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    祁连山不同草地类型区土壤有机碳组份的差异

    梁冰妍 徐海燕 吴晓东 种碧莹 甘子鹏 薛守业

    梁冰妍, 徐海燕, 吴晓东, 种碧莹, 甘子鹏, 薛守业, 2024. 祁连山不同草地类型区土壤有机碳组份的差异. 地球科学, 49(4): 1487-1497. doi: 10.3799/dqkx.2022.261
    引用本文: 梁冰妍, 徐海燕, 吴晓东, 种碧莹, 甘子鹏, 薛守业, 2024. 祁连山不同草地类型区土壤有机碳组份的差异. 地球科学, 49(4): 1487-1497. doi: 10.3799/dqkx.2022.261
    Liang Bingyan, Xu Haiyan, Wu Xiaodong, Chong Biying, Gan Zipeng, Xue Shouye, 2024. Differences of Soil Organic Carbon Components in Different Grassland Types of Qilian Mountain. Earth Science, 49(4): 1487-1497. doi: 10.3799/dqkx.2022.261
    Citation: Liang Bingyan, Xu Haiyan, Wu Xiaodong, Chong Biying, Gan Zipeng, Xue Shouye, 2024. Differences of Soil Organic Carbon Components in Different Grassland Types of Qilian Mountain. Earth Science, 49(4): 1487-1497. doi: 10.3799/dqkx.2022.261

    祁连山不同草地类型区土壤有机碳组份的差异

    doi: 10.3799/dqkx.2022.261
    基金项目: 

    国家自然科学基金项目 41861011

    国家自然科学基金项目 41871060

    详细信息
      作者简介:

      梁冰妍(1997-),女,硕士研究生,主要从事土壤生态学研究.ORCID:0000-0002-4948-366X. E-mail:11200071@stu.lzjtu.edu.cn

      通讯作者:

      徐海燕,E-mail:hyxu12@163.com

    • 中图分类号: P66

    Differences of Soil Organic Carbon Components in Different Grassland Types of Qilian Mountain

    • 摘要: 为明确高寒地区土壤有机碳库的组成及稳定程度,选择祁连山地区3种草地类型区(高寒草甸、高寒草原和高寒沼泽草甸)为研究对象,分层对0~50 cm土壤中重组、轻组组分进行分离提取,测定并分析重组有机碳(heavy fraction organic carbon,HFOC)和轻组有机碳(light fraction organic carbon,LFOC)含量.结果表明,不同草地类型对土壤HFOC和LFOC含量及其分配的影响不同,HFOC、LFOC含量在土层间均具有明显的垂直变化,呈上高下低趋势,各区域间差异明显;高寒沼泽草甸LFOC含量最高,高寒草原次之,高寒草甸最低,即不同草地类型区土壤有机碳库稳定程度大小依次为:高寒草甸 > 高寒草原 > 高寒沼泽草甸;土壤pH、含水率、TC、SOC、TN含量与C/N值与土壤HFOC、LFOC含量呈极显著相关(p < 0.01).综上,祁连山草地生态系统土壤有机碳库组成及稳定程度受草地类型、土壤理化性质及环境变量影响.

       

    • 图  1  研究区位置及采样点分布

      Z1,Z2,Z3为高寒沼泽草甸;Y1,Y2,Y3为高寒草原;D1,D2,D3为高寒草甸.青藏高原植被分类数据来源(Wang et al., 2016

      Fig.  1.  Location and sampling site distribution of the study area

      图  2  不同草地类型区0~50 cm深度土壤颗粒组成

      Fig.  2.  Compositions of soil particles in 0-50 cm soil depth in different grassland types

      图  3  不同草地类型区重、轻组有机碳含量垂直分布

      a.高寒沼泽草甸;b.高寒草原;c.高寒草甸

      Fig.  3.  Vertical distribution of heavy and light fraction organic carbon in different grassland types

      图  4  不同草地类型区轻组有机碳分配比例变化

      Fig.  4.  Changes of distribution proportion of light fraction organic carbon in different grassland types

      图  5  重组有机碳、轻组有机碳与土壤变量间的相关性

      HFOC.重组有机碳;LFOC.轻组有机碳;TC.总碳;SOC.土壤有机碳;TN.总氮;C/N.碳氮比

      Fig.  5.  Correlations between heavy fraction organic carbon, light fraction organic carbon and soil variables

