干旱区研究2026，Vol.43Issue(8)：1644-1654,11.DOI:10.13866/j.azr.2026.08.07
毛乌素沙地林药间作对根际土壤微生物群落结构的影响
Effects of forest-medicinal plant intercropping on rhizosphere soil microbial community structure in the Mu Us Sandy Land
摘要
Abstract
The popularization of forest-medicinal herb intercropping in the Mu Us Sandy Land serves as a vital means to synergistically enhance ecological and economic benefits.In this study,a field experiment was conduct-ed in 2021 at Daquan Forest Farm(Lingwu,China)located on the southwestern edge of the Mu Us Sandy Land.Three intercropping treatments were established,namely,Amygdalus pedunculata intercropped with Stellaria di-chotoma var.lanceolata(PR),Lonicera japonica,and Scutellaria baicalensis,with monocropped Amygdalus pe-dunculata set as the control.In 2023,the soil pH and nutrient contents under different treatments were systemati-cally determined,and high-throughput sequencing technology was used to analyze the community structure of rhi-zosphere soil microorganisms.Firstly,intercropping patterns exerted a significant effect on soil pH and nutrient contents.Specifically,the contents of total nitrogen(333.67 mg·kg-1)and soil organic matter(5.94 g·kg-1)under PR treatment was increased by 80.9%and 75.7%,respectively,compared with the PP treatment,with the lowest pH value(8.57).Secondly,the number of bacterial operational taxonomic units in the rhizosphere soil under PR treatment was the highest(3435),and its fungal Abundance-based Coverage Estimator index(656.31)and Chao1 index(654.14)were significantly higher than those recorded under other treatments(P<0.05).Thirdly,regarding microbial community composition,the PR pattern increased the relative abundance of beneficial taxa,including Actinobacteriota,Chloroflexi,and Mortierellomycota,while reducing the proportion of pathogenic genera such as Fusarium.Fourthly,Pearson correlation and redundancy analysis revealed that total nitrogen,organic matter,and available potassium were key factors affecting the fungal community,while available phosphorus and pH influ-enced the structure and diversity of the bacterial community.In conclusion,PR treatment may significantly im-prove soil chemical properties and optimize the microbial community structure;hence,it may be a suitable forest-medicinal intercropping pattern for popularization in the Mu Us Sandy Land.关键词
毛乌素沙地/长柄扁桃/林药间作/土壤养分/微生物群落Key words
Mu Us Sandy Land/Amygdalus pedunculata/forest-medicinal plant intercropping/soil nutrients/microbial community引用本文复制引用
苟莉,王瑞霞,包玉国,朱林..毛乌素沙地林药间作对根际土壤微生物群落结构的影响[J].干旱区研究,2026,43(8):1644-1654,11.基金项目
宁夏回族自治区重点研发计划项目(2022BEG02012,2026BEG01003) （2022BEG02012,2026BEG01003）
