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轮耕对豫北潮土速效养分及可溶性有机碳结构特性的影响

朱宣霖 朱长伟 陈琛 李洋 牛润芝 姜桂英 杨锦 申凤敏 刘芳 刘世亮

朱宣霖, 朱长伟, 陈琛, 李洋, 牛润芝, 姜桂英, 杨锦, 申凤敏, 刘芳, 刘世亮. 轮耕对豫北潮土速效养分及可溶性有机碳结构特性的影响[J]. 中国生态农业学报 (中英文), 2022, 30(4): 683−693 doi: 10.12357/cjea.20210743
引用本文: 朱宣霖, 朱长伟, 陈琛, 李洋, 牛润芝, 姜桂英, 杨锦, 申凤敏, 刘芳, 刘世亮. 轮耕对豫北潮土速效养分及可溶性有机碳结构特性的影响[J]. 中国生态农业学报 (中英文), 2022, 30(4): 683−693 doi: 10.12357/cjea.20210743
ZHU X L, ZHU C W, CHEN C, LI Y, NIU R Z, JIANG G Y, YANG J, SHEN F M, LIU F, LIU S L. Effects of rotation tillage on available nutrients and structural characteristics of dissolved organic carbon of Fluvo-aquic soil in northern Henan Province[J]. Chinese Journal of Eco-Agriculture, 2022, 30(4): 683−693 doi: 10.12357/cjea.20210743
Citation: ZHU X L, ZHU C W, CHEN C, LI Y, NIU R Z, JIANG G Y, YANG J, SHEN F M, LIU F, LIU S L. Effects of rotation tillage on available nutrients and structural characteristics of dissolved organic carbon of Fluvo-aquic soil in northern Henan Province[J]. Chinese Journal of Eco-Agriculture, 2022, 30(4): 683−693 doi: 10.12357/cjea.20210743

轮耕对豫北潮土速效养分及可溶性有机碳结构特性的影响

doi: 10.12357/cjea.20210743
基金项目: 国家重点研发计划重点专项项目(2021YFD1700900)、国家自然科学基金项目(41401327)、河南省重点研发与推广专项项目(192102110161)和河南省高等学校重点科研项目(20A210024)资助
详细信息
    作者简介:

    朱宣霖, 主要研究方向为土壤培肥与调控。E-mail: 3223024115@qq.com

    通讯作者:

    姜桂英, 主要研究方向为土壤培肥与调控, E-mail: jgy9090@126.com

    刘世亮, 主要研究方向为土壤培肥与调控, E-mail: shlliu70@163.com

  • 中图分类号: S158.5

Effects of rotation tillage on available nutrients and structural characteristics of dissolved organic carbon of Fluvo-aquic soil in northern Henan Province

Funds: This study was supported by the National Key R&D Program of China (2021YFD1700900), the National Natural Science Foundation of China (41401327), the Key R&D and Promotion Project of Henan Province (192102110161), and the Key Research Project of Henan Colleges and Universities (20A210024).
More Information
  • 摘要: 本研究以豫北潮土为研究对象, 采用大田小区试验研究不同轮耕模式对不同深度土壤速效养分与可溶性有机碳结构特性的影响, 以筛选适合豫北潮土的轮耕模式。本研究于小麦季实施5种不同的耕作模式, 3年为一个周期: 1)连续旋耕(RT-RT-RT); 2)深耕-旋耕-旋耕(DT-RT-RT); 3)深耕-旋耕-条旋耕(DT-RT-SRT); 4)深耕-条旋耕-条旋耕(DT-SRT-SRT); 5)深耕-条旋耕-旋耕(DT-SRT-RT)。测定并分析土壤碱解氮、速效磷、速效钾、可溶性有机碳含量及其腐殖化程度、有机质分子量与聚合度、疏水组分比例、芳香化程度与分子量。结果显示, 各处理间的差异主要表现在0~40 cm土层。相较于RT-RT-RT, 轮耕处理对各项指标均有显著影响, 其中以DT-SRT-RT处理对各指标的影响最为突出, 具体表现为DT-SRT-RT处理显著增加了0~40 cm土层碱解氮、速效磷、速效钾含量(P<0.05), 最高增加17.8%、17.2%和19.6%。在0~40 cm土层中, DT-SRT-RT处理较RT-RT-RT最高增加了20.2%土壤可溶性有机碳含量(P<0.05)、53.1%腐殖化程度和27.4%疏水组分比例(P<0.05)。DT-RT-SRT处理较RT-RT-RT处理显著增加20~30 cm土层芳香化程度与分子量(P<0.05), 最高增加21.0%, 10~30 cm土层有机质分子量与聚合度显著降低36.7% (P<0.05)。土层深度与轮耕处理的单因素以及二者之间的交互效应均显著影响土壤速效养分和可溶性有机碳及其结构特性(P<0.05)。所有处理各指标间的相关性随土层深度的增加而减弱。综上所述, 相较于连续旋耕(RT-RT-RT), 深耕-条旋耕-旋耕模式(DT-SRT-RT)提高了土壤速效养分和可溶性有机碳含量, 增加可溶性有机碳的结构复杂性, 推荐为豫北潮土区适宜的轮耕模式。
  • 图  1  不同处理下不同土层土壤碱解氮(A)、速效磷(B)和速效钾(C)含量

