氮添加对风火山多年冻土区高寒草甸土壤微生物群落的影响

doi:10.11733/j.issn.1007-0435.2026.07.011

草地学报 ›› 2026, Vol. 34 ›› Issue (7): 2461-2471.DOI: 10.11733/j.issn.1007-0435.2026.07.011

• 研究论文 • 上一篇

氮添加对风火山多年冻土区高寒草甸土壤微生物群落的影响

许净¹, 杨世梅¹, 赵秋梅¹, 王根绪², 毛天旭³, 张涛¹

1. 贵州大学农学院, 贵州贵阳 550025;
2. 四川大学水利水电学院, 四川成都 610065;
3. 贵州大学林学院, 贵州贵阳 550025

收稿日期:2025-09-11 修回日期:2025-11-04 发布日期:2026-07-02
通讯作者: 张涛，E-mail:zhangtaoeco@outlook.com
作者简介:许净（1999-），男，苗族，贵州遵义人，硕士研究生，主要从事资源利用与植物保护研究，E-mail:jxu18785252953@163.com
基金资助:
国家自然科学基金（42061013，41701081，41701037）资助

Effects of Nitrogen Addition on Soil Microbial Community in an Alpine Meadow of the Fenghuo Mountain Permafrost Region

XU Jing¹, YANG Shi-mei¹, ZHAO Qiu-mei¹, WANG Gen-xu², MAO Tian-xu³, ZHANG Tao¹

1. College of Agriculture; Guizhou University, Guiyang, Guizhou Province 550025, China;
2. College of Water Resource and Hydropower, Sichuan University, Chengdu, Sichuan Province 610065, China;
3. College of Forestry, Guizhou University, Guiyang, Guizhou Province 550025, China

Received:2025-09-11 Revised:2025-11-04 Published:2026-07-02

摘要/Abstract

摘要： 为探究全球氮沉降加剧背景下高寒生态系统土壤微生物的响应，以青海省风火山多年冻土区高寒草甸为对象，设置0，1，3，6，9 kg·hm^-2·a^-1五个氮添加水平（记为N₀，N₁，N₃，N₆，N₉）。结果表明：与N₀处理相比，N₁与N₃处理显著提高土壤有机碳含量与碳氮比，而N₃处理显著降低土壤全氮和微生物碳含量（P<0.05）。氮添加提高了细菌变形菌门与拟杆菌门的相对丰度，但降低了真菌子囊菌门与古菌奇古菌门的丰度。N₆与N₉处理显著增加了细菌Sobs指数与Shannon指数（P<0.05）。Mantel检验显示，土壤碳氮比和全氮是影响细菌群落的关键环境因子，而微生物碳、脲酶、蔗糖酶和磷酸酶显著影响真菌群落（P<0.05）。综上，不同微生物类群对氮添加的响应存在差异，细菌群落多样性对氮添加最为敏感，而真菌和古菌群落的响应相对稳定。本研究为理解高寒生态系统中氮沉降对土壤微生物群落的影响提供了科学依据。

关键词: 氮沉降, 青藏高原, 微生物群落, 高寒草甸

Abstract: To investigate the responses of soil microorganisms in alpine ecosystems under the context of increasing global nitrogen deposition， this study was conducted in an alpine meadow located in the permafrost region of Fenghuo Mountain， Qinghai Province. Five nitrogen addition levels of 0， 1， 3， 6， and 9 kg·hm^-2·a^-1 were established（denoted as N₀， N₁， N₃， N₆， and N₉， respectively）. The results showed that compared with the N₀ treatment， the N₁ and N₃ treatments significantly increased soil organic carbon content and the soil C/N ratio， whereas the N₃ treatment significantly reduced soil total nitrogen and microbial carbon content （P<0.05）. Nitrogen addition increased the relative abundances of bacterial phyla Proteobacteria and Bacteroidota but decreased the abundances of the fungal phylum Ascomycota and the archaeal phylum Thaumarchaeota. The N₆ and N₉ treatments significantly increased the Sobs and Shannon indices of bacterial communities （P<0.05）. Mantel tests indicated that soil C/N ratio and total nitrogen were key environmental factors influencing bacterial communities， while microbial carbon content， urease， sucrase， and phosphatase activities significantly affected fungal communities （P<0.05）. In summary， different microbial groups exhibited distinct responses to nitrogen addition. The diversity of bacterial community was the most sensitive to nitrogen addition， whereas fungal and archaeal communities responded more stably. This study provides a scientific basis for understanding the effects of nitrogen deposition on soil microbial communities in alpine ecosystems.

Key words: Nitrogen deposition, Qinghai-Tibet Plateau, Microbial community, Alpine meadow

中图分类号:

S812.2

许净, 杨世梅, 赵秋梅, 王根绪, 毛天旭, 张涛. 氮添加对风火山多年冻土区高寒草甸土壤微生物群落的影响[J]. 草地学报, 2026, 34(7): 2461-2471.

XU Jing, YANG Shi-mei, ZHAO Qiu-mei, WANG Gen-xu, MAO Tian-xu, ZHANG Tao. Effects of Nitrogen Addition on Soil Microbial Community in an Alpine Meadow of the Fenghuo Mountain Permafrost Region[J]. Acta Agrestia Sinica, 2026, 34(7): 2461-2471.

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氮添加对风火山多年冻土区高寒草甸土壤微生物群落的影响

Effects of Nitrogen Addition on Soil Microbial Community in an Alpine Meadow of the Fenghuo Mountain Permafrost Region

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