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大花序桉心边材的径向和轴向的变异

罗佳 马若克 韦鹏练 符韵林

罗佳, 马若克, 韦鹏练, 符韵林. 大花序桉心边材的径向和轴向的变异[J]. 北京林业大学学报, 2021, 43(4): 132-140. doi: 10.12171/j.1000-1522.20210021
引用本文: 罗佳, 马若克, 韦鹏练, 符韵林. 大花序桉心边材的径向和轴向的变异[J]. 北京林业大学学报, 2021, 43(4): 132-140. doi: 10.12171/j.1000-1522.20210021
Luo Jia, Ma Ruoke, Wei Penglian, Fu Yunlin. Variation on radial and axial of heartwood and sapwood in Eucalyptus cloeziana[J]. Journal of Beijing Forestry University, 2021, 43(4): 132-140. doi: 10.12171/j.1000-1522.20210021
Citation: Luo Jia, Ma Ruoke, Wei Penglian, Fu Yunlin. Variation on radial and axial of heartwood and sapwood in Eucalyptus cloeziana[J]. Journal of Beijing Forestry University, 2021, 43(4): 132-140. doi: 10.12171/j.1000-1522.20210021

大花序桉心边材的径向和轴向的变异

doi: 10.12171/j.1000-1522.20210021
基金项目: 国家自然科学基金项目(31870540)
详细信息
    作者简介:

    罗佳。主要研究方向:木材科学。Email:18284905882@163.com 地址:530004 广西壮族自治区南宁市西乡塘区大学东路100号广西大学林学院

    责任作者:

    符韵林,博士,教授。主要研究方向:木材科学。Email:fylin@126.com 地址:同上

  • 中图分类号: S781

Variation on radial and axial of heartwood and sapwood in Eucalyptus cloeziana

  • 摘要:   目的   探究大花序桉心材与边材在树龄、横截面去皮直径和树高,即径向和轴向的变异规律,明确大花序桉心材发育过程中心、边材量的变化趋势,继而为培育大径级大花序桉以及木材高效利用提供科学依据。   方法   以广西东门林场5年、17年、29年、35年生的大花序桉为研究对象,测定其东、西、南、北4个方向的横截面去皮直径、去皮半径、心材半径、边材宽度,并拟合心、边材量与树龄、横截面去皮直径、树高之间的回归方程,研究大花序桉心、边材量轴向和径向的变异规律。   结果   心材半径和心材面积随着树龄的增加而增大,而边材宽度仅在5 ~ 29年之间变化较大,边材面积随树龄的变化不明显。在不同树龄间边材面积差异不显著(P > 0.05),心材半径、心材面积和边材宽度均存在显著差异(P < 0.05)。横截面心材量随着横截面去皮直径的增加而增加,但横截面边材量与横截面去皮直径相关性较弱。当横截面去皮直径约为4.66 cm时,大花序桉开始形成心材,之后树干横截面去皮直径每生长1 cm,心材半径就增加约0.52 cm。各树龄大花序桉心材半径、心材面积和边材面积都随着树高的增加而减小,在树木基部最大,接近树梢处明显减小,边材宽度在树高为1.0 ~ 5.3 m时有一定的波动,在树高5.3 m以上相对恒定。   结论   心材量与树龄、横截面去皮直径呈显著的正相关关系,与树高呈负相关关系。研究认为35年生大花序桉仍具有较大的生长潜力,可进一步培育大径级大花序桉。

     

  • 图  1  大花序桉圆盘

    Figure  1.  Eucalyptus cloeziana discs

    图  2  心、边材量与树龄的关系

    Figure  2.  Relationship between tree age and heartwood variables as well as sapwood variables

    图  3  心、边材量与横截面去皮直径的关系

    Figure  3.  Relationship between stem cross-sectional peeling diameter and heartwood variables as well as sapwood variables

    图  4  心、边材量的轴向变异

    Figure  4.  Axial variation of heartwood and sapwood amount

    图  5  平均横截面去皮半径、心材半径与边材宽度随着树高的变化

    Figure  5.  Mean stem cross-sectional peeling diameter, heartwood radius and sapwood width change with tree height

