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华北高唐地区4种常见树木叶片水力学和等水特性分析

冉苒 张祥雪 伍敏 贾黎明

冉苒, 张祥雪, 伍敏, 贾黎明. 华北高唐地区4种常见树木叶片水力学和等水特性分析[J]. 北京林业大学学报. doi: 10.12171/j.1000-1522.20210093
引用本文: 冉苒, 张祥雪, 伍敏, 贾黎明. 华北高唐地区4种常见树木叶片水力学和等水特性分析[J]. 北京林业大学学报. doi: 10.12171/j.1000-1522.20210093
Ran Ran, Zhang Xiangxue, Wu Ming, Jia Liming. Analysis of leaf hydraulics and iso/anisohydry traits of four common trees in Gaotang area of North China[J]. Journal of Beijing Forestry University. doi: 10.12171/j.1000-1522.20210093
Citation: Ran Ran, Zhang Xiangxue, Wu Ming, Jia Liming. Analysis of leaf hydraulics and iso/anisohydry traits of four common trees in Gaotang area of North China[J]. Journal of Beijing Forestry University. doi: 10.12171/j.1000-1522.20210093

华北高唐地区4种常见树木叶片水力学和等水特性分析

doi: 10.12171/j.1000-1522.20210093
基金项目: 国家自然科学基金项目(31670625),城乡生态环境北京实验室-北京乔木类乡土植物筛选及高效繁育技术(200-67191003)
详细信息
    作者简介:

    冉苒。主要研究方向:植物生理的物理过程。Email:834838985@qq.com 地址:100083 北京市海淀区清华东路35号北京林业大学理学院

    责任作者:

    张祥雪,教授。主要研究方向:植物生理的物理过程。Email:zxx@bjfu.edu.cn  地址:同上

  • 中图分类号: Q6

Analysis of leaf hydraulics and iso/anisohydry traits of four common trees in Gaotang area of North China

  • 摘要:   目的  为研究相同环境中不同树种采取的水分适应策略多样性,在山东省高唐地区选取分别在根系分布深度、材性和生长速度方面有着较大差异的4个典型适生树种,元宝枫、紫叶李、毛白杨和刺槐。  方法  研究比较了这4个树种叶片的水力学特性和等水评价,其中水力学特性包括栓塞脆弱性参数,压力−容积(PV)曲线参数,水力结构和功能性状。  结果  结果表明,适应相同的环境的不同树种采取的水分适应策略差异较大,其中紫叶李和元宝枫的水分适应策略较为保守,而刺槐和毛白杨则采取了较为冒险的水分适应策略:浅根性散孔材速生树种紫叶李,其叶片栓塞抗性最强(栓塞脆弱性P50为−2.67 MPa),用水安全性非常高(水力安全边际HSM为1.57 MPa),水分适应策略较为保守;浅根性散孔材慢生树种元宝枫,其叶片偏向于等水调节(水力学面积为0.049 MPa2),可以在水分胁迫时更早的关闭气孔来维持叶片水势和膨压稳定,由于P50比较高而HSM比较低,表现出了低抗栓塞能力和低水力安全性,叶水势的调节范围较窄,但其高Huber值(Hv)显示其具有较高的抗旱性,采用了较为保守的水分适应策略;浅根性环孔材速生树种刺槐,其叶片偏向不等水调节方式,抗栓塞能力较强,叶水势调节范围较广,水分适应策略较为冒险;深根性散孔材速生树种毛白杨,栓塞抗性不强,用水安全系数接近极限(HSM为0.0015 MPa),其叶片维持膨压能力最强(膨压损失点水势ψtlp为−3.36 MPa),确保其在缺水情况下从土壤深处获取水分,采取的水分适应策略较为冒险。  结论  综上所述,树木可以采用不同的水力学特性,等水特性,形态结构特征,应用不同的水分适应策略来适应相同的环境,这种水分适应策略的多样性有利于维持生态系统的稳定性。

     

  • 图  2  试验树种的叶片脆弱性曲线

    Figure  2.  Leaf vulnerability curves of test trees

    图  1  试验树种的PV曲线参数比较

    误差线为标准误差,不同字母表示差异显著,显著性P < 0.05。 Error bars are standard errors, different letters indicate significant differences, significance P < 0.05.

    Figure  1.  PV curve parameter diagram of test trees

    图  3  试验树种ψPDψMD的关系

    黑色直线为1∶1线,括号中的数字是计算的水景面积。The black straight line is a 1∶1 line, numbers in parentheses are calculated hydroscape areas.

    Figure  3.  The relationship diagram of experimental tree species ψPD and ψMD

    表  1  试验树种的基本特性

    Table  1.   Basic characteristics of test trees

    树种 Tree species根系分布深度 Root distribution depth材性 Materiality生长速度 Speed of growth
    元宝枫 Acer truncatum 浅根系 Shallow root system 散孔材 Diffuse porous wood 慢生树种 Low growing species
    紫叶李 Prunus cerasifera 浅根系 Shallow root system 散孔材 Diffuse porous wood 速生树种 Fast growing species
    毛白杨 Populus tomentosa 深根系 Deep root system 散孔材 Diffuse porous wood 速生树种 Fast growing species
    刺槐 Robinia pseudoacacia 浅根系 Shallow root system 环孔材 Ring porous wood 速生树种 Fast growing species
    下载: 导出CSV

    表  2  试验树种的栓塞脆弱性参数

    Table  2.   Embolism vulnerability parameters of test tree species

    树种
    Tree species
    P50/MPaHSM/MPaKleaf-max/
    (mmol·m−2·s−1·MPa−1
    元宝枫 A. truncatum −0.774 0.362 9.89
    紫叶李 P. Cerasifera −2.668 1.572 10.21
    毛白杨 P. tomentosa −1.355 0.0015 7.60
    刺槐 R. pseudoacacia −1.966 0.978 5.51
    下载: 导出CSV

    表  3  试验树种的水力结构及功能性状

    Table  3.   Hydraulic structure and functional properties of test trees

    树种
    Tree species
    叶比导率
    Leaf specific conductivity
    (LSC)/(kg·Mpa−1·min−1·m−1
    Huber 值
    Huber value
    (HV)
    比叶面积
    Specific leaf area
    (SLA)/cm2·g−1
    叶干物质含量
    Leaf dry matter content
    (LDMC)
    元宝枫 A. truncatum 0.005 ± 0.002 a 0.063 ± 0.001 a 126.0 ± 7.6 a 0.36 ± 0.01 a
    紫叶李 P. Cerasifera 0.010 ± 0.001 a 0.015 ± 0.002 c 205.4 ± 13.6 b 0.28 ± 0.03 a
    毛白杨 P. tomentosa 0.014 ± 0.001 a 0.027 ± 0.001 b 85.1 ± 3.8 a 0.39 ± 0.03 a
    刺槐 R. pseudoacacia 0.032 ± 0.004 b 0.007 ± 0.001 d 244.7 ± 24.7 b 0.29 ± 0.02 a
    注:均值 ± 标准误,不同字母表示差异显著,显著性P < 0.05。Notes: mean ± standard error, different letters indicate significant differences, significance P < 0.05.
    下载: 导出CSV
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  • 收稿日期:  2021-03-15
  • 修回日期:  2021-04-14
  • 网络出版日期:  2021-06-25

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