Soil metal contamination has emerged as a global environmental issue due to toxicity to living organisms. Traditional remediation techniques applied to metal-contaminated soils are intrusive and expensive, by which more environmental-friendly methods, such as phytoremediation, are necessary to remediate metal-contaminated soils. This study aimed to evaluate the combined effect of poultry manure compost (PMC) and indigenous arbuscular mycorrhizal (IM) fungi inoculation over copper (Cu) immobilization and the effectiveness of these elements promoting the plant growth and the soil microbial communities in a Cu-contaminated soil. A sandy Cu-contaminated soil (338 mg kg⁻¹ of extractable Cu) was amended with PMC (2 and 4% w/w) in a pot experiment using the metallophyte Oenothera picensis. The plants were inoculated with the IM fungi isolated from the Cu-contaminated soils and grown for 3 months. PMC produced a liming effect, reduced the exchangeable Cu, and increased the amount of Cu-bound to organic and residual fractions. In addition, PMC also increased the biomass of O. picensis, which grew 8.5 times than the ones in unamended soil. Moreover, PMC incorporation stimulated soil microorganisms, increasing basal respiration and dehydrogenase activity modifying also the microbial community composition probably by reducing Cu availability and increasing carbon and nutrient sources to microorganism. On the contrary, the IM fungi inoculation reduced the plant biomass and increased the Cu translocation to the aboveground tissues. Therefore, the PMC is an effective amendment for remediating Cu-contaminated soils since it buffered soil pH, decreased Cu availability, supported the growth of O. picensis, and promoted mainly microbial activities in special shifting bacterial communities.

由于对生物的毒性，土壤金属污染已成为全球性的环境问题。应用于金属污染土壤的传统修复技术是侵入性的且昂贵的，通过这种技术，需要更环境友好的方法（例如植物修复）来修复金属污染的土壤。这项研究旨在评估固定化铜（Cu）时家禽粪便堆肥（PMC）和本地丛枝菌根（IM）真菌接种的综合效果，以及这些元素在铜污染的环境中促进植物生长和土壤微生物群落的有效性。土壤。使用金属植物月见草在盆栽实验中用PMC（2和4％w / w）修改了一个被铜污染的沙质土壤（338 mg kg ^-1的可提取铜）。。用从铜污染的土壤中分离出的IM真菌对植物进行接种，并使其生长3个月。PMC产生了石灰效应，减少了可交换的Cu，并增加了结合到有机部分和残余部分中的Cu的量。此外，PMC还增加了pic.opensis的生物量。，比未经改良的土壤增长了8.5倍。此外，PMC的掺入刺激了土壤微生物，增加了基础呼吸和脱氢酶的活性，还可能通过减少铜的可利用性并增加了微生物的碳和养分来源而改变了微生物群落的组成。相反，IM真菌接种减少了植物的生物量，并增加了Cu向地上组织的转运。因此，PMC是缓冲土壤pH值，降低Cu利用率，支持O. picensis的生长并主要促进特殊迁移细菌群落中微生物活性的有效改良剂，可修复Cu污染的土壤。