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(A) Changes in the ginsenoside Rg1, Re and Ro contents in the Panax ginseng root according to the cultivation year. * p < 0.05, one-way ANOVA (compared with the Year 4); (B) Ratio of ginsenosides Ro and Re in different cultivation years; (C) Changes of ginsenoside Rg1 and Re contents in Panax ginseng root with different collection month. * p < 0.05, independent sample t-test; (D) Ratio of ginsenosides Rg1 and Re in different collection months.
