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北京山区不同林分林下植被根系分布特征及其影响因素

张晓 黄晓强 信忠保 孔庆仙 夏晓平 蒋秋玲

张晓, 黄晓强, 信忠保, 孔庆仙, 夏晓平, 蒋秋玲. 北京山区不同林分林下植被根系分布特征及其影响因素[J]. 北京林业大学学报, 2018, 40(4): 51-57. doi: 10.13332/j.1000-1522.20170399
引用本文: 张晓, 黄晓强, 信忠保, 孔庆仙, 夏晓平, 蒋秋玲. 北京山区不同林分林下植被根系分布特征及其影响因素[J]. 北京林业大学学报, 2018, 40(4): 51-57. doi: 10.13332/j.1000-1522.20170399
Zhang Xiao, Huang Xiaoqiang, Xin Zhongbao, Kong Qingxian, Xia Xiaoping, Jiang Qiuling. Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(4): 51-57. doi: 10.13332/j.1000-1522.20170399
Citation: Zhang Xiao, Huang Xiaoqiang, Xin Zhongbao, Kong Qingxian, Xia Xiaoping, Jiang Qiuling. Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(4): 51-57. doi: 10.13332/j.1000-1522.20170399

北京山区不同林分林下植被根系分布特征及其影响因素

doi: 10.13332/j.1000-1522.20170399
基金项目: 

林果业生态环境功能提升协同创新中心 PXM2018_014207_000024

国家科技支撑计划子课题 2015BAD07B030201

中央高校基本科研业务费专项 2017ZY02

详细信息
    作者简介:

    张晓。主要研究方向:土壤侵蚀与水土保持。Email:zhangxiao3e@bjfu.edu.cn 地址:100083北京市海淀区北京林业大学水土保持学院

    责任作者:

    信忠保,博士,副教授。主要研究方向:生态恢复与治理。Email:xinzhongbao@126.com 地址:同上

  • 中图分类号: S791.254; S791.38

Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing

  • 摘要: 目的通过野外调查和室内试验分析林下植被生物量以及根系特征,为北京土石山区人工造林树种的选择和植被恢复提供科学依据。方法在北京土石山区典型代表红门川流域,以油松和侧柏林下植被为研究对象,采用样方法进行植被调查,测定林下植被生物量和根系,草本和灌木生物量采用全刈法,根系调查采用连续钻取土芯法。结果结果表明:不同树种林地根系生物量差异显著(P < 0.05),灌丛林地根系生物量最高((6.84±1.35) t/hm2),其次为侧柏((4.65±0.90) t/hm2),油松林地土壤根系生物量最低((3.33±0.93) t/hm2),且同一林地根系生物量在不同土层均基本接近;不同树种林地根长密度和根表面积密度均随径级的增大而减小,0~0.1 mm径级根系是林地根系分布最广的,其次为0.1~0.2 mm径级的根系;随林龄增大,侧柏、油松林不同径级根长密度、根表面积密度和根系生物量均呈递减趋势,且均明显低于灌丛林地;坡向显著影响林地根系生物量,半阴坡根系生物量明显大于阳坡和阴坡根系生物量(P < 0.05),林地根长密度和根表面积密度与砂粒含量显著性负相关(P < 0.05),其中径级0~0.1 mm和0.2~0.5 mm根系尤为明显,根系生物量与土壤密度间显著负相关(P < 0.05),尤其是径级0.2~0.5 mm根系。结论研究结果表明对土石山区造林树种的选取不仅要参考当地环境条件和土壤特征,还要充分考虑造林树种的生长特性。

     

  • 图  1  3种森林类型不同径级根表面积

    a、b分别表示0~10 cm和10~20 cm土层3种森林类型不同径级根表面积。

    Figure  1.  Root surface area density of different diameter classes in three forest types

    a and b show the root surface area of three forest types with different diameters in 0-10 cm and 10-20 cm soil layers.

