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毛乌素沙地生物土壤结皮对油蒿群落土壤酶活性的影响

孙永琦 冯薇 张宇清 秦树高 毛赫楠

孙永琦, 冯薇, 张宇清, 秦树高, 毛赫楠. 毛乌素沙地生物土壤结皮对油蒿群落土壤酶活性的影响[J]. 北京林业大学学报, 2020, 42(11): 82-90. doi: 10.12171/j.1000-1522.20190082
引用本文: 孙永琦, 冯薇, 张宇清, 秦树高, 毛赫楠. 毛乌素沙地生物土壤结皮对油蒿群落土壤酶活性的影响[J]. 北京林业大学学报, 2020, 42(11): 82-90. doi: 10.12171/j.1000-1522.20190082
Sun Yongqi, Feng Wei, Zhang Yuqing, Qin Shugao, Mao Henan. Effects of biological soil crusts on soil enzyme activities of Artemisia ordosica community in the Mu Us Desert of northwestern China[J]. Journal of Beijing Forestry University, 2020, 42(11): 82-90. doi: 10.12171/j.1000-1522.20190082
Citation: Sun Yongqi, Feng Wei, Zhang Yuqing, Qin Shugao, Mao Henan. Effects of biological soil crusts on soil enzyme activities of Artemisia ordosica community in the Mu Us Desert of northwestern China[J]. Journal of Beijing Forestry University, 2020, 42(11): 82-90. doi: 10.12171/j.1000-1522.20190082

毛乌素沙地生物土壤结皮对油蒿群落土壤酶活性的影响

doi: 10.12171/j.1000-1522.20190082
基金项目: 毛乌素沙地地衣结皮层微生物群落结构及其固碳功能(31600584)
详细信息
    作者简介:

    孙永琦。主要研究方向:荒漠化防治。Email:sunyongqibjfu@163.com 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:

    冯薇,博士,讲师。主要研究方向:荒漠化防治。Email:weifeng@bjfu.edu.cn 地址:同上

Effects of biological soil crusts on soil enzyme activities of Artemisia ordosica community in the Mu Us Desert of northwestern China

  • 摘要:   目的  通过研究生物土壤结皮对毛乌素沙地油蒿群落土壤酶活性的影响,探究半干旱区不同类型生物土壤结皮对土壤养分周转的作用,为认识生物土壤结皮对沙地植被恢复的影响提供理论参考。  方法  以宁夏盐池毛乌素沙地油蒿灌丛间的裸地、地衣结皮和苔藓结皮为研究对象,分析油蒿灌丛间裸地土壤(0 ~ 5 cm)、地衣结皮层和苔藓结皮层(0 ~ 1 cm)及其下层土壤(1 ~ 5 cm)的土壤理化性质和土壤酶活性的变化特征。  结果  (1)地衣结皮层和苔藓结皮层均显著改善油蒿灌木群落的土壤理化性质,且苔藓结皮层改善作用更为明显。地衣结皮层和苔藓结皮层相比油蒿灌丛间裸地,土壤有机碳含量(SOC)分别提高3.30倍和6.51倍,微生物量碳含量(MBC)分别显著提高2.79倍和6.58倍,微生物量氮含量(MBN)分别显著提高3.49倍和12.73倍,全氮含量(TN)分别提高2.67倍和4.46倍,全磷含量(TP)分别显著提高1.82倍和2.06倍。生物土壤结皮下层土壤与灌丛间裸地相比微生物量氮(MBN)、TN和TP之间无显著差异,MBC显著降低。(2)与油蒿灌丛间裸地相比,地衣结皮层和苔藓结皮层显著提高了土壤转化酶和脲酶活性,其中,地衣结皮层分别提高转化酶和脲酶活性3.58倍和2.80倍。苔藓结皮层显著提高转化酶活性4.23倍。碱性磷酸酶活性则无显著影响。另外,生物土壤结皮层下土壤3种酶活性均无显著提高。(3)土壤理化性质显著影响3种土壤酶活性。SOC、MBC、MBN、TN和TP与土壤转化酶活性呈显著正相关,pH与土壤转化酶活性显著负相关。SOC、MBN和TP与土壤脲酶活性显著正相关。pH与土壤碱性磷酸酶活性显著负相关。  结论  地衣结皮和苔藓结皮均能加速油蒿灌丛土壤碳素周转;氮素周转则主要由地衣结皮调控。另外,仅结皮层能提高油蒿群落养分周转。研究结果表明,生物土壤结皮可以加速油蒿群落间土壤养分的周转和提高土壤质量,促进该区域植被和荒漠生态系统的恢复。

     

  • 图  1  油蒿灌丛间裸地土壤、生物结皮层及层下土壤酶活性

    数据为平均值 ± 标准误,不同字母表示样品间土壤酶活性之间存在显著差异(n = 3; P < 0.05)。Bare. 裸地;L. 地衣结皮层;Ls. 地衣结皮层下土壤;M. 苔藓结皮层;Ms. 苔藓结皮层下土壤。Data represent mean ± SE, different letters indicate significant differences in soil enzyme activities among samples (n = 3; P < 0.05). Bare, bare land; L, lichen crust layer; Ls, soil beneath lichen crust layer; M, moss crust layer; Ms, soil beneath moss crust layer.

