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间作对红壤磷素吸附解吸平衡效应的影响

周龙 苏丽珍 王思睿 王瑞雪 普正仙 郑毅 汤利

周龙, 苏丽珍, 王思睿, 王瑞雪, 普正仙, 郑毅, 汤利. 间作对红壤磷素吸附解吸平衡效应的影响[J]. 中国生态农业学报(中英文), 2021, 0(0): 1−12 doi: 10.13930/j.cnki.cjea.210312
引用本文: 周龙, 苏丽珍, 王思睿, 王瑞雪, 普正仙, 郑毅, 汤利. 间作对红壤磷素吸附解吸平衡效应的影响[J]. 中国生态农业学报(中英文), 2021, 0(0): 1−12 doi: 10.13930/j.cnki.cjea.210312
ZHOU L, SU L Z, WANG S R, WANG R X, PU Z X, ZHEN Y, TANG L. Effect of intercropping on balancing effect of absorption and desorption characteristics of phosphorus in red soil[J]. Chinese Journal of Eco-Agriculture, 2021, 0(0): 1−12 doi: 10.13930/j.cnki.cjea.210312
Citation: ZHOU L, SU L Z, WANG S R, WANG R X, PU Z X, ZHEN Y, TANG L. Effect of intercropping on balancing effect of absorption and desorption characteristics of phosphorus in red soil[J]. Chinese Journal of Eco-Agriculture, 2021, 0(0): 1−12 doi: 10.13930/j.cnki.cjea.210312

间作对红壤磷素吸附解吸平衡效应的影响

doi: 10.13930/j.cnki.cjea.210312
基金项目: 国家自然科学基金项目(31760615)、国家重点研发计划项目(2017YFD0200207)和云南省科技人才与平台计划(2019IC026)资助
详细信息
    作者简介:

    周龙, 主要从事施肥与作物养分吸收利用研究。E-mail: 287834727@qq.com

    通讯作者:

    汤利, 主要研究方向为养分资源高效利用。E-mail: ltang@ynau.edu.cn

  • 中图分类号: S312

Effect of intercropping on balancing effect of absorption and desorption characteristics of phosphorus in red soil

Funds: This study was supported by the National Natural Science Foundation of China (31760615), the National Key Research & Development Program of China (2017YFD0200207), and the Scientific and Technological Talents and Platform of Yunnan Province (2019IC026)
More Information
  • 摘要: 磷素的吸附和解吸特性对土壤磷素迁移及其环境效应具有重要影响, 过量磷肥施入易造成土壤磷素固定和流失, 但合理间作可促进磷素吸收利用, 减少固定, 研究间作和不同施磷量条件下红壤磷素吸附解吸特性的平衡效应对促进红壤磷的高效利用, 兼顾环境效应具有重要意义。本研究采取2因素裂区区组试验, 主因素为种植模式, 分别为与玉米||大豆(IM)、单作玉米(MM); 副因素为施磷水平, 分别为P0 [0 kg(P2O5)∙hm−2]、P60 [60 kg(P2O5)∙hm−2]、P90 [90 kg(P2O5)∙hm−2]、P120 [120 kg(P2O5)∙hm−2] 4个施磷水平, 通过田间试验, 研究间作和施磷量对红壤磷素吸附解吸平衡效应的影响; 应用结构方程模型(SEM)和邻接树法(ABT)定量分析间作和施磷水平对磷吸附和解吸的相对贡献, 揭示间作影响红壤磷素吸附解吸的关键因子。结果表明: 1) Langmuir 等温吸附方程最适合红壤对磷的吸附特征拟合, 土壤磷吸附量随平衡溶液磷浓度的增加呈先增加再趋于饱和的趋势, 土壤磷吸附量随施磷量的增加逐渐降低。2)种植模式和施磷水平以及交互作用极显著(P<0.01)影响红壤磷素的吸附量和解吸量。间作处理较单作磷素吸附量和解吸量分别增加22.9%和9.2%(P<0.05); 不同施磷水平下, 间作磷吸附量较单作显著增加13.0%、19.4%、41.5%和23.9% (P<0.05); 磷解吸量在P0和P60处理间作较单作显著增加90.2%和194.4% (P<0.05), 而在P90和P120处理间作较单作减少52.1%和34.1% (P<0.05)。3)不同种植模式与施磷水平下, 土壤磷吸附量与土壤pH、有机质、树脂磷、有效磷、全磷以及磷吸附饱和度呈极显著负相关(P<0.01), 与游离氧化铁、游离氧化铝和磷吸持指数呈极显著正相关(P<0.01), 土壤磷解吸量与标准需磷量呈极显著负相关(P<0.01)。红壤磷素的吸附和解吸主要受pH、有机质和游离氧化铁的影响, 间作通过改变土壤的pH、有机质和游离氧化铁含量影响红壤磷吸附量和解吸量。玉米||大豆间作具有较好的土壤磷缓冲能力, 低磷水平下促进磷素大量解吸供植物吸收利用, 高磷水平下促进磷素吸附有效减缓磷素的损失。
  • 图  1  玉米||大豆间作(IM)和玉米单作(MM)田间设计示意图

