草地学报 ›› 2025, Vol. 33 ›› Issue (11): 3593-3602.DOI: 10.11733/j.issn.1007-0435.2025.11.011

• 研究论文 • 上一篇    

施肥对‘巴青’垂穗披碱草草地土壤真菌群落的影响

雷变霞1, 苗彦军2, 郑少龙3, 王传旗1, 王明涛1   

  1. 1. 甘肃林业职业技术大学, 甘肃 天水 741020;
    2. 西藏农牧学院, 西藏 林芝 860000;
    3. 内蒙古通辽市奈曼旗林业和草原局, 内蒙古 通辽 028300
  • 收稿日期:2024-11-26 修回日期:2024-12-24 发布日期:2025-11-13
  • 通讯作者: 王明涛,E-mail:wmt060708@126.com
  • 作者简介:雷变霞(1990-),女,汉族,甘肃定西人,硕士研究生,主要从事牧草及饲料作物栽培方面的研究,E-mail:Wlbx1990@126.com;
  • 基金资助:
    甘肃省教育厅:高校教师创新基金项目(2024B-254、2024B-261);甘肃省青年人才团队项目(2025QNTD14)资助

Effect of Fertilization on Soil Fungal Community of Elymus nutans ‘Baqing’ Grassland

LEI Bian-xia1, MIAO Yan-jun2, ZHENG Shao-long3, WANG Chuan-qi1, WANG Ming-tao1   

  1. 1. Gansu Forestry Voctech University, Tianshui, Gansu Province 741020, China;
    2. Xizang Agriculture and Animal Husbandry University, Nyingchi, Xizang 860000, China;
    3. Naiman Banner Forestry and Grassland Bureau of Tongliao City, Tongliao Inner Mongolia 028300, China
  • Received:2024-11-26 Revised:2024-12-24 Published:2025-11-13

摘要: 探究施肥对乡土植物土壤真菌群落的影响,为高寒地区野生牧草种质资源的合理栽培和繁育提供理论依据。本研究以‘巴青’垂穗披碱草(Elymus nutans ‘Baqing’)草地的土壤真菌群落为研究对象,分析不同施肥处理[对照(N0P0K0)、缺素区(N0P2K2、N2P0K2、N2P2K0)、全肥区(N2P2K2)]对土壤真菌群落的影响。结果表明:施肥后N2P2K0处理独有扩增子序列变异体(ASVs)数量有升高的趋势。相比对照,全肥区真菌群落的香农多样性指数和均匀度指数显著下降(P<0.05)。缺素区N2P2K0处理丰富度指数和香农多样性指数显著高于全肥区(P<0.05)。土壤速效氮(P<0.05)和土壤pH(P<0.01)是群落门水平物种变化的显著影响因子;属水平物种变化的显著影响因子为土壤速效磷(P<0.05)。共现网络分析显示,9个关键节点ASVs分别隶属于子囊菌门(5个)、担子菌门(3个)和被孢霉门(1个)。综上所述,全肥区显著降低了真菌群落的香农多样性和均匀度指数,相较全肥区对真菌群落多样性的影响,氮磷共施更有利于丰富度和香农多样性指数提升。关注共现网络中的关键节点菌属对进一步研究土壤真菌群落组装过程及其功能预测具有指导意义。

关键词: 栽培草地, 土壤养分, 微生物群落多样性, 冗余分析, 共现网络

Abstract: To explore the effect of fertilization on soil fungal community of native plants, and to provide theoretical basis rational cultivation and breeding of wild forage germplasm resources in alpine region, we conducted a comprehensive analysis of fungal communities under different treatments: control (N0P0K0), nutrient-deficient zones (N0P2K2, N2P0K2, N2P2K0), and full fertilization zone (N2P2K2) using Elymus nutans ‘Baqing’ grassland soil as the research subject, The results showed that the number of unique amplicon sequence variants (ASVs) in N2P2K0 treatment increased after fertilization. The fertilizer-rich zone exhibited significantly reduced Shannon (P<0.05) and Pielou evenness indices (P<0.05) relative to control. Notably, N2P2K0 treatment showed significantly higher richness and Shannon diversity than fertilizer-rich zone (P<0.05). Soil available nitrogen (P<0.05) and soil pH (P<0.01) significantly affected species change at phylum level, and soil available phosphorus was a significant factor influencing species change at genus level (P<0.05). Co-occurrence network analysis identified 9 keystone ASV nodes distributing across Ascomycota (5), Basidiomycota (3), and Mortierellomycota (1). In conclusion, the fertilizer-rich zone significantly reduced the Shannon diversity and Pielou evenness indices of fungal communities. Compared to the fertilizer-rich zone, the combined nitrogen-phosphorus application demonstrated greater efficacy in enhancing species richness and Shannon diversity index. The identified keystone taxa provide critical insights for understanding fungal community assembly mechanisms and functional prediction in alpine ecosystems.

Key words: Cultivated grassland, Soil nutrients, Microbial community diversity, Redundancy analysis, Co-occurrence network

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