Wild-simulated ginseng (WSG) is naturally cultivated in forest environment without any artificial facilities or chemicals. Soil property is one of the major factors affecting the growth and active compound synthesis of vegetation. Therefore, growth characteristics and ginsenoside contents of WSG can be affected by soil properties of the cultivation field. Therefore, the aim of this study was to investigate correlations among soil properties, growth characteristics, and ginsenoside contents of WSG with different ages using Spearman’s coefficient analysis method. It was found that most of growth characteristics of WSG except for rhizome length were significantly increased in 7-year-old WSG for both the above-ground part and root part. Soil pH, and exchangeable cations (Ca, Mg) of 13-year-old WSG cultivation site were significantly higher than those of 4-year-old WSG. However, available phosphate of 4-year-old WSG soil was higher than that of 13-year old WSG soil. Contents of ginsenosides of 4-year-old WSG were higher than those of 13-year-old WSG in the above-ground part. Otherwise, in the root part, contents of ginsenosides of 13-year-old WSG were higher than those of 4-year-old WSG. In correlation analysis, growth characteristics of 4-year-old WSG were correlated with more ginsenoside types. Correlations between soil properties and ginsenoside contents in leaves and roots of WSG with the same age also differed. These results suggest that soil properties play essential role in growth and ginsenoside synthesis of WSG. Based on results of this study, growth characteristics, soil properties, and ginsenoside contents of WSG in different WSG cultivation sites need to be further investigated to identify the most suitable cultivation site for WSG.

Wild-simulated ginseng (WSG, Panax ginseng C.A. Meyer) must be cultivated in mountainous forests without installation of artificial facilities or treatment of chemicals. Because cultivation of these medicinal plants requires a long-term period, soil properties and rhizobacteria are known as major factors affecting their growth. This study was aimed to investigate correlations of soil bacterial community with soil chemical properties and growth of 10-year-old WSG. Most of the growth characteristics of WSG were higher in southern region than in northern regions, while leaflet length and leaflet width of WSG were higher in northern regions. In all WSG cultivation sites, the most dominant phyla were Proteobacteria and Acidobacteria in the bacterial community. In Principal component analysis (PCA), soil bacterial community was affected by exchangeable cations (calcium, magnesium), soil pH, total nitrogen, cation exchange capacity, and organic matter. Soil pH was the most effective factor in this study because all studied sites were acidic soils. In spearman’s coefficient analysis, 9 of 13 growth characteristics of WSG showed significantly positive correlation with the relative abundance of Actinobacteria, while rhizome length and number of rootlets showed significant negative correlations with population of Acidobacteria. Therefore, growth characteristics of WSG in different cultivation sites can be affected by various soil environmental factors. These results can help foresters find suitable cultivation sites for WSG.

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The aim of this study was to investigate the correlation between growth characteristics and ginsenoside contents of 4year-old wild-simulated ginseng cultivated in different regions. Most of the soil properties except for available phosphate showed significantly higher in Pyeongchang than in other cultivation sites. The growth characteristics except for root length and number of rootlets showed significantly higher in Pyeongchang than in other cultivation sites. In the case of 8 ginsenoside contents, the content of F2-AS was significantly higher in Muju than in other cultivation sites and the content of F1 in Yeongju was significantly high. In Yeongwol, the contents of Rb1 and Re-p were significantly high and the content of Ro in Pyeongchang showed significantly higher than in other cultivation sites. Root length and soil pH did not show a significant correlation with any soil properties and growth characteristics of wild-simulated ginseng, respectively. Most of the growth characteristics showed significantly positive correlations with electrical conductivity, organic matter content, total nitrogen content, exchangeable cations (K + , Ca 2+ , Mg 2+ ), and cation exchange capacity. Rb1 and Re-p showed significantly negative correlations with most of the growth characteristics of wildsimulated ginseng except for the number of rootlets. Ro showed a significantly positive correlation with stem length, number of leaflets per stem, leaflet length, leaflet width, and root diameter. The results of this study probably will help to provide useful information on the establish a quality standard by investigate correlation analysis between growth characteristics and ginsenoside content of 4-year-old wild-simulated ginseng. KeywordsCorrelation analysis • Ginsenoside • Growth characteristics • Panax ginseng C.A. Meyer • Wild-simulated ginseng Yurry Um (

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