    图  2  3种森林类型根系生物量

    Figure  2.  Root biomass in three forest types

    表  1  3种林地根系生物量、根表面积和根长密度指标

    Table  1.   Root biomass, root length density and root surface area density in three forest types

    树种
    Species
    土层
    Soil layer/cm
    生物量/(t·hm-2)
    Biomass/(t·ha-1)
    表面积密度
    Superficial area density/(cm2·cm-3)
    根长密度
    Root length density/(cm·cm-3)
    均值
    Average
    标准差
    Standard deviation
    变异系数
    Variable coefficient/%
    均值
    Average
    标准差
    Standard deviation
    变异系数
    Variable coefficient/%
    均值
    Average
    标准差
    Standard deviation
    变异系数
    Variable coefficient/%
    灌丛Shrub 0~10 3.43Aa 0.64 18.75 0.46Aa 0.11 24.52 1.03Aa 0.10 9.74
    10~20 3.41Aa 0.70 20.54 0.42Aa 0.15 34.92 1.02Aa 0.17 16.58
    0~20 6.84 1.35 19.75 0.88 0.23 25.97 2.05 0.27 13.17
    侧柏Platycladus orientalis 0~10 2.57Ab 0.31 11.88 0.31Ab 0.13 40.82 0.73Aa 0.15 20.26
    10~20 2.08Ab 0.61 29.52 0.26Ab 0.10 39.80 0.66Aa 0.13 19.84
    0~20 4.65 0.90 19.35 0.57 0.23 40.35 1.39 0.28 19.89
    油松Pinus tabuliformis 0~10 1.81Ac 0.57 31.56 0.27Ab 0.09 34.24 0.73Aa 0.11 14.71
    10~20 1.52Ac 0.37 24.48 0.25Ab 0.05 19.09 0.65Aa 0.14 21.15
    0~20 3.33 0.93 27.97 0.52 0.14 29.79 1.38 0.25 17.73
    注:不同小写字母表示同土层不同树种根系生物量、表面积和根长密度差异显著(P < 0.05);不同大写字母表示同树种不同土层根系生物量、表面积和根长密度差异显著(P < 0.05)。Notes: different lowercase letters indicate significant differences in root biomass, surface area and root length density of different tree species (P < 0.05); different capital letters indicate significant differences in root biomass, surface area and root length density of different tree species(P < 0.05).
    下载: 导出CSV

    表  2  3种森林类型不同径级根长密度

    Table  2.   Root length density of different diameter classes in three forest types

    树种
    Species
    林龄/a
    Age of stand/year
    土层
    Soil layer/cm
    根长密度
    Root length density/(cm·cm-3)
    0.0~0.1 mm 0.1~0.2 mm 0.2~0.5 mm 0.5~2 mm ≤2 mm
    侧柏Platycladus orientalis 20 0~10 0.659±0.102 0.114±0.018 0.104±0.022 0.055±0.014 0.932±0.140
    10~20 0.589±0.126 0.117±0.015 0.087±0.010 0.041±0.017 0.835±0.166
    40 0~10 0.545±0.154 0.110±0.027 0.093±0.019 0.044±0.008 0.791±0.208
    10~20 0.497±0.113 0.106±0.006 0.081±0.012 0.058±0.013 0.742±0.140
    57 0~10 0.432±0.090 0.103±0.020 0.075±0.019 0.024±0.009 0.635±0.127
    10~20 0.377±0.103 0.079±0.016 0.056±0.016 0.018±0.009 0.530±0.133
    100 0~10 0.399±0.104 0.096±0.023 0.061±0.016 0.011±0.004 0.548±0.131
    10~20 0.380±0.115 0.083±0.016 0.049±0.015 0.008±0.002 0.539±0.135
    油松Pinus tabuliformis 35 0~10 0.563±0.135 0.124±0.019 0.107±0.024 0.052±0.021 0.846±0.195
    10~20 0.536±0.093 0.120±0.020 0.095±0.015 0.065±0.018 0.816±0.128
    40 0~10 0.512±0.170 0.113±0.029 0.091±0.028 0.038±0.019 0.755±0.239
    10~20 0.448±0.142 0.104±0.025 0.083±0.023 0.033±0.015 0.668±0.195
    57 0~10 0.394±0.108 0.088±0.028 0.071±0.030 0.034±0.029 0.587±0.182
    10~20 0.354±0.129 0.067±0.022 0.045±0.018 0.012±0.007 0.478±0.158
    灌丛Shrub 0~10 0.710±0.074 0.128±0.012 0.114±0.012 0.075±0.015 1.027±0.100
    10~20 0.684±0.122 0.131±0.015 0.121±0.013 0.083±0.02 1.019±0.169
    下载: 导出CSV

