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中国沙漠 ›› 2025, Vol. 45 ›› Issue (6): 37-46.DOI: 10.7522/j.issn.1000-694X.2025.00047

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接种复合藻液对河西走廊工程扰动面生物结皮及土壤性质的影响

康红梅1(), 张军1, 李鑫1, 刘金鹏2()   

  1. 1.甘肃省科学院,生物研究所 甘肃省微生物资源开发利用重点实验室,甘肃 兰州 730000
    2.甘肃省科学院,科研开发处,甘肃 兰州 730000
  • 收稿日期:2024-12-09 修回日期:2025-03-11 出版日期:2025-11-20 发布日期:2025-11-26
  • 通讯作者: 刘金鹏
  • 作者简介:康红梅(1973—),女,甘肃兰州人,博士,研究方向为生态修复技术。E-mail: lzkanghm@163.com
  • 基金资助:
    甘肃省科学院应用研究与开发项目(2020JK-02);甘肃省省级生态文明重点研发专项(24YFFA072)

Effects of artificially inoculated composite algal solutions on biological soil crusts and soil properties in engineering-disturbed areas of the Hexi Corridor

Hongmei Kang1(), Jun Zhang1, Xin Li1, Jinpeng Liu2()   

  1. 1.Key Laboratory of Microbial Resources Exploitation and Application of Gansu Province,Institute of Biology /, Gansu Academy of Sciences,Lanzhou 730000,China
    2.Department of Research and Development, Gansu Academy of Sciences,Lanzhou 730000,China
  • Received:2024-12-09 Revised:2025-03-11 Online:2025-11-20 Published:2025-11-26
  • Contact: Jinpeng Liu

摘要:

为探究人工接种复合藻液对河西走廊工程迹地生物结皮(Biological soil crusts, BSC)生长及土壤性质的影响,在甘肃古浪模拟5种工程扰动面(Disturbed surfaces, S),人工喷施复合藻液(Treatments,T),观测不同扰动面和处理下BSC生长和土壤养分等的变化。结果显示:不同的扰动面BSC生长良好,无明显风蚀发生。S对BSC的生长、土壤养分和土壤酶活性影响极其显著(P<0.001);T在短期内对BSC生长影响不明显,但随着时间的延长各扰动面BSC生物量、BSC厚度、土壤养分和土壤磷酸酶显著增加(P<0.05,2 a)。填方边坡阴坡的BSC生长最快(1.629 µg·g-1 Chl a,2 a),比3个月时的BSC生物量增加了439.4%;BSC厚度、土壤酶活性、有效磷及速效钾含量均显著高于其他扰动面(P<0.05)。复合藻液可有效诱导BSC,其土壤硬度、BSC生物量、碱性磷酸酶和土壤养分显著增加(P<0.05)。藻液、微生物菌剂和沙蒿胶的联合固沙新方法可用于工程建设扰动后BSC快速重建。扰动面类型对人工BSC的发育影响显著,阴坡更利于BSC定植和生长。

关键词: 河西走廊, 工程扰动面, 人工生物结皮, 风蚀防治, 土壤养分

Abstract:

This study investigates the effects of artificially inoculated composite algal solutions on the growth of Biological Soil Crusts (BSC) and soil properties in engineering-disturbed areas of the Hexi Corridor. In Gulang, Gansu Province, five types of disturbed surfaces (S) were simulated, and composite algal solutions (Treatments, T) were applied to observe changes in BSC growth and soil nutrients under different disturbed surfaces and treatments. The results show that BSC grew well on all disturbed surfaces, with no significant wind erosion observed. The disturbed surface (S) had a highly significant impact on BSC growth, soil nutrients, and soil enzyme activity (P<0.001). Although the treatment (T) did not show an immediate effect on BSC growth, over time, the biomass and thickness of BSC, as well as soil nutrients and soil phosphatase activity, significantly increased across all disturbed surfaces (P<0.05, 2 years). The north-facing slope of the filled embankment exhibited the fastest BSC growth rate (1.629 µg Chl a·g⁻¹, 2 years), with a 439.4% increase in BSC biomass compared to the initial three months. The BSC thickness, soil enzyme activity, available phosphorus, and potassium content were significantly higher on this slope than on other disturbed surfaces (P<0.05). The composite algal solution effectively induced BSC formation, significantly increasing soil hardness, BSC biomass, alkaline phosphatase activity, and soil nutrients (P<0.05). A new sand-fixing method combining algal solutions, microbial agents, and Artemisia sphaerocephala gum can be used for rapid BSC restoration after engineering disturbances. The type of disturbed surface significantly influences the development of artificial BSC, with north-facing slopes being more conducive to BSC colonization and growth.

Key words: Hexi Corridor, disturbed surface, artificial biological soil crusts, wind erosion prevention, soil nutrient

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