    RT-RT-RT: 连续旋耕; DT-RT-RT: 深耕-旋耕-旋耕; DT-RT-SRT: 深耕-旋耕-条旋耕; DT-SRT-SRT: 深耕-条旋耕-条旋耕; DT-SRT-RT: 深耕-条旋耕-旋耕。不同小写字母表示同一取样深度不同处理间在P<0.05水平差异显著。RT-RT-RT: continuous rotary tillage; DT-RT-RT: deep tillage-rotary tillage-rotary tillage; DT-RT-SRT: deep tillage-rotary tillage-strip rotary tillage; DT-SRT-SRT: deep tillage-strip rotary tillage-strip rotary tillage; DT-SRT-RT: deep tillage-strip rotary tillage-rotary tillage. Different lowercase letters mean significant differences among treatments at P<0.05 level in the same sample depth.

    Figure  1.  Alkali hydrolyzable nitrogen (A), available phosphorus (B) and available potassium (C) contents in different soil layers under different treatments

    图  2  不同处理不同土层土壤可溶性有机碳含量(A)、腐殖化程度(A250/A365, B)、有机质分子量与聚合度(A300/A400, C)、疏水组分比例(SUVA260, D)和芳香化程度与分子量大小(SUVA280, E)

    RT-RT-RT: 连续旋耕; DT-RT-RT: 深耕-旋耕-旋耕; DT-RT-SRT: 深耕-旋耕-条旋耕; DT-SRT-SRT: 深耕-条旋耕-条旋耕; DT-SRT-RT: 深耕-条旋耕-旋耕。不同小写字母表示同一取样深度不同处理间在P<0.05水平差异显著。RT-RT-RT: continuous rotary tillage; DT-RT-RT: deep tillage-rotary tillage-rotary tillage; DT-RT-SRT: deep tillage-rotary tillage-strip rotary tillage; DT-SRT-SRT: deep tillage-strip rotary tillage-strip rotary tillage; DT-SRT-RT: deep tillage-strip rotary tillage-rotary tillage. Different lowercase letters mean significant differences among different treatments at P<0.05 level in the same sample depth.

    Figure  2.  Soil dissolved organic carbon content (A), degree of humification (A250/A365, B), molecular weight and polymerization degree of organic matter (A300/A400, C), proportions of hydrophobic components (SUVA260, D) and degree of aromatization and molecular weight (SUVA280, E) in different soil layers under different treatments

    图  3  0~50 cm土层不同深度土壤养分指标与可溶性有机物紫外光谱参数的相关性分析

    N、P、K 分别代表碱解氮、速效磷、速效钾; DOC、A250/A365、A300/A400、SUVA260、SUVA280分别代表可溶性有机碳、腐殖化程度、有机质分子量与聚合度、疏水组分比例、芳香化程度与分子量大小。 N, P, K represent alkaline hydrolyzable nitrogen, available phosphorus and available potassium; DOC, A250/A365, A300/A400, SUVA260 and SUVA280 represent dissolved organic carbon, degree of humification, molecular weight and polymerization degree of organic matter, hydrophobic components, degree of aromatization and molecular weight.

