Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (2): 351-363.DOI: 10.3969/j.issn.1004-1524.20250154

• Environmental Science • Previous Articles     Next Articles

Effects of intercropping with soybean and alfalfa on the rhizosphere soil microbial community structure of Paeonia rockii

YANG Yushan1(), ZHANG Miaomiao1, LYU Zengwei2, CHEN Xue1, HUANG Qiuliang1, LIU Haoyang1, CAO Minghui1, HUANG Zhenbei1, ZHANG Guofang1,*()   

  1. 1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    2. Institute of Forestry and Grassland Science, Liangshan Yi Autonomous Prefecture, Xichang 615050, Sichuan, China
  • Received:2025-03-06 Online:2026-02-25 Published:2026-03-24

Abstract:

This study aimed to investigate the effects of monocropping of Paeonia rockii and its intercropping with Glycine max and Medicago sativa L., respectively, on the rhizosphere soil microbial community structure, providing a theoretical basis for optimizing the ecological planting patterns of P. rockii. Using P. rockii monoculture as the control, treatments of P. rockii-G. max intercropping and P. rockii-M. sativa intercropping were established. Rhizosphere soil samples were collected, and high-throughput sequencing technology was used to analyze the composition and diversity of bacterial and fungal communities. The results indicated that, with the exception of available potassium, intercropping with soybean or alfalfa had no significant effect on soil available nutrient content but altered the rhizosphere microbial community structure. Intercropping with alfalfa increased the richness of bacterial communities, intercropping with soybean had no significant effect on the richness and diversity of fungal communities. Additionally, intercropping with soybeam increased the relative abundance of beneficial microbial groups such as Proteobacteria, Actinobacteriota, and Basidiomycota, and reduced the relative abundance of the pathogenic fungus Fusarium. In conclusion, intercropping of P. rockii helped enhance the abundance of beneficial rhizosphere microbes and suppressed pathogen enrichment. Intercropping with soybean showed greater advantages in improving the fungal community structure, making it more conducive to improving the rhizosphere soil micro-ecological environment of P. rockii.

Key words: Paeonia rockii, intercropping, rhizosphere soil, microbial community, richness, diversity

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