南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (5): 105-112.doi: 10.12302/j.issn.1000-2006.202402009

• 研究论文 • 上一篇    下一篇

郑州市4种园林树木光合特性及其影响因素研究

李喜梅(), 赵君静, 回祎, 黄鑫, 高春雨, 牛雅璇, 廖晓宇, 于晨一   

  1. 河南农业大学林学院,河南 郑州 450002
  • 收稿日期:2024-02-04 修回日期:2024-03-19 出版日期:2024-09-30 发布日期:2024-10-03
  • 作者简介:

    李喜梅(Liximei009@126.com),副教授。

  • 基金资助:
    河南省科技攻关项目(242102320329)

A study on photosynthetic characteristics and influencing factors of four kinds of garden trees in Zhengzhou

LI Ximei(), ZHAO Junjing, HUI Yi, HUANG Xin, GAO Chunyu, NIU Yaxuan, LIAO Xiaoyu, YU Chenyi   

  1. College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2024-02-04 Revised:2024-03-19 Online:2024-09-30 Published:2024-10-03

摘要:

【目的】以女贞(Ligustrum lucidum)、荷花玉兰(Magnolia grandiflora)、悬铃木(Platanus orientalis)、国槐(Styphnolobium japonicum)等4种郑州市常见园林树木为研究对象,比较了生理及环境因子对树木净光合速率的影响,为郑州市绿地生态建设及优选树种提供理论依据。【方法】分别测量4种园林树木在不同季节的光合特性、叶表滞尘量及生长环境的温度和湿度,从生理环境的角度出发,使用双因素方差分析比较了不同季节各树种的光合特性差异,通过广义线性混合模型和结构方程模型探讨了不同因子之间的相互作用及其对树种光合速率的影响。【结果】4种园林树木净光合速率在不同季节均存在显著性差异(P<0.05),国槐的净光合速率显著高于其他树种,各树种夏季的净光合速率显著高于其他季节。生理因子(气孔导度和蒸腾速率)以及环境因素(滞尘量和湿度)与净光合速率有显著的相关关系(P<0.05)。湿度对植物的净光合速率有最显著的直接作用和间接作用,是影响植物光合作用的关键环境因素。【结论】国槐的净光合速率高于其他树种,女贞、荷花玉兰的光合特性与环境、生理因素之间的相关性较强。

关键词: 园林树木, 光合特性, 生理和环境因子, 结构方程, 郑州市

Abstract:

【Objective】 Four common garden trees in Zhengzhou City, including Ligustrum lucidum, Magnolia grandiflora, Platanus orientalis and Styphnolobium japonicum, were selected as the study subjects. Our study provide a theoretical basis for the ecological construction of green space and the selection of tree species of Zhengzhou City from the perspective of physiological environment. 【Method】 Photosynthetic characteristics, leaf surface dust retention, and temperature and humidity of the growth environment were measured in different seasons to reveal the effects of physiological and environmental factors on net photosynthetic rate in the plants. Two-factor analysis of variance was used to compare the differences in photosynthetic characteristics of distinct species in different seasons. The interactions between different factors and their effects on plant photosynthetic rate were explored through generalized linear mixed models and structural equation models. 【Result】 There were significant differences in the net photosynthetic rate of the four garden trees in different seasons (P<0.05),and the net photosynthetic rate of Styphnolobium japonicum was significantly higher than that of other species. The net photosynthetic rate for each species was significantly higher in summer than in the other seasons. Physiological factors (stomatal conductance and transpiration rate) and environmental factors (dust retention and humidity) were significantly correlated with net photosynthetic rate (P<0.05). Humidity had the most significant direct and indirect effects on the net photosynthetic rate of plants and was the key environmental factor affecting plant photosynthesis. 【Conclusion】 The net photosynthetic rate of S. japonicum is higher than that of other tree species, and there is strong correlation between environmental and physiological factors of L. lucidum and M. grandiflora.

Key words: garden trees, photosynthetic characteristics, physiological and enviromental factors, structural modelling, Zhengzhou City

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