关键词: 气象因子, 单木胸径生长, 白桦天然林, 区域效应

Abstract: Ecological characters of ginseng are investigated with reflection spectrum technique. The results show that there are two strong absorption bands for ginseng leaf at 440nm and 680nm, and the ultraviolet light below 380nm is reflected weakly, so the scalding of ginseng is occured Under strong sunlight. Afluorescence reagent which can convert ultraviolet light into red light is mixed into polythene films to simulate the absorption spectra of ginseng leaf, and the radiation spectra of this new film are similar to the latter. After using this new film in ginseng culture, the transmissive light quality of ginseng awning is improved and the photosynthesis of ginseng is promoted. The yield of ginseng and its quality are also increased.

Key words: Ginseng, Ecology, Light quality conversion, natural Betula platyphylla forest, regional effect, meteorological factor, individual tree diameter increment