高了黑麦草对重金属的修复效率。

Effects of Aspergillus fumigatus f4 on the soil heavy metal remediation in e-waste dismantling site by ryegrass

In order to investigate the effect of Aspergillus fumigatus f4 on the soil heavy metal remediation in e-waste dismantling site by ryegrass, the experiments were conducted to compare the biomass, heavy metal content, heavy metal form distribution, enrichment coefficient, and migration coefficient of ryegrass treated with and without Aspergillus fumigatus f4 inoculation. The results showed that the aboveground biomass of ryegrass reached the largest at the 20 d-stage before the inoculation, and then gradually decreased with time. There was a significant difference in the substratum biomass of ryegrass between the treatments with and without Aspergillus fumigatus f4 inoculation. The biomass after inoculation increased by 91.27%. Compared with the non-inoculated treatment, the content of Ni, Cu, Zn, Cd, Cr, and Pb in the substratum biomass of ryegrass with Aspergillus fumigatus f4 inoculation increased by 484%, 398%, 477%, 355%, 531%, and 490%, respectively. The forms of heavy metals in ryegrass rhizosphere also changed. Compared with the non-inoculated treatment, the proportion of weakly acid extractable forms of Cd, Cu, Zn, Pb, and Cr in ryegrass rhizosphere with Aspergillus fumigatus f4 inoculation increased by 0.9%, 0.8%, 0.5%, 0.3% and 0.1%, respectively. Aspergillus fumigatus f4 could promote the growth of ryegrass, increase the content of weak acid extractables of heavy metals in the rhizosphere soil, and their enrichment by ryegrass, and thereby improve the remediation efficiency of heavy metals by ryegrass.