Abstract: In order to check how Fritillaria unibracteata Hsiao et K.C.Hsia adjusts to resources variation, a controlled field experiment was set, and F.unibracteata's responses of growth and C-N balance to shading and nitrogen addition were examined. F.unibracteata was highly responsive to shading and nitrogen addition. Nitrogen content in leaf and root showed significant increase after shading and nitrogen addition, which induced the decrease of C:N in leaf and root. The ratio of leaf biomass to root biomass(R₁) was significantly increased(P<0.05) under shading treatment, while there was no obvious change of R₁ under nitrogen-addition treatment. Finally, there were significant correlations(P<0.01) between nitrogen content, C:N and total plant biomass, leaf-root biomass ratio. Therefore, C-N balance in F.unibracteata would be a better index of resource strategy.