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密度、灌草盖度和树干形态对油松人工风景林林内景观指数的影响

李苹 毛斌 许丽娟 吴鞠 刘海轩 徐程扬

李苹, 毛斌, 许丽娟, 吴鞠, 刘海轩, 徐程扬. 密度、灌草盖度和树干形态对油松人工风景林林内景观指数的影响[J]. 北京林业大学学报, 2018, 40(10): 115-122. doi: 10.13332/j.1000-1522.20180067
引用本文: 李苹, 毛斌, 许丽娟, 吴鞠, 刘海轩, 徐程扬. 密度、灌草盖度和树干形态对油松人工风景林林内景观指数的影响[J]. 北京林业大学学报, 2018, 40(10): 115-122. doi: 10.13332/j.1000-1522.20180067
Li Ping, Mao Bin, Xu Lijuan, Wu Ju, Liu Haixuan, Xu Chengyang. Effects of density, shrub-herb coverage and trunk shape on the in-forest patch index of planted Pinus tabuliformis forests[J]. Journal of Beijing Forestry University, 2018, 40(10): 115-122. doi: 10.13332/j.1000-1522.20180067
Citation: Li Ping, Mao Bin, Xu Lijuan, Wu Ju, Liu Haixuan, Xu Chengyang. Effects of density, shrub-herb coverage and trunk shape on the in-forest patch index of planted Pinus tabuliformis forests[J]. Journal of Beijing Forestry University, 2018, 40(10): 115-122. doi: 10.13332/j.1000-1522.20180067

密度、灌草盖度和树干形态对油松人工风景林林内景观指数的影响

doi: 10.13332/j.1000-1522.20180067
基金项目: 

林业公益性行业科研专项 2011BAD38B0303

详细信息
    作者简介:

    李苹。主要研究方向:城市林业。Email:15600990261@163.com  地址:100083北京市海淀区清华东路35号北京林业大学林学院

    责任作者:

    徐程扬,教授。主要研究方向:公益林、城市林业培育理论与技术。Email:cyxu@bjfu.edu.cn  地址:同上

  • 中图分类号: S731.2

Effects of density, shrub-herb coverage and trunk shape on the in-forest patch index of planted Pinus tabuliformis forests

  • 摘要: 目的林分密度、灌草盖度和树干形态是影响风景林林内景观质量的重要因子,本文从色彩斑块景观指数变化特点角度,对北京油松人工风景林林内景观质量形成机理进行探讨。方法通过林内景观画面的色彩斑块结构特点解析,研究了林分密度、灌草盖度和树干形态变化对林内景观指数的影响。结果林分密度对斑块分裂指数(SPI)有显著影响,SPI随林分密度的增大而减小;灌草盖度对聚集度指数(AI)、景观形状指数(LSI)有显著影响,随灌草盖度增大两个指数均增大;树干形态对辛普森均匀度指数(SIEI)有极显著影响,对LSI有显著影响,LSI在树干弯曲与通直并存时数值较大,SIEI在树干通直时数值较大;林分密度与灌草盖度的交互作用对LSI、SPI、SIEI有显著影响,3个指数随林分密度的增大而减小,随灌草盖度的增大而增大。林分密度与树干形态的交互作用对LSI、SIEI有显著影响,两个指数随林分密度的增大而减小,LSI在树干弯曲与通直并存时数值较大,SIEI在树干通直时数值较大;灌草盖度与树干形态的交互作用对SIEI有显著影响,SIEI随灌草盖度的增大而增大,在树干弯曲与通直并存时数值较大。结论林分密度、灌草盖度、树干形态及其交互作用均对林内景观指数有显著影响。主要原因是结构要素的变化引起视域内斑块数量以及形状的改变从而引起斑块指数的变化。

     

  • 图  1  美景度值与斑块指数的简相关系数比较

    LPI.最大斑块指数;LSI.景观形状指数;ACOV.斑块面积变异系数;CON.蔓延度;PLA.相似斑块邻接比例;SPI.斑块分裂指数;SHDI.Shannon多样性指数;SIEI.辛普森均匀度指数;AI.聚集度指数。下同。

    Figure  1.  Comparison in simple correlation coefficient between scenic beauty value and patch indices

    LPI, largest patch index; LSI, landscape shape index; ACOV, coefficient variability of patchs area; CON, contagion index; PIA, proportion of like adjacencies; SPI, splitting index; SHDI, Shannon's diversity index; SIEI, Simpson's evenness index; AI, aggregation index. The same below.

