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Effect Mechanism of Land Consolidation on Soil Bacterial Community: A Case Study in Eastern China

Author

Listed:
  • Yaoben Lin

    (School of Law and Politics, Nanjing Tech University, Nanjing 211816, China)

  • Yanmei Ye

    (Land Academy for National Development (LAND), Zhejiang University, Hangzhou 310058, China)

  • Shuchang Liu

    (Land Academy for National Development (LAND), Zhejiang University, Hangzhou 310058, China)

  • Jiahao Wen

    (Department of Watershed Sciences, Utah State University, Logan, UT 84321, USA)

  • Danling Chen

    (Department of Land Management, College of Public Administration, Huazhong Agricultural University, Wuhan 430070, China)

Abstract

Farmland consolidation is an effective tool to improve farmland infrastructures, soil quality, and sustain a healthy farmland ecosystem and rural population, generating contributions to food security and regional sustainable development. Previous studies showed that farmland consolidation regulates soil physical and chemical properties. Soil microorganisms also play an important role in soil health and crop performance; however, few studies reported how farmland consolidation influence soil microecology. Here, we used DNA sequencing technology to compare bacterial community structure in farmlands with and without consolidation. DNA sequencing technology is the most advanced technology used to obtain biological information in the world, and it has been widely used in the research of soil micro-ecological environment. In September 2018, we collected soil samples in Jiashan County, Zhejiang Province, China, and used DNA sequence technology to compare the bacterial community structure in farmlands with and without consolidation. Our results found that (1) farmland consolidation had significant impacts on soil microbial characteristics, which were mainly manifested as changes in microbial biomass, microbial diversity and community structure. Farmland consolidation can increase the relative abundance of the three dominant bacteria phyla and the three fungal dominant phyla, but it also negatively affects the relative abundance of the six dominant bacteria phyla and the three fungal dominant phyla. (2) Farmland consolidation had an indirect impact on soil bacterial community structure by adjusting the soil physical and chemical properties. (3) The impact of heavy metals on bacterial community structure varied significantly under different levels of heavy metal pollution in farmland consolidation areas. There were 6, 3, 3, and 5 bacterial genera that had significant correlations with heavy metal content in cultivated land with low pollution, light pollution, medium pollution, and heavy pollution, respectively. The number of heavy metal-tolerant bacteria in the soil generally increased first and then decreased under heavy metal polluted conditions. Our study untangled the relationship between varied farmland consolidation strategies and bacteria through soil physcicochemical properties and metal pollution conditions. Our results can guide farmland consolidation strategies and sustain soil health and ecological balance in agriculture.

Suggested Citation

  • Yaoben Lin & Yanmei Ye & Shuchang Liu & Jiahao Wen & Danling Chen, 2022. "Effect Mechanism of Land Consolidation on Soil Bacterial Community: A Case Study in Eastern China," IJERPH, MDPI, vol. 19(2), pages 1-31, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:2:p:845-:d:723438
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    References listed on IDEAS

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