Chin J Plant Ecol ›› 2017, Vol. 41 ›› Issue (1): 136-146.DOI: 10.17521/cjpe.2016.0026

Special Issue: 中国灌丛生态系统碳储量的研究 生态化学计量

• Research Articles • Previous Articles     Next Articles

Carbon, nitrogen and phosphorus stoichiometry of Myrica nana in Yunnan, China

Kai-Wen SU1, Lu-Hong CHEN1, Wei ZHENG1, Yao PAN2, Hua-Jun YIN3, He-De GONG1,*()   

  1. 1Ecotourism Faculty, Southwest Forestry University, Kunming 650224, China

    2Asia-Pacific Network For Sustainable Forest Management And Rehabilitation Kunming Training Center, Kunming 650224, China
    and
    3Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
  • Received:2016-01-17 Accepted:2016-12-25 Online:2017-01-10 Published:2017-01-23
  • Contact: He-De GONG
  • About author:KANG Jing-yao(1991-), E-mail: kangjingyao_nj@163.com

Abstract:

Aims Carbon (C), nitrogen (N) and phosphorus (P) play important roles in plant growth and physiological functions. We aimed at exploring the intrinsic relationships of C, N and P in Myrica nana—a common shrub in Yunnan Province—as well as their relationships with pant biomass and soil nutrients.
Methods We measured the concentration of C, N and P of M. nana from 29 sites for their magnitudes and correlations with soil nutrients.
Important findings 1) The arithmetic mean value of C, N and P concentration in the roots, stems and leaves of M. nana was 45.94%, 0.54%, 0.03%, and 46.32%, 0.58%, 0.03%, and 49.05%, 1.70%, 0.06%, respectively. C, N and P concentrations in the leaves were significantly higher than those in the roots and the stems. The C:N:P in roots, stems and leaves was 1531:18:1, 1544:19:1, and 818:10:1, respectively. 2) The C concentration and N:P in leaves of M. nana decreased with the increase of biomass of M. nana; the leaf C concentration was significantly correlated with biomass (p < 0.01), while the correlation between N:P and biomass was not significant (p > 0.05). The leaf N increased with the increase of plant biomass, the P was significantly correlated with biomass (p < 0.05), but the correlation between N concentration and biomass was not significant (p > 0.05). N:P in leaves was 34.2, suggesting that plant growth was limited by P. 3) C, N and P concentration in the roots were significantly correlated with soil P (p < 0.05), with N, P concentrations correlated with soil P positively (p < 0.01) and C negatively (p < 0.05). C concentration in the stems was significantly and negatively correlated with soil C, N, with significant correlation with C, N, and P concentration (p < 0.01). P concentration in the stems was significantly and positively correlated with soil P concentration (p < 0.01), while leaf P significantly and positively correlated with soil C, N and P (p < 0.01); leaf C concentration was significantly and negatively correlated with soil P (p < 0.01).

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Key words: Myrica nana, carbon, nitrogen, phosphorus, stoichiometry, biomass, soil