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    戚嘉敏, 许逸林, 张鹏, 等. 3种木兰科珍稀濒危树种的光合及固碳特性[J]. 华南农业大学学报, 2018, 39(3): 90-95. DOI: 10.7671/j.issn.1001-411X.2018.03.014
    引用本文: 戚嘉敏, 许逸林, 张鹏, 等. 3种木兰科珍稀濒危树种的光合及固碳特性[J]. 华南农业大学学报, 2018, 39(3): 90-95. DOI: 10.7671/j.issn.1001-411X.2018.03.014
    shu
    QI Jiamin, XU Yilin, ZHANG Peng, XI Ruchun, LU Chen, GAO Le. Photosynthetic and carbon sequestration characteristics of three rare and endangered species of Magnoliaceae[J]. Journal of South China Agricultural University, 2018, 39(3): 90-95. DOI: 10.7671/j.issn.1001-411X.2018.03.014
    Citation: QI Jiamin, XU Yilin, ZHANG Peng, XI Ruchun, LU Chen, GAO Le. Photosynthetic and carbon sequestration characteristics of three rare and endangered species of Magnoliaceae[J]. Journal of South China Agricultural University, 2018, 39(3): 90-95. DOI: 10.7671/j.issn.1001-411X.2018.03.014
    shu

    3种木兰科珍稀濒危树种的光合及固碳特性

    Photosynthetic and carbon sequestration characteristics of three rare and endangered species of Magnoliaceae

      摘要
    • 摘要:
      目的  阐明木兰科Magnoliaceae珍稀濒危树种光合及固碳特性，为其保护利用提供理论技术依据。
      方法  以亮叶木莲Manglietia lucida、香木莲M. aromatica和开甫木莲M. kaifui为研究对象，采用LI-6400便携式光合仪对其光合参数特征进行测定分析，并对其固碳释氧量进行估算，综合评价其适应性及生态效应。
      结果  3个树种的净光合速率日变化在7月份表现为双峰型，在10月份表现为单峰型。其光合效率在7月份为：开甫木莲(5.35 μmol·m–2·s–1)>亮叶木莲(2.87 μmol·m–2·s–1)>香木莲(2.78 μmol·m–2·s–1)；在10月份为：香木莲(6.46 μmol·m–2·s–1)>开甫木莲(6.24 μmol·m–2·s–1)>亮叶木莲(5.74 μmol·m–2·s–1)。3个树种的固碳释氧量为：开甫木莲>香木莲>亮叶木莲。
      结论  参试植物的生长在10月份比7月份更为旺盛；开甫木莲对强光的利用能力最佳，香木莲对弱光的利用能力最佳；固碳释氧能力最强的植物为开甫木莲。

       

      Abstract:
      Objective  To illuminate the photosynthetic and carbon sequestration characteristics of rare and endangered species of Magnoliaceae, and provide theory and technology bases for their conservation and utilization.
      Method  Manglietia aromatica, M. lucida and M. kaifui were studied with LI-6400 portable photosynthetic system measuring photosynthetic characteristics. Their carbon sequestration and oxygen release amounts were estimated to evaluate comprehensively their adaptabilities and ecological effects.
      Result  The diurnal variations of net photosynthetic rates of three species displayed bimodal curves with obvious midday depression in July and unimodal curves in October. The daily mean values of net photosynthetic rates of three species in July were 5.35 μmol·m–2·s–1 (M. kaifui), 2.87 μmol·m–2·s–1 (M. lucida) and 2.78 μmol·m–2·s–1 (M. aromatica) successively, and the values in October were 6.46 μmol·m–2·s–1 (M. kaifui), 6.24 μmol·m–2·s–1 (M. aromatica) and 5.74 μmol·m–2·s–1 (M. lucida) respectively. The carbon sequestration and oxygen release amount of three species was in order of M. kaifui>M. aromatica>M. lucida.
      Conclusion  The test plants display more vigorous growth in October than July. M. kaifui has the best capacity of utilizing strong light while M. aromatica has the best capacity of utilizing weak light. M. kaifui has the best carbon sequesteration and oxygen release abilities among three species.

       

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