干旱区研究2025，Vol.42Issue(3)：467-479,13.DOI:10.13866/j.azr.2025.03.07
土壤微生物群落对放牧的响应及其与环境因子的关系
Responses of soil microbial communities to grazing and their relationship with environmental factors
摘要
Abstract
To explore the differences in the responses of different soil microbial community characteristics to grazing intensity,grasslands with different grazing intensities in the middle section of the northern slopes of Tian-shan Mountains were selected as a focus for this study.Combining field investigation and indoor analysis,the changing patterns of soil microbial community characteristics with grazing intensity and their intrinsic correlation with soil factors were analyzed.The results showed that Actinobacteria and Ascomycota were the dominant phyla of bacteria and fungi,respectively.Compared with the findings upon heavy grazing,light grazing significantly in-creased the alpha diversity of microbial communities(P<0.05)and promoted the accumulation of soil microbial biomass carbon,nitrogen,and phosphorus contents.Redundancy analysis and Mantel test showed that the soil mi-crobial community characteristics were positively correlated with the soil total nitrogen and negatively correlated with the soil bulk density(P<0.05).Furthermore,the structural equation model showed that grazing negatively impacted the microbial diversity,richness,biomass,and OTUs characteristics by increasing the bulk density and reducing the soil nutrients(P<0.05).Compared with other indicators,soil microbial community diversity was more sensitive to grazing.In summary,light grazing is conducive to improving the microbial community,and rea-sonable regulation of grazing intensity is a feasible strategy to ensure the stable development of microbial commu-nities.关键词
放牧强度/土壤真菌/土壤细菌/环境因素/天山北坡Key words
grazing intensity/soil fungi/soil bacteria/environmental factor/northern slopes of Tianshan Moun-tains引用本文复制引用
江康威,王亚菲,刘晨通,李宏,吕程,吐尔逊娜依·热依木,张青青..土壤微生物群落对放牧的响应及其与环境因子的关系[J].干旱区研究,2025,42(3):467-479,13.基金项目
国家自然科学基金项目(2522GZRJJ,31960338,41561103)和东北师范大学植被生态科学教育部重点实验室开放项目(130026533)资助 （2522GZRJJ,31960338,41561103）
