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亚表层培肥结合地膜覆盖对河套灌区盐碱土壤有机碳和无机碳的影响

宋佳珅 张宏媛 常芳弟 于茹 张霞 王伟妮 苏伟 李玉义

宋佳珅, 张宏媛, 常芳弟, 于茹, 张霞, 王伟妮, 苏伟, 李玉义. 亚表层培肥结合地膜覆盖对河套灌区盐碱土壤有机碳和无机碳的影响[J]. 中国生态农业学报 (中英文), 2023, 31(3): 385−395 doi: 10.12357/cjea.20220749
引用本文: 宋佳珅, 张宏媛, 常芳弟, 于茹, 张霞, 王伟妮, 苏伟, 李玉义. 亚表层培肥结合地膜覆盖对河套灌区盐碱土壤有机碳和无机碳的影响[J]. 中国生态农业学报 (中英文), 2023, 31(3): 385−395 doi: 10.12357/cjea.20220749
SONG J S, ZHANG H Y, CHANG F D, YU R, ZHANG X, WANG W N, SU W, LI Y Y. Effects of subsurface organic ameliorant combined with film mulching on saline soil organic and inorganic carbon in Hetao Irrigation District[J]. Chinese Journal of Eco-Agriculture, 2023, 31(3): 385−395 doi: 10.12357/cjea.20220749
Citation: SONG J S, ZHANG H Y, CHANG F D, YU R, ZHANG X, WANG W N, SU W, LI Y Y. Effects of subsurface organic ameliorant combined with film mulching on saline soil organic and inorganic carbon in Hetao Irrigation District[J]. Chinese Journal of Eco-Agriculture, 2023, 31(3): 385−395 doi: 10.12357/cjea.20220749

亚表层培肥结合地膜覆盖对河套灌区盐碱土壤有机碳和无机碳的影响

doi: 10.12357/cjea.20220749
基金项目: 国家自然科学基金项目(31871584)、中国农业科学院创新工程联合攻关重大科研任务(CAAS-ZDRW202201)、“科技兴蒙”行动重点专项(2021EEDSCXSFQZD011)、鄂尔多斯市“揭榜挂帅”项目(JBGS-2021-001)和中央级公益性科研院所基本科研业务费专项(1610132020011)资助
详细信息
    作者简介:

    宋佳珅, 主要从事盐碱地改良利用研究。E-mail: sjs1119870671@163.com

    通讯作者:

    李玉义, 主要从事盐碱地改良利用研究。E-mail: liyuyi@caas.cn

  • 中图分类号: S156.4

Effects of subsurface organic ameliorant combined with film mulching on saline soil organic and inorganic carbon in Hetao Irrigation District

