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Bulletin of Botanical Research ›› 2017, Vol. 37 ›› Issue (5): 738-743.doi: 10.7525/j.issn.1673-5102.2017.05.014

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Effects of Shading and Nitrogen Addition on the Growth and C-N Balance of Fritillaria unibracteata

GUO Hai-Xia1, XU Bo3, SHI Fu-Sun2, WU Yan2   

  1. 1. Chengdu Normal University, Chengdu 611130;
    2. Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041;
    3. Aba Teachers University, Wenchuan 623002
  • Received:2016-12-21 Online:2017-09-15 Published:2017-09-15

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.

Key words: Fritillaria unibracteata, shading, nitrogen addition, biomass allocation, C-N balance

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