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Bulletin of Botanical Research ›› 2025, Vol. 45 ›› Issue (1): 22-33.doi: 10.7525/j.issn.1673-5102.2025.01.004

• Original Paper • Previous Articles     Next Articles

Impact of Land Use Patterns on the Structure and Function of Soil Bacterial Communities

Jun ZHI1, Wenbiao DUAN1(), Ming GAO1, Wei HU2, Meng LI2, Shuren WANG1   

  1. 1.College of Forestry,Northeast Forestry University,Harbin 150040
    2.Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Harbin 150081
  • Received:2024-11-12 Online:2025-01-20 Published:2025-01-23
  • Contact: Wenbiao DUAN E-mail:dwbiao88@163.com

Abstract:

The response of soil microbial community functions to land use changes is of key importance in the prediction of soil ecological functions. In order to clarify the effects of different land use patterns on bacterial communities in the black soil region, the soil bacterial community structure, co-occurrence network structure and functional genes in cropland, forest land and grassland in the northeastern black soil region were analyzed, respectively, and the interaction mechanisms among land use patterns, soil physicochemical properties, bacterial diversity, bacterial community structure, co-occurrence network and functional genes were explored using structural equation modelling. The results showed that there were significant differences(P<0.05) in soil physical and chemical properties and bacterial community structure among different land use patterns, and that the Shannon index and the average degree of co-occurrence network of forest land and grassland were significantly higher than that in cropland(P<0.05). The proportion of positive correlation edges of bacterial co-occurrence network in forest land was higher than that in other treatments, there was a stronger synergistic effect between soil bacteria in forest land. Functional gene results showed that different land use patterns significantly altered functional gene abundance(P<0.05). Structural equation modelling indicated that bacterial community structure had the greatest direct effect on functional genes, and land use practices had the greatest indirect effect on functional genes. In conclusion, this study further confirmed the effects of different land use patterns on bacterial communities, which provided a scientific basis for land management in the black soil area.

Key words: land use patterns, soil bacteria, co-occurrence networks, functional prediction, structural equation model

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