土壤质地影响生物结皮对土壤属性的作用程度
作者:
作者单位:

(1.西北农林科技大学水土保持科学与工程学院(水土保持研究所),陕西 咸阳 712100;2.中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 咸阳 712100;3.西北农林科技大学林学院,陕西 咸阳 712100)

作者简介:

张文芳(1999-),硕士研究生,研究方向为生物结皮生态功能。E-mail:2186877408@qq.com。

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基金项目:

宁夏回族自治区重点研发计划(2022BEG03053);国家自然科学基金(41907056);中国科学院“西部之光”人才培养计划(XAB2022YW01)。


Soil texture affects the effect degree of biological soil crusts on soil properties
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Affiliation:

(1.College of Soil and Water Conservation Science and Engineering(Institute of Soil and Water Conservation),Northwest A & F University,Xianyang Shaanxi 712100;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Xianyang Shaanxi 712100;3.College of Forestry,Northwest A & F University,Xianyang Shaanxi 712100)

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    摘要:

    生物结皮广泛分布于干旱与半干旱区,对表层土壤属性具有显著影响。然而,不同类型或发育程度的生物结皮对不同土壤质地条件下土壤属性的影响是否相同,以及生物结皮与土壤质地是否存在交互作用等问题仍不清楚。以黄土高原粉壤土、砂壤土和砂土上发育的不同类型生物结皮(藻结皮、混合结皮和藓结皮)为研究对象,比较不同土壤质地条件下各类型生物结皮对土壤属性的影响差异。结果表明:(1)粉壤土和砂壤土上生物结皮对土壤颗粒组成无明显影响,而砂土生物结皮显著提高了黏粒、细粉粒及粗粉粒的含量。其中,生物结皮对砂土粗粉粒含量的作用最大;不同类型的生物结皮中,混合结皮对砂土颗粒组成的总体影响最大,藓结皮影响深度最深,为生物结皮层下5 cm。(2)不同土壤质地的生物结皮均能降低土壤容重,其中砂土藓结皮降低土壤容重程度最大,降低了17%。(3)3种土壤质地的生物结皮均能不同程度提高土壤有机质及全氮含量,其中砂土生物结皮影响程度最大,且藓结皮影响程度最显著,其有机质含量和全氮含量分别是对照的17.6和13.5倍,影响深度为生物结皮层下10 cm。(4)土壤质地和生物结皮类型对土壤容重、土壤有机质及全氮存在显著交互效应,且单一作用均大于二者交互作用。(5)砂土生物结皮对土壤属性影响最大,且藓结皮影响程度更显著。综上所述,黄土高原砂土生物结皮对土壤属性的影响程度最大,且藓结皮对土壤属性具有更明显的改善效果。研究结果可为深化生物结皮生态功能及生态系统可持续管理提供理论依据。

    Abstract:

    Biological soil crusts (biocrusts) are widely distributed in arid and semi-arid regions,and have a significant impact on topsoil properties. However,it is still unclear whether the effects of different types or development stages of biocrusts on soil properties under different soil texture conditions,and whether biocrusts interact with soil texture. In this study,different types of biocrusts(algal crusts,mixed crusts and moss crusts)developed on silty loam,sandy loam and sandy soils on the Loess Plateau were used as research objects,and the effects of different types of biocrusts on soil properties under different soil texture conditions were compared,and the results showed that:(1)Biocrusts on silty loam and sandy loam had no significant effect on soil particle composition,while biocrusts on sandy soil significantly increased the content of clay,fine powder and coarse powder. Among them,biocrusts had the greatest effect on the content of coarse powder on sand soil. Among the different types of biocrusts,mixed crusts had the greatest effect on the composition of sand particles,and moss crusts had the deepest influence depth,which was 5 cm below the biocrusts.(2)Biocrusts with different soil textures could reduce soil bulk density,and moss crusts on sandy soil had the greatest reduction in soil bulk density,reducing it by 17%.(3)Biocrusts of the three soil textures could increase the soil organic matter and total nitrogen content to different degrees,among which the biocrusts of sandy soil had the greatest degree of influence,and the influence degree of moss crusts was the most significant,and the organic matter content and total nitrogen content were 17.6 and 13.5 times that of the control,and the depth of influence was 10 cm below the biocrusts.(4)There were significant interaction effects between soil texture and biocrusts type on soil bulk density,soil organic matter and total nitrogen,and the single effect was greater than the interaction between the two.(5)Biocrusts on sandy soil had the greatest influence on soil properties,and moss crusts had a more significant impact. In summary,biocrusts of sandy soil on the Loess Plateau had the greatest influence on soil properties,and the moss crusts had a more obvious effect on soil properties. The research results can provide a theoretical basis for deepening the ecological function of biocrusts and sustainable ecosystem management.

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张文芳,高丽倩,欧阳文峰,孙会,赵允格.土壤质地影响生物结皮对土壤属性的作用程度[J].中国土壤与肥料,2024,(8):11-20.

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  • 收稿日期:2023-09-17
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  • 录用日期:2023-10-26
  • 在线发布日期: 2024-11-08
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