Funds: The study was supported by the National Natural Science Foundation of China (31871584), the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences (CAAS-ZDRW202201), Inner Mongolia Autonomous Region Research Project (2021EEDSCXSFQZD011), the “Open the List” in Charge of the Science and Technology Project of Ordos (JBGS-2021-001), and the Central Public-Interest Scientific Institution Basal Research Fund of China (1610132020011).
More Information
  • 摘要: 土壤有机碳(SOC)和无机碳(SIC)是参与全球碳循环的重要碳库。亚表层(10~30 cm)培肥结合地膜覆盖措施是干旱区优化盐碱土壤物理结构和调控土壤水盐环境的有效措施, 然而关于其如何调控0~60 cm土体SOC、SIC分布及其与土壤相关理化性状的关系尚不明确。本研究基于内蒙古河套灌区盐碱土壤6年的田间微区试验, 设置常规对照(CK)、亚表层(10~30 cm)有机培肥(OM)、地膜覆盖(PM)、亚表层有机培肥+地膜覆盖(OM+PM) 4个处理, 测定了2019—2020年0~60 cm剖面SOC、SIC、全碳(TC)含量以及土壤理化指标(土壤水分、盐分、pH和全氮), 分析了TC、SOC、SIC变化特征及其影响因素。结果表明: OM和OM+PM处理较CK和PM处理显著增加0~40 cm土层SOC含量31.9%~195.6% (P<0.05), 显著增加40~60 cm SOC含量33.7%~49.4% (P<0.05, 仅2020年), 但显著降低0~40 cm SIC含量9.9%~35.0% (P<0.05)。基于SOC和SIC的变化, OM+PM较CK处理显著增加2019年20~60 cm TC含量10.4%~39.4% (P<0.05), 并显著增加2020年0~20 cm TC含量13.0% (P<0.05)。回归分析结果进一步说明, 覆膜条件下补充亚表层培肥, 使总碳库变化的主导因素由SIC转变为SOC。冗余分析结果表明土壤理化性质是影响土壤碳库的主要因素(解释度为60.7%~91.9%), 其中全氮和pH是0~40 cm土壤碳库的主要影响因子, 而40~60 cm土壤碳库主要受盐分和pH影响。相关性分析结果表明SOC与SIC表现为完全相反的变化规律, 其中SOC与全氮极显著正相关, 与盐分和pH呈极显著负相关(P<0.01); SIC与全氮呈极显著负相关, 与pH呈极显著正相关(P<0.01)。因此, 亚表层培肥结合地膜覆盖可以通过增加SOC来弥补SIC的损失进而实现碳积累, 是该区域盐碱地增加固碳潜力的有效措施。
  • 图  1  研究区2019—2020年作物生长期月降雨(MP)和月平均气温(MAT)

    Figure  1.  Monthly precipitation (MP) and mean air temperature (MAT) during crop growth seasons in 2019 and 2020 in the study area

    图  2  2019—2020年不同亚表层培肥结合地膜覆盖处理下不同土层土壤全碳(a、b)、有机碳(c、d)和无机碳(e、f)含量

    CK: 常规对照; OM: 亚表层有机培肥; PM: 地膜覆盖; OM+PM: 亚表层有机培肥+地膜覆盖。不同小写字母表示同一土层不同处理间差异显著(P<0.05)。CK: conventional control; OM: subsurface organic ameliorant; PM: film mulching; OM+PM: subsurface organic ameliorant and film mulching. Different lowercase letters mean significant differences (P<0.05) under different treatments for the same soil layer.

    Figure  2.  Contents of soil total carbon (TC; a, b), organic carbon (SOC; c, d) and inorganic carbon (SIC; e, f) of different soil layers under different treatments of subsurface organic ameliorant and film mulching in 2019 and 2020

    图  3  不同亚表层培肥结合地膜覆盖处理下土壤有机碳(SOC)、无机碳(SIC)及全碳(TC)间相关性分析

    CK: 常规对照; OM: 亚表层有机培肥; PM: 地膜覆盖; OM+PM: 亚表层有机培肥+地膜覆盖。实线和阴影区域分别表示线性模型拟合和95%置信区间。CK: conventional control; OM: subsurface organic ameliorant; PM: film mulching; OM+PM: subsurface organic ameliorant and film mulching. The dotted lines and shadow areas indicate linear model fits and 95% confidence intervals, respectively.

    Figure  3.  Correlation analysis among soil organic carbon (SOC), inorganic carbon (SIC) and total carbon (TC) contents under different treatments of subsurface organic ameliorant and film mulching

    图  4  不同亚表层培肥结合地膜覆盖处理下不同土层理化性状与碳含量之间相关性的冗余分析(a, d, g)、土壤理化性状对土壤碳含量变化的解释率(b, e, h)及两者间相关性分析(c, f, i)

    CK: 常规对照; OM: 亚表层有机培肥; PM: 地膜覆盖; OM+PM: 亚表层有机培肥+地膜覆盖。TC: 全碳; SOC: 有机碳; SIC: 无机碳; TN: 全氮; Moisture: 含水率; Salt: 盐分。CK: conventional control; OM: subsurface organic ameliorant; PM: film mulching; OM+PM: subsurface organic ameliorant and film mulching. TC: total carbon; SOC: organic carbon; SIC: inorganic carbon; TN: total nitrogen. *: P<0.05; **: P<0.01.