      表  1  采样点信息

      Table  1.   Information of sampling points

      样点 经度 纬度 海拔(m) 草地类型 主要植物种类 地上生物量(g/cm3) 地下生物量(g/cm3)
      Z1 98°44′ 38°46′ 4 072 高寒沼泽草甸 高山嵩草、黑褐穗薹草 141.60 6 602.55
      Z2 98°45′ 38°47′ 4 002 高寒沼泽草甸 高山嵩草、华扁穗草 182.24 6 207.64
      Z3 98°48′ 38°49′ 3 900 高寒沼泽草甸 高山嵩草、黑褐穗薹草 148.00 6 034.39
      Y1 99°0′ 38°50′ 3 670 高寒草原 高山嵩草、矮生嵩草 183.84 3 337.58
      Y2 99°4′ 38°46′ 3 586 高寒草原 矮生嵩草、紫花针茅 204.64 3 601.27
      Y3 99°12′ 38°42′ 3 485 高寒草原 矮生嵩草、黄花棘豆 188.16 4 585.99
      D1 99°31′ 38°28′ 3 267 高寒草甸 矮生嵩草、紫花针茅 416.64 2 484.08
      D2 99°37′ 38°24′ 3 187 高寒草甸 矮生嵩草、青藏薹草 400.96 1 327.39
      D3 99°46′ 38°18′ 3 062 高寒草甸 矮生嵩草、垂穗披碱草 690.08 2 961.78
      下载: 导出CSV

      表  2  不同草地类型区土壤变量与理化性质特征

      Table  2.   Characteristics of soil variables and physicochemical properties in different grassland types

      植被类型 土壤深度
      (cm)
      pH 电导率
      (s·m-1)
      含水率
      (%)
      总碳TC
      (g·kg-1)
      有机碳SOC
      (g·kg-1)
      总氮TN
      (g·kg-1)
      碳氮比
      C/N
      高寒沼泽草甸 0~10 7.21±0.17 Ba 15.78±3.03 Aa 82.47±2.07 Aa 111.85±1.68 Aa 105.12±3.06 Aa 8.97±0.26 Aa 11.81±0.14 Aa
      10~20 7.50±0.16 Ba 11.33±1.87 Aa 56.73±7.05 Ab 68.68±6.63 Aa 59.44±3.10 Aa 4.72±0.40 Aa 12.39±1.05 Aa
      20~30 7.47±0.30 Ba 11.17±3.10Aa 33.26±3.60 Ac 47.74±11.25 Ab 37.23±12.16 Ab 3.61±1.12 Ab 10.17±0.29 Aa
      30~40 7.62±0.32 Ba 10.90±0.17 Ba 27.88±1.68 Ac 38.40±11.46 Bb 28.46±13.29 Bb 2.64±1.29 Bb 11.45±1.52 Aa
      40~50 7.72±0.33 Ba 9.60±0.48 Ba 23.86±1.44 Ac 41.52±14.66 Ab 30.78±16.70 Ab 2.92±1.49 Ab 9.96±0.40 Aa
      高寒草原 0~10 8.03±0.09 Ac 18.50±2.00 Aa 29.08±4.39 Ba 58.35±11.29 Ba 53.03±11.49 Ba 4.63±0.81 Ba 11.23±0.49 Aa
      10~20 8.40±0.05 Ab 12.71±0.82 Ab 33.05±6.01 Aa 28.25±2.55 Bb 22.58±2.63 Bb 2.30±0.20 Bb 9.74±0.30 Aa
      20~30 8.60±0.04 Aa 12.28±0.57 Ab 22.01±2.81 Aa 21.18±2.30 Ab 14.67±0.57 Ab 1.58±0.08 Ab 9.29±0.11 Aa
      30~40 8.72±0.03 Aa 11.73±0.27 Ab 20.33±0.77 Ba 20.35±3.24 Ab 11.60±0.86 Ab 1.31±0.09 Ab 8.86±0.06 Ab
      40~50 8.78±0.04 Aa 11.31±0.08 Ab 16.19±1.07 Bb 19.17±3.86 Ab 8.44±0.60 Ab 0.88±0.09 Ab 9.78±0.93 Aa
      高寒草甸 0~10 7.84±0.17 Ac 18.63±2.27 Aa 36.12±2.80 Ba 59.41±8.11 Ba 53.75±9.21 Ba 5.29±0.63 Ba 9.94±0.66 Aa
      10~20 8.17±0.13 Ab 19.07±2.16 Aa 27.04±0.74 Bb 47.93±5.63 Aa 40.37±3.87 Aa 4.19±0.31 Aa 9.64±0.71 Aa
      20~30 8.40±0.12 Aa 19.29±2.86 Aa 22.29±1.98 Ab 43.03±4.47 Aa 28.70±3.76 Ab 3.11±0.31 Ab 9.16±0.54 Aa
      30~40 8.65±0.11 Aa 19.03±1.99 Aa 20.21±1.55 Ab 38.78±3.58 Aa 20.13±2.13 Ab 2.14±0.18 Ac 9.34±0.21 Aa
      40~50 8.73±0.05 Aa 23.01±4.87 Aa 18.80±1.14 Ac 37.95±4.27 Aa 18.08±3.23 Ac 1.86±0.31 Ac 9.66±0.09 Aa
      注:同一列A、B表示不同草地类型区域同一土壤深度的平均值差异显著(p < 0.05).同列中a、b表示同一草地类型不同土壤深度的平均值差异显著(p < 0.05).
      下载: 导出CSV
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    • 收稿日期:  2022-03-03
    • 网络出版日期:  2024-04-30
    • 刊出日期:  2024-04-25

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