## 3 Results and Discussion
### Microbial Communities in the Soil of 7- and 13-Year-Old Wild-Simulated Ginseng Plantations
[77] reported a 69% increase in soil free phosphorus content following treatment with the strain. Moreover, a variety of _Proteobacteria_, such as _P. rettergeri_ and _P. agglomerans_, contribute to plant growth by solubilizing insoluble phosphorus in the soil. It is believed that the strains of microorganisms from the _Proteobacteria_, which exhibited a higher relative frequency in the soil of the 13-year-old WSG cultivation site in this study, may have enhanced the growth of WSG by solubilizing insoluble phosphorus and increasing the availability of free phosphoric acid to plants. _Hologhage_, which exhibited the highest relative frequency in 7- and 13-year-old WSG plantations at the class level, belong to the phylum _Acidobacteria_, subdivision 8 [78; 79; 80; 81]. They are predominantly found in forest soils under natural conditions and in rhizosphere soils colonized by plants [82; 83; 84; 85]. Microorganisms from the _Hologhage_ class have been identified to play an essential role in regulating carbon and nitrogen cycling in soils, specifically by influencing the C/N ratio through the mineralization of soil components [86; 87; 88]. In a related investigation [89], the microbial communities in soil from ginseng cultivation sites in Korea were examined using pyrosequencing. This analysis revealed that _Proteobacteria_ constituted the highest proportion (30.2%), followed by _Acidobacteria_ (29.2%) and _Chlorofexi_ (18.2%), indicative of trends similar to those observed in the aforementioned study. Likewise, when analyzing the soil microbial community at a ginseng cultivation site, the dominant species were _Proteobacteria_ at 40.9%, followed by _Acidobacteria_ (15.6%) and _Actinobacteria_ (11.6%) in terms of relative frequency [90]. [PERSON] et al. [91] also reported that _Acidobacteria_ and _Proteobacteria_ were dominant phyla in WSG cultivation sites. _Acidobacteria_ are acidophilic bacteria that mainly inhabit acidic soil, and bacteria belonging to _Acidobacteria_ have a mechanism of enzymatic activity that allows them to survive under acidic conditions. Correlation Between Soil Chemical Properties and Wild-Simulated Ginseng Growth Characteristics at the Growing Site  
When analyzing the correlation between soil chemical properties and the growth characteristics of WSG cultivation sites, the exchangeable calcium content and electrical conductivity were found to be significantly and negatively correlated with stem length (\(r=-0.829\), \(p=0.042\)) and flower stalk length (\(r=-0.949\), \(p=0.014\)), respectively (Table 1). Moreover, the content of free phosphoric acid and exchangeable potassium content exhibited significant negative correlations with rhizome length (\(r=-0.636\), \(p=0.048\)) and number of rootlets (\(r=-0.670\), \(p=0.034\)), respectively. Conversely, soil pH demonstrated a significantly positive correlation with total weight (\(r=0.857\), \(p=0.014\)). Generally, significant positive correlations between WSG growth characteristics and soil organic matter, total nitrogen, and cation exchange capacity have been documented [24]; however, in this study, only soil pH and total weight showed significant positive correlations. These findings suggest that the growth of WSG, a perennial plant, may be influenced not only by soil chemical properties but also by diverse site conditions, including climatic conditions, topography, and forest physiognnies, in contrast to annual plants [92; 93]. [PERSON] et al. [94] noted that the abiotic factors influencing the growth and active ingredient content of medicinal plants encompass temperature, light intensity, soil moisture content, and salinity. Additionally, [PERSON] et al. [95] identified soil pH, total nitrogen content, and free phosphoric acid content as primary ecological factors influencing plant growth.