    图  2  林分密度、灌草盖度、树干形态对景观斑块指数的影响

    A1、A2、A3分别表示林分密度为700~1 000株/hm2、1 000~1 200株/hm2、>1 200株/hm2;B1、B2、B3分别表示灌草盖度为 < 30%、30%~70%、>70%;C1和C2分别表示树干形态全部通直、弯曲与通直并存。不同小写字母表示差异显著(P < 0.05)。下同。

    Figure  2.  Influences of stand density, shrub-herb coverage and trunk shape on landscape patch index

    A1, A2, A3 mean 700-1 000 plant/ha, 1 000-1 200 plant/ha, >1 200 plant/ha stand density, respectively; B1, B2, B3 mean < 30%, 30%-70%, >70% shrub coverage, respectively; C1, C2 mean the shape of the trunk is straight or both bend and straight, respectively. Different lowercase letters indicate significant difference at P < 0.05 level. The same below.

    图  3  林分密度与灌草盖度对景观斑块指数的交互影响

    Figure  3.  Interactive influences of stand density and shrub-herb coverage on landscape patch index

    图  4  林分密度、灌草盖度与树干形态对景观斑块指数的交互影响

    Figure  4.  Interactive influences of stand density, shrub-herb coverage and trunk shape on landscape patch index

    图  5  林分密度、灌草盖度和树干形态对SPI的交互作用

    Figure  5.  Interactive influences of stand density, shrub-herb coverage and trunk shape on SPI

    表  1  人工油松风景林样地概况

    Table  1.   Main information of sampled plots of planted Pinus tabuliformis forest

    密度级
    Stand density grade
    密度范围/(株·hm-2)
    Stand density range/(tree·ha-1)
    样地数量
    Sample plot number
    平均胸径
    Average DBH/cm
    平均冠幅
    Average crown width/m
    平均树高
    Average tree height/m
    灌草盖度
    Shrub and herb coverage/%
    透视距离
    Perspective distance/m
    450~800 13 16.1±0.4 5.5 8.6±0.24 70~90 25~30
    800~1 100 17 14.1±0.2 4.7 7.9±0.2 0~70 15~20
    1 100~1 380 10 12.6±0.2 4.1 8.2±0.7 70~90 5~7
    下载: 导出CSV

    表  2  不同处理间景观斑块指数方差分析

    Table  2.   Variance analysis of landscape patch index among different treatments

    变异来源
    Origin of variance
    LSI SIEI SPI AI
    F P F P F P F P
    A 1.036 0.433 4.200 0.104 12.748 0.018 2.733 0.178
    B 3.228 0.045 2.425 0.130 0.191 0.828 8.391 0.005
    C 12.475 0.012 29.832 0.001 0.909 0.377 1.312 0.295
    A×B 5.879 0.007 3.806 0.031 5.475 0.009 2.675 0.083
    A×C 6.110 0.035 9.299 0.014 4.386 0.067 3.847 0.084
    B×C 1.611 0.239 6.175 0.014 3.380 0.068 0.357 0.706
    A×B×C 2.296 0.118 2.312 0.117 3.449 0.042 2.568 0.092
    注:A代表林分密度,B代表灌草盖度,C代表树干形态。Notes: A stands for stand density, B stands for shrub-herb coverage, and C stands for trunk shape.
    下载: 导出CSV
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  • 收稿日期:  2018-03-05
  • 修回日期:  2018-03-22
  • 刊出日期:  2018-10-01

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