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2种扦插护岸植物根系对土壤结构的改良效应

孙一惠 马岚 张栋 夏晓平 薛孟君 苗新云

孙一惠, 马岚, 张栋, 夏晓平, 薛孟君, 苗新云. 2种扦插护岸植物根系对土壤结构的改良效应[J]. 北京林业大学学报, 2017, 39(7): 54-61. doi: 10.13332/j.1000-1522.20170076
引用本文: 孙一惠, 马岚, 张栋, 夏晓平, 薛孟君, 苗新云. 2种扦插护岸植物根系对土壤结构的改良效应[J]. 北京林业大学学报, 2017, 39(7): 54-61. doi: 10.13332/j.1000-1522.20170076
SUN Yi-hui, MA Lan, ZHANG Dong, XIA Xiao-ping, XUE Meng-jun, MIAO Xin-yun. Root distribution characteristics of two cuttage plants on bank slope and its effects on soil aggregates[J]. Journal of Beijing Forestry University, 2017, 39(7): 54-61. doi: 10.13332/j.1000-1522.20170076
Citation: SUN Yi-hui, MA Lan, ZHANG Dong, XIA Xiao-ping, XUE Meng-jun, MIAO Xin-yun. Root distribution characteristics of two cuttage plants on bank slope and its effects on soil aggregates[J]. Journal of Beijing Forestry University, 2017, 39(7): 54-61. doi: 10.13332/j.1000-1522.20170076

2种扦插护岸植物根系对土壤结构的改良效应

doi: 10.13332/j.1000-1522.20170076
基金项目: 

北京市科技计划课题 Z151100001115001

西宁防洪及流域管理利用世行贷款项目 XN-C-2012-04

国家自然科学基金项目 41501297

详细信息
    作者简介:

    孙一惠。主要研究方向:土壤侵蚀与流域治理。Email:syh2222222@163.com  地址:100083  北京市海淀区清华东路35号北京林业大学水土保持学院

    责任作者:

    马岚,副教授。主要研究方向:土壤侵蚀与生态水文。Email:mlpcz@sina.com  地址:同上

  • 中图分类号: S157.9

Root distribution characteristics of two cuttage plants on bank slope and its effects on soil aggregates

  • 摘要: 以坡面5年生金丝柳和毛白杨为研究对象,采用土柱法测定2种扦插植物的根系分布特征,并应用Le Bissonnais法中快速湿润处理测定2种扦插植物不同土层土壤水稳性团聚体稳定性和可蚀性特征,测定指标包括:>0.25 mm土壤水稳性团聚体含量(R0.25)、土壤团聚体平均质量直径(MWD)和土壤可蚀性因子K值。分析坡面2种扦插植物根系分布特征及其对土壤团聚体的影响,结果表明:1)扦插植物根系集中分布在树干周围0~40 cm土层内,以>5 mm的粗根为主;2)在0~100 cm土层,根系含量、土壤团聚体稳定性和抗侵蚀能力均随土层深度的增大而减小;3)金丝柳根系在提高土壤团聚体稳定性和抗侵蚀能力方面强于毛白杨;4)扦插植物R0.25与<1 mm根系含量均呈现显著正相关关系,说明根系改善土壤团粒结构的性能主要取决于<1 mm根系含量。

     

  • 图  1  土壤取样点分布

    Figure  1.  Distribution of soil sampling points

    图  2  2种扦插植物不同土层不同径级根质量分布图

    Figure  2.  Root mass distribution at different soil depths and diameters for two cuttage plants

    图  3  2种扦插植物细根(直径<1 mm)根质量分布等值线图

    Figure  3.  Root mass distribution isoline map of fine root (with diameter less than 1 mm) for two cuttage plants

    图  4  2种扦插植物不同土层土壤水稳性团聚体粒级分布

    Figure  4.  Size distribution of water-stable aggregates in soil at different depths of two cuttage plants

    图  5  2种扦插植物不同土层土壤团聚体稳定性指标值

    不同大写字母表示同一植物不同土层间差异显著,不同小写字母表示同一土层不同植物间差异显著(单因素方差分析,P<0.05)。

    Figure  5.  Soil aggregate stability index values at different soil depths for two cuttage plants

    Different capital letters indicate significant differences among soil layers in the same plant, and different small letters indicate significant differences among plants in the same soil layer(one-way-ANOVA, P < 0.05).

