草地学报 ›› 2025, Vol. 33 ›› Issue (6): 1764-1770.DOI: 10.11733/j.issn.1007-0435.2025.06.006

• 研究论文 • 上一篇    

不同放牧强度对内蒙古荒漠草原土壤细菌群落的影响

周慧敏1, 高志伟1, 张晓嘉1, 吴佳芯1, 王伟峰2, 韩国栋1   

  1. 1. 内蒙古农业大学草业学院/内蒙古农业大学草地资源教育部重点实验室, 内蒙古 呼和浩特 010011;
    2. 内蒙古自治区林业科学研究院, 内蒙古 呼和浩特 010010
  • 收稿日期:2024-08-19 修回日期:2024-10-08 发布日期:2025-06-13
  • 通讯作者: 韩国栋,E-mail:hanguodong@imau.edu.cn
  • 作者简介:周慧敏(1997-),女,汉族,内蒙古呼和浩特人,硕士研究生,主要从事土壤微生物研究,E-mail:15661119961@163.com
  • 基金资助:
    内蒙古自治区林草局揭榜挂帅项目“草原保护与可持续管理碳汇方法学研发与应用”(2024LKY-TH02);以铸牢中华民族共同体意识为工作主线推进内蒙古生态文明建设研究(ZLJD24034)资助

Effects of Different Grazing Intensity on Soil Bacterial Community in Inner Mongolian Desert Grasslands

ZHOU Hui-min1, GAO Zhi-wei1, ZHANG Xiao-jia1, WU Jia-xin1, WANG Wei-feng2, HAN Guo-dong1   

  1. 1. College of Grassland Science, Inner Mongolia Agricultural University, Key Laboratory of Grassland Resources, Ministry of Education of China, Hohhot, Inner Mongolia 010011, China;
    2. Inner Mongolia Autonomous Region Forestry Scientific Research Institute, Hohhot, Inner Mongolia 010010, China
  • Received:2024-08-19 Revised:2024-10-08 Published:2025-06-13

摘要: 研究内蒙古荒漠草原土壤细菌群落对不同放牧强度的响应,为荒漠草原的生态保护和恢复提供科学、理论和技术支持。以内蒙古短花针茅(Stipa breviflora)荒漠草原为研究对象,研究了不同放牧强度(不放牧、轻度放牧、中度放牧、重度放牧)对土壤理化性质以及土壤细菌群落组成和多样性的影响,分析了土壤理化性质与土壤细菌群落的相互作用。结果表明:与不放牧相比,重度放牧降低了内蒙古荒漠草原土壤的全氮、硝态氮、铵态氮、速效磷含量及土壤湿度。轻度放牧降低了芽单胞菌门的丰度。随放牧强度的增加,土壤细菌的优势门无变化,α-多样性无变化。轻度放牧改变了细菌β-多样性。研究结果有助于理解土壤微生物的生态敏感性,为实现荒漠草原生态系统的可持续管理提供科学指导。

关键词: 荒漠草原, 放牧强度, 细菌群落, 土壤理化性质

Abstract: To study the response of soil bacterial community to different grazing intensities in Inner Mongolia desert grassland, and to provide scientific, theoretical and technical support for the ecological protection and restoration of desert grassland. Taking the Stipa breviflora desert grassland in Inner Mongolia as the research object, the effects of different grazing intensities (no grazing, light grazing, medium grazing and heavy grazing) on soil physicochemical properties as well as the composition and diversity of soil bacterial communities were studied, and the interactions between soil physicochemical properties and soil bacterial communities were analyzed. The results showed that heavy grazing reduced total nitrogen content, nitrate nitrogen content, ammonium nitrogen content, available phosphorus content and soil moisture of Inner Mongolian desert grassland soils compared with no grazing. Light grazing reduced the abundance of Gemmatomonadota. There was no change in the dominant phylum of soil bacteria and no change in α-diversity with increasing grazing intensity. Light grazing changed the bacterial β-diversity. The results of the study can help to understand the ecological sensitivity of soil microorganisms and provide scientific guidance for achieving sustainable management of desert grassland ecosystems.

Key words: Desert grassland, Grazing intensity, Bacterial community, Soil physicochemical properties

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