    Figure  1.  Field design diagrams of maize-soybean intercropping (IM) and maize monoculture (MM) systems

    图  2  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷等温吸附曲线

    Figure  2.  Adsorption isotherms of phosphorus in soil of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphorus levels

    图  3  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷等温解吸曲线

    Figure  3.  Isothermal desorption curves of phosphorus in soil of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphours levels

    图  4  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷解吸率变化特征

    Figure  4.  Characteristics of desorption rates of soil phosphorus of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphours levels

    图  5  结构模型方程分析不同施磷水平下玉米||大豆间作和玉米单作土壤性质与磷吸附和解吸附的因果关系

    细实线、粗实线和虚线箭头表示显著(P<0.05)、极显著(P<0.01)和不显著(P>0.05)路径, χ2 =57.70, Df.=17, P<0.01。The thin lines, thick lines, and dotted arrows indicate significant (P<0.05), very significant (P<0.01), and no significant (P>0.05) path. χ2 =57.70, Df.=17, P<0.01.

    Figure  5.  Structural equation model analysis of causal relationships among soil properties and phosphorus (P) adsorption, desorption of maize-soybean intercropping and maize monoculture systems under different phosphours levels

    图  6  基于邻接树法分析玉米||大豆间作(IM)和玉米单作(MM)土壤因子对磷吸附(Absroption)和解吸(Desorption)的相对作用

    OM为有机质, Fe2O3为游离氧化铁, Resin-P为树脂磷, TP为全磷, Ava-P为速效磷, Al2O3为游离氧化铝。OM is organic matter, Fe2O3 is free Fe2O3, TP is total phosphorus, Ava-P is available phosphorus, Al2O3 is free Al2O3.

    Figure  6.  Aggregated boosted tree (ABT) analysis for relative importance of soil chemical properties for phoshporus absorption and desorption of maize-soybean intercropping (IM) and maize monoculture (MM) systems

    表  1  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷等温吸附方程

    Table  1.   Equations of adsorption isotherms of phosphorus (P) in soil of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphours levels

    处理
    Treatment
    Langmuir 方程 Langmuir equationFreundlich 方程 Freundlich equationTemkin 方程 Temkin equation
    C/Q=C/Qm+1/K1×QmR2Q=K2×C1/nR2K21/nQ=a+K3lnCR2a
    P0IMC/Q=0.001 30C+0.025 290.990**Q=233.560C0.2390.932*233.560.239Q=227.585+92.4259lnC0.948*227.585
    MMC/Q=0.001 60C+0.004 2950.990**Q=73.682C0.5110.993**73.6820.511Q=−58.744+151.8457lnC0.971**−58.744
    P60IMC/Q=0.001 60C+0.022 520.940*Q=146.870C0.2990.981**146.870.299Q=132.150+85.2624lnC0.966**132.150
    MMC/Q=0.001 85C+0.010 810.980**Q=54.640C0.5110.945*54.640.511Q=−102.068+130.4687lnC0.935*−102.068
    P90IMC/Q=0.001 66C+0.023 420.990**Q=91.126C0.4130.963**91.1260.413Q=4.501+116.5802lnC0.988**4.501
    MMC/Q=0.001 70C+0.022 940.990**Q=31.421C0.6000.986**31.4210.600Q=−48.210+97.3087lnC0.883*−48.210
    P120IMC/Q=0.001 73C+0.053 170.990**Q=81.520C0.4210.952**81.520.421Q=−33.856+119.6437lnC0.970**−33.856
    MMC/Q=0.001 67C+0.029 910.960**Q=48.804C0.4970.962**48.8040.497Q=−114.631+120.6803lnC0.991**−114.631
      P0为不施磷、P60为低施磷量[60 kg(P2O5)·hm−2]、P90为常规施磷肥[90 kg(P2O5)·hm−2]、P3为高施磷量[120 kg(P2O5)·hm−2]。C为平衡溶液磷浓度, Q为土壤对磷吸附量, Qm为磷最大吸附量, K1为吸附亲和力常数, K2K3为吸附容量指标, 1/na为吸附强度系数。P0 is no phosphorus fertilizer, P1 is low-level phosphorus fertilizer [60 kg(P2O5)·hm−2], P60 is conventional phosphorus fertilizer [90 kg(P2O5)·hm−2], P120 is high-level phosphorus fertilizer [120 kg(P2O5)·hm−2]. C is phosphorus content at equilibrium solution; Q is phosphorus adsorbed capacity; Qm is phosphorus maximum adsorbed capacity; K1 is adsorption affinity constant; K2 and K3 are adsorption capacity indexes; “1/n” and “a” are adsorption strength coefficients.
    下载: 导出CSV