    表  3  根系生物量、根长密度和根表面积指标与其影响因子的相关系数

    Table  3.   Correlation analysis with environmental elements of root biomass, root length density and root superficial area density

    根系分布特征指标
    Root distribution characteristics index
    灌木生物量
    Shrub biomass
    草本生物量
    Grass biomass
    郁闭度
    Canopy density
    坡度
    Gradient
    黏粒
    Clay
    粉粒
    Slit
    砂粒
    Sand
    土壤密度
    Bulk density
    总根生物量Total root biomass 0.302** 0.338** -0.486** 0.010 0.010 -0.010 0.011 -0.300**
    总根长密度Total root length density 0.358** 0.381** -0.358** 0.226* 0.287* 0.200 -0.300** 0.140
    0.0~0.1 mm径级根长密度Root length density of 0.0-0.1 mm diameter root 0.327** 0.314** -0.349** 0.210 0.290* 0.200 -0.298** 0.100
    0.1~0.2 mm径级根长密度Root length density of 0.1-0.2 mm diameter root 0.250* 0.244* -0.372** 0.190 0.180 0.090 -0.210 0.140
    0.2~0.5 mm径级根长密度Root length density of 0.2-0.5 mm diameter root 0.242* 0.235* -0.334** 0.228* 0.220 0.150 -0.243* 0.229*
    0.5~2.0 mm径级根长密度Root length density of 0.5-2.0 mm diameter root 0.161 0.132 -0.200 0.180 0.236* 0.200 -0.236* 0.170
    总根表面积密度Total root superficial area density 0.362** 0.349** -0.416** 0.257* 0.281* 0.170 -0.238* 0.120
    0.0~0.1 mm径级根表面积密度Root superficial area density of 0.0-0.1 mm diameter root 0.310** 0.326** -0.357** 0.225* 0.279* 0.190 -0.295** 0.130
    0.1~0.2 mm径级根表面积密度Root superficial area density of 0.1-0.2 mm diameter root 0.254* 0.240* -0.370** 0.190 0.180 0.090 -0.210 0.140
    0.2~0.5 mm径级根表面积密度Root superficial area density of 0.2-0.5 mm diameter root 0.280* 0.273* -0.347** 0.229* 0.235* 0.160 -0.251* 0.233*
    0.5~2.0 mm径级根表面积密度Root superficial area density of 0.5-2.0 mm diameter root 0.120 0.110 -0.206 0.210 0.120 0.140 -0.160 0.040
    注:**表示极显著性水平0.01,*表示显著性水平0.05,样本数为117个。Notes: ** refers to the significance level of 0.01, * refers to the significance level of 0.05, with a sample size of 117.
    下载: 导出CSV

    表  4  不同坡向森林根系生物量、根长密度和根表面积指标

    Table  4.   Root biomass, root length density and root surface area density in different slope aspect

    坡位
    Slope position
    0~10 cm土层根生物量/(t·hm-2)
    Root biomassof 0-10 cm soil layer/(t·ha-1)
    10~20 cm土层根生物量/(t·hm-2)
    Root biomassof 10-20 cm soil layer/(t·ha-1)
    0~10 cm土层根长密度
    Root length density of 0-10 cm soil layer/(cm·cm-3)
    10~20 cm土层根长密度
    Root length density of 10-20 cm soil layer/(cm·cm-3)
    0~10 cm土层根表面积密度
    Root surface area density of 0-10 cm soil layer/(cm2·cm-3)
    10~20 cm土层根表面积密度
    Root surface area density of 10-20 cm soil layer/(cm2·cm-3)
    阴坡Shady slope 1.879±1.326C 1.809±1.216C 0.688±0.388 0.783±0.481 0.258±0.162 0.311±0.221
    半阴坡Half-shady slope 2.556±1.426A 2.958±1.658A 0.684±0.302 0.696±0.396 0.306±0.192 0.31±0.242
    半阳坡Half-sunny slope 2.521±0.93AB 2.854±1.846AB 0.698±0.131 0.671±0.194 0.22±0.078 0.212±0.075
    阳坡Sunny slope 2.202±1.135BC 1.839±1.093BC 0.596±0.396 0.62±0.397 0.237±0.184 0.218±0.18
    注:不同大写字母表示差异显著性水平0.01。Note: varied capital letters indicate significant difference at P < 0.01 level.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-11-07
  • 修回日期:  2017-12-21
  • 刊出日期:  2018-04-01

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