    Figure  3.  Correlation analysis of soil nutrient indices and UV spectral parameters of dissolved organic matter in different depthes of 0−50 cm soil layer

    表  1  可溶性有机物(DOM)的紫外–可见光谱特征参数描述及表征意义

    Table  1.   Description and significance of characteristic parameters of ultraviolet-visible spectroscopy of dissolved organic matter (DOM)

    吸光度
    Wavelength (nm)
    定义
    Definition
    意义
    Significance
    A250/A365DOM滤出液在250 nm和365 nm处吸光度的比值
    The ratio of absorbance of DOM filtrate at 250 nm and 365 nm
    表征DOM腐殖化程度[20]
    Indicates the degree of DOM humification
    A300/A400DOM滤出液在300 nm和400 nm处吸光度的比值
    The ratio of absorbance of DOM filtrate at 300 nm and 400 nm
    表征DOM分子量与聚合度[21]
    Indicates the molecular weight and degree of polymerization of DOM
    SUVA260单位DOM浓度在波长260 nm处的吸收系数
    Absorption coefficient of unit DOM concentration at wavelength 260 nm
    表征DOM疏水性组分比例[16-17]
    Indicates the proportion of DOM hydrophobic components
    SUVA280单位DOM浓度在波长280 nm处的吸收系数
    Absorption coefficient of unit DOM concentration at wavelength 280 nm
    表征DOM芳香化程度和分子量大小[18-19]
    Indicates the degree of aromatization and molecular weight of DOM
      
    下载: 导出CSV

    表  2  轮耕模式对不同土层土壤速效养分含量的主体间效应检验

    Table  2.   Tests on the intersubjective effects of rotation tillage patterns on soil available nutrients contents in different soil layers


    Source
    土壤养分
    Soil nutrient
    Ⅲ 型平方和
    Sum of squared deviations from mean
    df均方
    Mean square
    FP
    土层
    Soil layer
    碱解氮 Alkaline hydrolysis nitrogen30 433.34647608.348956.670
    有效磷 Available phosphorus3279.2834819.823538.850
    速效钾 Available potassium59 707.959414 926.992893.770
    轮耕
    rotation tillage
    碱解氮 Alkaline hydrolysis nitrogen92.541423.1427.240
    有效磷 Available phosphorus21.50545.3823.210
    速效钾 Available potassium523.9744130.9925.400
    土层×轮耕
    Soil layer ×
    rotation tillage
    碱解氮 Alkaline hydrolysis nitrogen39.188162.452.880.002
    有效磷 Available phosphorus9.668160.602.610.005
    速效钾 Available potassium320.0271620.0023.880
    下载: 导出CSV

    表  3  轮耕模式对不同土层土壤可溶性有机碳及其结构特性主体间效应的检验

    Table  3.   Tests on the intersubjective effects of rotation tillage patterns on soil dissolved organic carbon and its structural characteristics in different soil layers


    Source
    因变量
    Dependent variable
    Ⅲ 型平方和
    Sum of squared deviations from mean
    df均方
    Mean square
    FP
    土层
    Soil layer
    可溶性有机碳含量 Dissolved organic carbon content21 246.0845311.524180.360
    腐殖化程度 Degree of humification1839.134459.781363.440
    有机质分子量与聚合度
    Molecular weight and polymerization degreee of organic matter
    2199.534549.881036.170
    疏水组分比例 Hydrophobic components0.5940.15942.020
    芳香化程度与分子量大小
    Degree of aromatization and molecular weight
    0.4740.121305.510
    轮耕
    Rotation tillage
    可溶性有机碳含量 Dissolved organic carbon content192.42448.1037.860
    腐殖化程度 Degree of humification27.1546.7920.130
    有机质分子量与聚合度
    Molecular weight and polymerization degree of organic matter
    45.66411.4121.510
    疏水组分比例 Hydrophobic components0.01240.00320.040
    芳香化程度与分子量大小
    Degree of aromatization and molecular weight
    0.00740.00220.860
    土层×轮耕
    Soil layer × rotation tillage
    可溶性有机碳含量 Dissolved organic carbon content114.126167.135.610
    腐殖化程度 Degree of humification16.671161.043.090.001
    有机质分子量与聚合度
    Molecular weight and polymerization degree of organic matter
    30.861161.933.640