    图  6  不同树龄心材半径与边材宽度比值随树高的变化

    Figure  6.  Ratio of heartwood radius to sapwood width of different ages varies with tree height

    表  1  样本基本信息

    Table  1.   Basic information of sample trees

    树龄/a
    Tree age/year
    样本数量
    Sample tree number
    圆盘总数
    Total number of disc
    DBH/m
    树高
    Tree height/m
    枝下高
    Height to crown base/m
    5 3 22 0.15 ± 0.02 16.90 ± 2.07 6.23 ± 1.14
    17 3 41 0.21 ± 0.03 31.03 ± 1.40 13.57 ± 3.07
    29 3 43 0.26 ± 0.04 32.77 ± 3.78 14.87 ± 4.90
    35 3 41 0.30 ± 0.02 32.7 ± 2.27 10.83 ± 6.20
    下载: 导出CSV

    表  2  不同树龄的心、边材量

    Table  2.   Amount of heartwood and sapwood of different tree ages

    树龄/a
    Tree age/
    year
    心材半径
    Heartwood
    radius/cm
    心材面积
    Heartwood
    area/cm2
    心材率
    Heartwood
    rate/%
    心材半径/边材宽度
    Heartwood radius/
    sapwood width (Rh/Ws)
    边材宽度
    Sapwood
    width/cm
    边材面积
    Sapwood
    area/cm2
    5 4.72 70.76 34.76 1.39 3.41 133.53
    17 6.08 115.48 63.35 5.95 1.38 69.98
    29 9.38 287.77 76.33 8.72 1.28 98.13
    35 13.26 600.22 85.96 9.15 1.46 98.07
    下载: 导出CSV

    表  3  心材量与树龄的回归方程

    Table  3.   Regression equations of heartwood amount and tree age

    自变量 Independent variable因变量 Dependent variable回归方程 Regression equationR2P
    树龄/a Tree age/year 心材半径 Heartwood radius/cm y = 0.26x + 2.72 0.755 3 < 0.05
    树龄/a Tree age/year 心材面积 Heartwood area/cm2 y = 0.02x2.92 0.831 2 < 0.05
    树龄/a Tree age/year 心材率 Heartwood rate/% y = 0.02x + 0.29 0.855 8 < 0.05
    下载: 导出CSV

    表  4  心材量与横截面去皮直径的回归方程

    Table  4.   Regression equations of heartwood amount and stem cross-sectional peeling diameter

    自变量 Independent variable因变量 Dependent variable回归方程 Regression equationR2
    横截面去皮直径 Stem cross-sectional peeling diameter/cm 心材半径 Heartwood radius/cm y = 0.52x – 2.44 0.966 6
    横截面去皮直径 Stem cross-sectional peeling diameter/cm 心材面积 Heartwood area/cm2 y = 0.11x2.52 0.955 9
    下载: 导出CSV

    表  5  心材半径、边材面积、心材面积与树龄的回归方程

    Table  5.   Regression equations of heartwood radius, sapwood area, heartwood area and tree age

    树龄/a Tree age/year心材半径 Heartwood radius /cm心材面积 Heartwood area/cm2边材面积 Sapwood area/cm2
    5 y = −0.35x + 5.27, R2 = 0.984 7 y = −8.11x + 84.19, R2 = 0.946 7 y = −7.16x + 128.78, R2 = 0.941 4
    17 y = −0.29x + 8.91, R2 = 0.975 6 y = −8.69x + 208.61, R2 = 0.920 3 y = −4.43x + 158.13, R2 = 0.972 5
    29 y = −0.30x + 11.29, R2 = 0.970 0 y = −15.24x + 387.28, R2 = 0.9269 y = −2.92x + 137.51, R2 = 0.960 6
    35 y = −0.43x + 13.85, R2 = 0.990 1 y = −25.70x + 590.72, R2 = 0.958 0 y = −2.54x + 99.26, R2 = 0.994 9
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-01-21
  • 修回日期:  2021-02-27
  • 网络出版日期:  2021-03-31
  • 刊出日期:  2021-04-30

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