    表  1  2种扦插植物基本情况

    Table  1.   Basic conditions of two cuttage plants

    树种Tree species树龄/a
    Tree age/year
    冠幅
    Crown width/m
    株高
    Tree height/m
    胸径
    DBH/cm
    金丝柳Salix alba var. tristis51.354.325.73
    毛白杨Populus tomentosa51.256.515.41
    注:冠幅为(长+宽)/2。Note:crown width is (length + width)/2.
    下载: 导出CSV

    表  2  2种扦插植物根质量水平分布及其所占比例

    Table  2.   Root mass horizontal distribution and its proportion for two cuttage plants

    树种Tree species项目Item从坡底到坡顶的距离Distance from slope bottom to top
    0~20cm20~40cm40~60cm60~80cm80~100cm100~120cm
    金丝柳Salix alba var. tristis根质量Root mass/g8.6311.58125.55183.17214.53344.62
    占总根质量百分比
    Percentage in total root mass/%
    0.610.818.8212.8715.0724.22
    毛白杨Populus tomentosa根质量Root mass/g0.005.872.638.4568.15956.72
    占总根质量百分比
    Percentage in total root mass/%
    0.000.480.220.695.5978.45
    120~140cm140~160cm160~180cm180~200cm200~220cm
    金丝柳Salix alba var. tristis根质量Root mass/g179.92164.7098.7285.646.03
    占总根质量百分比
    Percentage in total root mass/%
    12.6411.576.946.020.42
    毛白杨Populus tomentosa根质量Root mass/g121.8740.1510.351.972.95
    占总根质量百分比
    Percentage in total root mass/%
    9.993.320.850.160.24
    下载: 导出CSV

    表  3  2种扦插植物根质量垂直分布及其所占比例

    Table  3.   Root mass vertical distribution and its proportion for two cuttage plants

    树种Tree species项目Item土层深度Soil depth
    0~20cm20~40cm40~60cm60~80cm80~100cm100~120cm120~140cm
    金丝柳Salix alba var. tristis1 423.09根质量Root mass/g808.09420.12158.7024.6811.500.000.00
    占总根质量百分比
    Percentage in total root mass/%
    56.7829.5211.151.730.810.000.00
    毛白杨Populus tomentosa1 219.47根质量Root mass/g599.30290.26139.4785.4675.0222.717.25
    占总根质量百分比
    Percentage in total root mass/%
    49.1423.8011.447.016.151.860.59
    下载: 导出CSV

    表  4  2种扦插植物不同径级根质量分布及其所占比例

    Table  4.   Root mass distribution and its proportion of different diameters for two cuttage plants

    树种Tree species项目Item根系直径Root diameter
    <1 mm1~3 mm3~5 mm>5 mm
    金丝柳Salix alba var. tristis根质量Root mass/g145.7193.2670.761 113.36
    占总根质量百分比Percentage in total root mass/%10.246.554.9778.24
    毛白杨Populus tomentosa根质量Root mass/g81.9954.9963.791 018.70
    占总根质量百分比Percentage in total root mass/%6.724.515.2383.54
    下载: 导出CSV

    表  5  2种扦插植物各径级根系质量与土壤团聚体稳定性指标的相关关系

    Table  5.   Correlations between root mass of each diameter and soil aggregate stability index for two cuttage plants

    树种
    Tree species
    团聚体稳定性指标
    Aggregate stability index
    不同径级根系质量Root mass of different diameters/g样本数
    Sample number
    <1 mm1~3 mm3~5 mm>5 mm
    金丝柳Salix alba var. tristisR0.250.74**0.40-0.250.65n=21
    MWD0.08-0.490.050.23
    K-0.43*0.430.12-0.31
    毛白杨Populus tomentosaR0.250.79**0.590.530.53n=18
    MWD0.55*0.62*0.410.45
    K-0.61**-0.58-0.75*-0.82**
    注:由于少量土壤样品部分径级根系不存在,故金丝柳样本数小于等于21,毛白杨样本数小于等于18,***分别表示在P<0.05和P<0.01水平上相关显著。Notes:due to the absence of partial diameter roots in a small amount of soil samples, the number of Salix alba var. tristis is less than or equal to 21, and the number of Populus tomentosa is less than or equal to 18, * and ** indicate significant correlation at P<0.05 and P<0.01 levels, respectively.
    下载: 导出CSV
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  • 收稿日期:  2017-03-14
  • 修回日期:  2017-03-30
  • 刊出日期:  2017-07-01

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