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结合模拟试验，对林下人参的生理活动及生长过程与林内生态因子的关系进行 了观测研究．结果表明，林内光照、水分、温度等因子与林下人参生长的关系极为密切．一 般林内光照在中等条件下，即相对光照在１０～３５％左右．林分郁闭度约０．６～０．８，土壤含 水量在 ３５～４０％时人参生长最好；林下人参的物候进程及生长与温度的关系密切．林内 温度在５℃左右人参芽胞开始萌动，１５℃左右地上茎高生长进入速生期，６月上旬生长停 止．因此，人为调节各种生态因子在适宜的范围内有利于林下人参的生长．
Combined with the simulation test, the physiological activities of Ginseng undergrowth and the relationship between the growth process and the ecological factors in the forest were studied. The results showed that the light, water, temperature and other factors in the forest were closely related to the growth of Ginseng under the forest. The general forest light at medium conditions, that is, the relative light at about 10 ~ 35%. The canopy density is about 0.6 ~ 0.8, while the soil water content is 35 ~ 40%, the ginseng growth is the best. The phenology process and the growth of the ginseng under the forest are closely related to the temperature. The gynoecium sprout began to germinate when the temperature in the forest was about 5 ℃. The stem height at about 15 ℃ grew rapidly and stopped growing in early June. Therefore, man-made adjustment of various ecological factors in the appropriate range is conducive to the growth of understory ginseng.