关键词: 温度；西洋参；生长发育；产量；品质；秦岭山区

Abstract: The effect of temperature on the growing period, the yield and quality of P.quinquefolium L. was studied. The results show that the optimum temperature is 14￣18℃ for plant growth and is 12 4￣13.2℃ for root growth of P. quinquefolium L. The Qinling mountain area where the mean temperature in growing season is over 17.5℃ is advantageous to blossom and fruit bearing, but is not good enough to root growth. It can be used as a base area for seed production. The area where the mean temperature is 12.4￣16.0℃ during the growing seasons is beneficial to root growth and the area can be used as a commodity ginseng base. In the area of low elevation, P. quinquefolium L. shoud be planted in the northeast and northwest slope. In the area of high elevation it may be planted in every slope and plain in Qinling mountain.

Key words: Temperature, Temperature, P. quinquefolium L., Growth and development, Yield and quality, Qinling mountain