The present invention belongs to the technical field of the restoration of
coal mine restoration areas. In order to understand the effects of
heavy metals and PAHs on the diversity of restored plants and soil microbial communities under different utilization
modes, a method for constructing a combined
plant-microbial
community restoration
system in
coal mine restoration areas is provided. The
quadrat survey method is used to investigate the composition and structural characteristics of the
vegetation community in the
gangue restoration area; the Miseq high-
throughput sequencing technology is used to detect the composition and diversity of the bacterial
community in the soil of the
gangue area, analyze the composition, distribution and diversity characteristics of the microbial community at different stages of mining area accumulation and restoration and in different seasons of the restoration area, and analyze their differences, and use the co-
evolution strategy to screen the
plant rhizosphere-microbial ecological community that can efficiently degrade pollutants; construct a soil-
plant-microbial efficient degradation
system. The plants that can enrich
heavy metals and have a strong
nitrogen fixation effect are screened out, and the dominant bacterial genera that are tolerant to
heavy metals or can degrade PAHs are found, which helps the further restoration of the
gangue mountain in this area.