Plant Community and Restoration of Nanjido, a Representative Nonsanitary Landfill in South Korea

초록

Vegetation and soil analysis of Nanjido, a representative nonsanitary landfill in South Korea were conducted to investigate the colonization status of plant community and to suggest restoration alternatives by comparing it with near by forest control sites. The vegetation of Nanjido was surveyed by quadrat method(size: 10×10 m2) and sand, silt, clay, pH, electric conductivity, organic matter, total-N, P, K, Ca, and Mg of soils were quantitavely analyzed. The coverage of all recorded species were ordinated by soil chemical variables through CCA(Canonical Correspondence Analysis). Commonly found tree species(appeared in all quadrats of Nanjido landfill) were Salix babylinica, Platanus orientalis, Rosa multiflora, Prunus persica, Albizzia julibrissin, Indigofera pseudo-tinctoria, Robinia pseudo-acacia, Amorpha fruticosa, Ailanthus altissima, Forsythia koreana, and Paulownia tomentosa. Quercus mongolica as a late successional species were recorded in Nanjido landfill. The amount of pH, electric conductivity, P, Ca, and Mg in soils of Nanjido landfill was significantly greater than that in soils of control sites(P < 0.05). In CCA ordination space, Nanjido sites were clustered in less acidic soils rich in Ca and Mg contents while control sites in acidic soils in poor in P contents. therefore, the study results shows that landfill sites are changed to a stable late succession stage if soil chemical contents of landfill sites transformed into that of control sites.