    Figure  1.  Soil enzyme activities of soil among bare land, biological soil crusts and the underneath soil in A. ordosica shrub

    图  2  油蒿灌丛间裸地土壤、生物结皮层及下层土壤理化性质和土壤酶活性主坐标分析及其相关性分析

    Figure  2.  Principal component analysis and correlation analysis on soil physicochemical properties and soil enzyme activities among bare land, biological soil crusts and the underneath soil in A. ordosica shrub

    表  1  样地基本概况

    Table  1.   Basic information of sample plots

    样地
    Sample plot
    坡度
    Slope/(°)
    结皮特征
    Caracteristics of biological soil crusts (BSCs)
    主要植物种
    Main plant species
    植被盖度
    Vegetation coverage/%
    样地1
    Sample plot 1
    3 生物结皮总盖度95%,地衣结皮相对盖度45%, 苔藓结皮相对盖度40%
    Total coverage of BSCs is 95%, relative coverage of lichen crust is 45%, relative coverage of moss crust is 40%
    油蒿 Artemisia ordosica
    细叶小苦荬 Ixeridium gracile
    虫实 Corispermum mongolicum
    沙鞭 Psammochloa villosa
    85
    样地2
    Sample plot 2
    7 生物结皮总盖度85%,地衣结皮相对盖度50%,苔藓结皮相对盖度40%
    Total coverage of BSCs is 85%, relative coverage of lichen crust is 50%, relative coverage of moss crust is 40%
    油蒿 Artemisia ordosica
    细叶小苦荬 Ixeridium gracile
    刺藜 Chenopodium aristatum
    75
    样地3
    Sample plot 3
    5 生物结皮总盖度85%,地衣结皮相对盖度40%, 苔藓结皮相对盖度45%
    Total coverage of BSCs is 85%, relative coverage of lichen crust is 40%, relative coverage of moss crust is 45%
    油蒿 Artemisia ordosica
    细叶小苦荬 Ixeridium gracile
    虫实 Corispermum mongolicum
    沙生针茅 Stipa glareosa
    80
    下载: 导出CSV

    表  2  油蒿灌丛间裸地、生物结皮层及层下土壤理化性质

    Table  2.   Physicochemical properties of soil among bare land, biological soil crusts, and the underneath soil in Artemisia ordosica shrub

    理化性质
    Physicochemical property
    裸地
    Bare land
    地衣结皮层
    Lichen crust layer
    地衣结皮层下土壤
    Soil underlying lichen crust layer
    苔藓结皮层
    Moss crust layer
    苔藓结皮层下土壤
    Soil underlying moss crust layer
    pH 8.24 ± 0.03a 8.17 ± 0.23a 8.79 ± 0.12b 7.66 ± 0.06c 8.33 ± 0.02a
    SWC/% 0.64 ± 0.21ab 0.25 ± 0.06a 1.00 ± 0.18ab 2.25 ± 0.57c 1.77 ± 0.17b
    SOC/(g·kg−1) 2.66 ± 0.66a 8.77 ± 1.61b 3.05 ± 0.96a 17.33 ± 1.09c 4.59 ± 0.37a
    MBC/(mg·kg−1) 206.47 ± 13.87ab 575.81 ± 152.50b 65.06 ± 43.60a 1 441.02 ± 180.14c 84.68 ± 18.84a
    MBN/(mg·kg−1) 17.83 ± 1.40a 62.27 ± 14.32b 17.22 ± 7.32a 226.99 ± 30.80c 21.70 ± 1.94ab
    TN/% 0.03 ± 0.00a 0.07 ± 0.01ab 0.02 ± 0.00a 0.11 ± 0.04b 0.03 ± 0.00a
    TP/(g·kg−1) 0.15 ± 0.00a 0.28 ± 0.04ab 0.23 ± 0.05a 0.32 ± 0.02b 0.24 ± 0.02a
    注:数据表示为平均值 ± 标准误,不同小写字母表示样品间土壤理化性质差异性显著(n = 3,P < 0.05)。SWC. 土壤含水量;SOC. 土壤有机碳含量;TN. 土壤全氮含量;TP. 土壤全磷含量;MBC. 土壤微生物量碳含量;MBN. 土壤微生物量氮含量。下同。Notes: data represent the mean ± SE (n = 3). Varied lowercase letters indicate significant differences in soil physicochemical properties among samples (n = 3,P < 0.05). SWC, soil water content; SOC, soil organic carbon content; TN, total nitrogen content; TP, total phosphorus content; MBC, soil microbial biomass carbon content; MBN, soil microbial biomass nitrogen content. The same below.
    下载: 导出CSV

    表  3  土壤理化性质对土壤酶活性的相关性分析

    Table  3.   Correlation analysis between soil properties and soil enzyme activities

    理化性质
    Physicochemical property
    转化酶活性
    Invertase activity
    脲酶活性
    Urease activity
    碱性磷酸酶活性
    Alkaline phosphatase activity
    pH −0.845 −0.059 −0.588
    SWC 0.186 0.381 0.084
    SOC 0.908 0.371 0.376
    MBC 0.922 0.391 0.347
    MBN 0.883 0.405 0.297
    TN 0.868 0.412 0.285
    TP 0.763 −0.652 0.294
    注:黑体表示相关性显著(n = 3;P < 0.05)。Note: boldface indicates a significant correlation (n = 3; P < 0.05).
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-02-20
  • 修回日期:  2019-03-22
  • 网络出版日期:  2020-11-14
  • 刊出日期:  2020-12-14

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