Abstract: Epimedium pubescens and soil samples were collected from the Betula albosinensis community (communityⅠ), Cyclobalanopsis glauca var. gracilis community (community Ⅱ), and Cinnamomum longepaniculatum community (community Ⅲ) in Tangjiahe Nature Reserve in August 2009, with the total flavonoids and icariin contents in E. pubescens samples measured by high performance liquid chromatography and UVspectrophotometer, and the relationships between these contents and soil parameters analyzed. Among the plant organs of E. pubescens, leaf had the highest contents of total flavonoids and icariin, while stem had the lowest one. The total flavonoids and icariin contents of E. pubescens were significantly higher in community Ⅰ［(5.32±0.23)%, (0.47±0.05)%］than in communities Ⅱ［(4.06±0.03)%, (0.32±0.01)%］and Ⅲ［(4.15±0.07)%, (0.28±0.09)%］(P<0.05), and negatively correlated with soil total nitrogen and alkali-hydrolyzable nitrogen (P<0.05) but positively correlated with soil pH (P<0.01), suggesting that the soil with lower level of nitrogen and higher level of acidity in communityⅠcould enhance the total flavonoids and icariin contents of E. pubescens.

Key words: community type, Epimedium pubescens, total flavonoids, icariin, soil factor, Vigna angularis, shading, photosynthetic characteristics, photosynthetic pigment, growth, yield.