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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (6): 956-960.doi: 10.7525/j.issn.1673-5102.2018.06.020

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Stoichiometry Characteristics of Typical Halophytes in Luanhe Estuary Wetland

TAN Hai-Xia1, JIN Zhao-Guang2, SUN Fu-Qiang2, PENG Hong-Li1, YANG Zhuo1, GENG Shi-Gang1,3   

  1. 1. Hebei University of Environmental Engineering, Qinhuangdao 066000;
    2. Management Office of Changli Golden Coast National Nature Reserve, Qinhuangdao 066000;
    3. Yanshan University, Qinhuangdao 066000
  • Received:2018-08-28 Online:2018-11-15 Published:2018-11-01
  • Supported by:
    Sci-tech Project of Hebei(15273307);Important projects in social science of Hebei(ZD201710)

Abstract: Studying the stoichiometry of halophytes will be beneficial to restoration of the vegetation in the coastal wetlands. The research object were four typical halophytes in the luanhekou. The stoichiometric characteristics of C, N and P in different plants and different vegetative organs were analyzed. Results show that:Mean change range of carbon, nitrogen and phosphorus contents (212.40-291.38, 9.68-14.43 and 0.86-1.6 g·kg-1) were significant (P<0.05),possibly indicating different nutrient utilization strategies. The order of C content of different vegetative organs was leaf > root > stem, indicating low photosynthetic rate and strong defense ability. C:N and C:P of Aeluropus sinensis, Phragmites communis and Tamarix chinensis Lour were slightly lower than the global average of 22.5 and 232. There was a significant positive correlation between N and P (P<0.01). N is major restrictive factor for plants in the research area. There was a significant positive correlation between leaf N and leaf P, root N, root C,root P (P<0.01); leaf P and root N, root P differed significantly (P<0.01). There was a strong coordination between the root and the leaves of the vegetative organs to adapt to the salinization of the estuarine wetland.

Key words: Luanhe estuary wetland, halophytes, ecological stoichiometry

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