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天然沸石对松嫩平原黑钙土理化性质和保水能力的影响

马媛媛 戴显庆 彭绍好 杨光 冀晓东

马媛媛, 戴显庆, 彭绍好, 杨光, 冀晓东. 天然沸石对松嫩平原黑钙土理化性质和保水能力的影响[J]. 北京林业大学学报, 2018, 40(2): 51-57. doi: 10.13332/j.1000-1522.20170218
引用本文: 马媛媛, 戴显庆, 彭绍好, 杨光, 冀晓东. 天然沸石对松嫩平原黑钙土理化性质和保水能力的影响[J]. 北京林业大学学报, 2018, 40(2): 51-57. doi: 10.13332/j.1000-1522.20170218
Ma Yuan-yuan, Dai Xian-qing, Peng Shao-hao, Yang Guang, Ji Xiao-dong. Effects of natural zeolite on physical and chemical properties and water retention capacity of chernozem in Songnen Plain of northeastern China[J]. Journal of Beijing Forestry University, 2018, 40(2): 51-57. doi: 10.13332/j.1000-1522.20170218
Citation: Ma Yuan-yuan, Dai Xian-qing, Peng Shao-hao, Yang Guang, Ji Xiao-dong. Effects of natural zeolite on physical and chemical properties and water retention capacity of chernozem in Songnen Plain of northeastern China[J]. Journal of Beijing Forestry University, 2018, 40(2): 51-57. doi: 10.13332/j.1000-1522.20170218

天然沸石对松嫩平原黑钙土理化性质和保水能力的影响

doi: 10.13332/j.1000-1522.20170218
基金项目: 

中央高校基本科研业务费专项 2015ZCQ-SB-01

中央高校基本科研业务费专项 2016JX04

详细信息
    作者简介:

    马媛媛。主要研究方向:生态恢复与土壤修复。Email: mayuanyuan@bjfu.edu.cn 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:

    冀晓东,教授。主要研究方向:生态恢复与土壤修复。Email: jixiaodong@bjfu.edu.cn 地址:同上

  • 中图分类号: S152.5; S152.7

Effects of natural zeolite on physical and chemical properties and water retention capacity of chernozem in Songnen Plain of northeastern China

  • 摘要: 目的通过研究天然沸石掺配量对于松嫩平原黑钙土理化性质和土壤水分特征曲线的影响,来研究天然沸石改良黑钙土的保水能力的效果,为改良土壤保水性提供理论参考。方法采用天然沸石改良土壤,进行60 d花盆培养,环刀法测量土壤密度,公式法计算土壤总孔隙度、毛管孔隙度、通气孔隙度。离心机法测定土壤水分特征曲线。结果天然沸石改良黑钙土试验中,土壤密度随沸石掺配量的增加而增大,呈正相关关系,当沸石掺配量为10%时,土壤密度增加最为显著;毛管孔隙度和总孔隙度均随掺配量的增加而减小,呈负相关关系,当沸石掺配量为10%时,土壤的通气孔隙度为最大。各掺配量下土壤的持水能力结果为:20%天然沸石(NZ)>15%NZ≈10%NZ>5%NZ>CK。各组土壤的水分特征曲线均能用Gardner模型拟合。Gardner模型方程的拟合系数ab均随持水能力增强而减小,呈负相关关系;随饱和含水率升高而增大,呈正相关关系。将饱和含水率和拟合系数a进行拟合,结果显示决定系数(R2)为0.941 8。结论在进行土壤持水能力改良时,利用10%天然沸石掺配量比较经济可行。土壤饱和含水率高,不一定水分特征曲线初始水平就高。各项试验结果说明,利用天然沸石可以有效改良砂壤黑钙土的保水能力,为黑土区土壤改良提供试验和理论参考。

     

  • 图  1  天然沸石的X射线衍射图谱

    Figure  1.  XRD patterns of natural zeolite

    图  2  天然沸石SEM图

    Figure  2.  SEM images of natural zeolite

    图  3  不同沸石掺配量下土壤密度

    Figure  3.  Soil bulk density under different zeolite amount

    图  4  不同沸石掺配量下土壤孔隙度

    Figure  4.  Soil porosity under different zeolite amount

    图  5  不同沸石掺配量下的土壤水分特征曲线

    Figure  5.  Soil water characteristic curves under different zeolite amount

    图  6  不同沸石掺配量下土壤水分特征Gardner模型拟合曲线

    Figure  6.  Gardner model fitting curves of soil water characteristics under different zeolite amount

    表  1  天然沸石主要成分

    Table  1.   Main composition of natural zeolite

    %
    成分 Composition SiO2 Al2O3 Fe2O3 K2O CaO TiO2 MgO MnO P2O5 BaO Na2O
    天然沸石 Natural zeolite 60.24 22.17 11.40 2.32 1.43 1.17 0.56 0.24 0.11 0.08 0.08
    下载: 导出CSV

    表  2  黑钙土理化性质

    Table  2.   Physical and chemical properties of chernozem

    各粒径团聚体含量 Percentage of aggregate size/% 有机质
    Organic matter/
    (g·kg-1)
    全氮
    Total nitrogen/
    (g·kg-1)
    速效磷
    Available P/
    (mg·kg-1)
    速效钾
    Available K/
    (mg·kg-1)
    pH
    >5mm 2~5mm 1~2mm 0.5~
    1mm
    0.25~
    0.5mm
    <0.25mm
    17.81 18.82 16.35 15.31 17.99 13.72 68.03 0.80 49.27 56.30 5.12
    下载: 导出CSV

    表  3  不同沸石掺配量下土壤孔隙度

    Table  3.   Soil porosity under different zeolite amount

    沸石掺配量
    Zeolite amount/%
    土壤密度
    Soil bulk density/(g·cm-3)
    总孔隙度
    Total porosity(Pt)/%
    毛管孔隙度
    Capillary porosity(Pc)/%
    通气孔隙度
    Aeration porosity(Pa)/%
    0 1.03 60.28 57.77 2.51
    5 1.10 57.64 54.70 2.94
    10 1.17 55.36 51.34 4.02
    15 1.20 54.41 50.73 3.68
    20 1.24 53.03 49.18 3.85
    下载: 导出CSV

    表  4  土壤水分特征曲线拟合方程

    Table  4.   Fitting equations of soil water characteristic curves

    沸石掺配量
    Zeolite amount/%
    拟合方程
    Fitting equation
    a b R2 饱和含水率
    Saturated moisture content/%
    0 θ=90.09S-0.14 90.09 0.14 0.9893 56.74
    5 θ=86.39S-0.13 86.39 0.13 0.9927 54.70
    10 θ=76.75S-0.11 76.75 0.11 0.9986 51.34
    15 θ=75.08S-0.10 75.08 0.10 0.9986 50.73
    20 θ=70.17S-0.09 70.17 0.09 0.9846 49.18
    注:θ为土壤体积含水率; S为土壤水势; ab为拟合参数。Notes: θ means soil volumetric moisture content; S means soil water potential; a, b mean fitting parameters.
    下载: 导出CSV
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  • 收稿日期:  2017-06-16
  • 修回日期:  2017-08-08
  • 刊出日期:  2018-02-01

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