    表  2  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷吸附量及等温吸附参数

    Table  2.   Soil phosphorus (P) absorption and its isothermal adsorption parameters of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphours levels

    处理 Treatment吸附量
    Absorption
    (mg∙kg−1)
    最大吸附量
    Maximal
    adsorption (mg∙kg−1)
    吸附亲和力常数
    Adsorption affinity
    constant
    最大缓冲容量
    Maximum buffer
    capacity (mg∙kg−1)
    标准需磷量
    Standard P
    requirement (mg∙kg−1)
    磷吸持指数
    P sorption
    index
    吸附饱和度
    Degree of P
    saturation (%)
    P0IM387.68a768.04a0.051bc39.55c7.75c18.48ab0.379f
    MM342.98b626.47b0.172a132.85a43.38a19.73a0.455f
    P60IM334.75bc625.15b0.071b44.41c8.75c15.25bc1.528d
    MM280.34d541.67e0.171a92.50b17.91b13.89cd1.285e
    P90IM309.90c601.15bc0.071b42.70c8.42c14.69c1.652cd
    MM219.06f588.42bc0.074b43.60c8.58c11.09e1.720c
    P120IM310.97c579.09d0.032c18.81d3.68d15.46bc2.229a
    MM250.96e598.97bc0.056bc33.43c6.63cd12.28de1.997b
    种植模式 Planting pattern (Pp)*************
    施磷量 P level (P)**************
    Pp×Pns********ns**
      同列数值后不同字母表示处理间差异达P<0.05显著水平; *和**分别表示达P<0.05和P<0.01显著水平, ns表示未达显著水平。Data followed by different letters in the same column are significantly different at P<0.05 level. * and ** denote significant difference at P<0.05 and P<0.01 levels, respectively; ns denote not significant.
    下载: 导出CSV

    表  3  不同施磷水平下玉米||大豆间作(IM)和玉米单作(MM)的土壤磷解吸量及滞后系数

    Table  3.   Desorption and desorption hysteresis coefficients of phosphorus in soil of maize-soybean intercropping (IM) and maize monoculture (MM) systems under different phosphours levels

    处理
    Treatment
    解吸量
    Desorption
    (mg·kg−1)
    解吸率
    Desorption
    rate (%)
    滞后系数
    Hysteresis
    coefficient
    P0IM45.11bc11.68c0.88b
    MM23.71d6.95d0.93a
    P60IM58.72a17.55b0.82c
    MM19.94d7.07d0.93a
    P90IM24.43d7.86d0.92a
    MM51.04ab23.45a0.77d
    P120IM37.82c12.19c0.88b
    MM57.41a22.89a0.77d
    种植模式 Planting pattern (Pp) ns ** **
    施磷量 Phosphorus level (P)******
    Pp×P******
      同列数值后不同字母表示处理间差异达P<0.05显著水平; *和**分别表示达P<0.05和P<0.01显著水平, ns表示未达显著水平。Data followed by different letters in the same column are significantly different at P<0.05 level. * and ** denote significant difference at P<0.05 and P<0.01 levels, respectively; ns denote not significant.
    下载: 导出CSV

    表  4  玉米||大豆间作和玉米单作红壤性质与磷吸附解吸特征参数的相关性

    Table  4.   Relationship between red soil properties and phophporus (P) sorption-desorption parameters of maize-soybean intercropping and maize monoculture systems

    指标
    Index
    pH有机质
    Organic matter
    游离氧化铁
    Free Fe2O3
    游离氧化铝
    Free Al2O3
    树脂磷
    Resin-Pi
    有效磷
    Olsen-P
    全磷
    Total P
    标准需磷量
    Standard P requirement
    磷吸持指数
    P sorption indcex
    吸附饱和度
    Degree P saturation
    吸附量 Absorption−0.645**−0.609**0.678**0.692**−0.886**−0.612**−0.735**0.2120.931**−0.645**
    解吸量 Desorption0.2320.278−0.121−0.2000.1890.3720.394−0.518**−0.2760.302
      **表示极显著相关(P<0.05); *表示显著相关(P<0.01)。** represents significant correlation at P<0.01 level; * represents significant correlation at P<0.05 level.
    下载: 导出CSV
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  • 收稿日期:  2021-05-24
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