    Figure  4.  Redundancy analyses (RDA) of the correlations between soil physicochemical properties and carbon content (a, d, g), and the explained rates of soil physicochemical properties on variance of soil carbon (b, e, h), and Pearson correlation among them (c, f, i) of different soil layers under different treatments of subsurface organic ameliorant and film mulching

    表  1  2019—2020年不同亚表层培肥结合地膜覆盖处理对不同土层土壤理化性质的影响

    Table  1.   Soil physicochemical properties of different layers under different treatments of subsurface organic ameliorant and film mulching in 2019 and 2020

    理化性质
    Physicochemical property
    处理
    Treatment
    20192020
    0~20 cm20~40 cm40~60 cm0~20 cm20~40 cm40~60 cm
    全氮
    Total N
    (g∙kg−1)
    CK0.71±0.01b0.61±0.03c0.69±0.03a0.69±0.06b0.61±0.04c0.55±0.05a
    OM0.96±0.01a0.88±0.06b0.72±0.05a1.18±0.03a0.86±0.03b0.56±0.05a
    PM0.79±0.02b0.65±0.03c0.72±0.03a0.69±0.04b0.63±0.04c0.56±0.05a
    OM+PM0.96±0.05a1.21±0.05a0.72±0.05a1.27±0.01a1.15±0.03a0.56±0.05a
    含水率
    Moisture
    (%)
    CK9.28±0.14b13.27±0.06b14.97±0.25c13.83±0.36a14.00±0.09b14.47±0.44c
    OM5.23±0.00c13.81±0.43b17.97±0.34a10.97±0.56b14.52±0.10b16.89±0.16a
    PM10.50±0.51a15.80±0.22a17.33±0.42a13.19±0.50a16.25±0.01a17.51±0.29a
    OM+PM4.93±0.14c10.90±0.52c16.11±0.36b11.74±0.07b10.55±0.31c15.99±0.12b
    含盐量
    Salt content
    (g∙kg−1)
    CK4.43±0.22a2.58±0.13a2.13±0.33a3.59±0.06a2.28±0.15a2.65±0.06a
    OM3.73±0.12b2.06±0.21b2.18±0.12a2.37±0.08b2.20±0.11a2.55±0.04a
    PM3.97±0.06ab2.69±0.12a2.44±0.12a3.49±0.00a2.38±0.04a2.69±0.10a
    OM+PM2.98±0.19c1.90±0.02b2.31±0.29a2.11±0.17b2.06±0.02a2.58±0.26a
    pHCK8.03±0.04a8.25±0.00a8.21±0.05a7.91±0.07a8.21±0.11a8.26±0.03ab
    OM7.74±0.11bc7.62±0.01b7.90±0.02b7.67±0.11b7.55±0.03b8.14±0.02b
    PM7.96±0.08ab8.12±0.08a8.10±0.07a7.98±0.02a8.17±0.01a8.29±0.01a
    OM+PM7.70±0.03c7.59±0.05b7.91±0.03b7.76±0.05ab7.31±0.08c7.97±0.08c
      CK: 常规对照; OM: 亚表层有机培肥; PM: 地膜覆盖; OM+PM: 亚表层有机培肥+地膜覆盖。不同小写字母表示同一土层不同处理间差异显著(P<0.05)。CK: conventional control; OM: subsurface organic ameliorant; PM: film mulching; OM+PM: subsurface organic ameliorant and film mulching. Different lowercase letters mean significant differences (P<0.05) under different treatments for the same soil layer.
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出版历程
  • 收稿日期:  2022-09-28
  • 录用日期:  2022-12-26
  • 网络出版日期:  2023-02-10
  • 刊出日期:  2023-03-10

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