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Effects of Land Reclamation on Soil Bacterial Community and Potential Functions in Bauxite Mining Area

Author

Listed:
  • Xuesong Li

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Zhenjiang Jin

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
    Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
    Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China)

  • Liyuan Xiong

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Lingchen Tong

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Hongying Zhu

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Xiaowen Zhang

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

  • Guangfa Qin

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China)

Abstract

Studying the characteristics of microorganisms in mine reclamation sites can provide a scientific reference basis for mine land reclamation. Soils in the plough layer (0–20 cm) of the bauxite mine plots in Pingguo city, Guangxi Zhuang Autonomous Region, China, with different reclamation years were used as the research objects. The community structure of soil bacteria was analyzed with high-throughput sequencing technology. The results show the following: (1) Reclamation significantly increased the contents of soil nutrients ( p < 0.05). (2) The relative abundances of Proteobacteria were high (22.90~41.56%) in all plots, and reclamation significantly reduced the relative abundances of Firmicutes (3.42–10.77%) compared to that in the control plot (24.74%) ( p < 0.05). The relative abundances of α-proteobacteria generally increased while the reclamation year increased. The relative abundances of α-proteobacteria and γ-proteobacteria showed significant positive correlations with soil carbon, nitrogen, and phosphorus nutrients ( p < 0.01). The relative abundance of Acidobacteria Group 6 showed significant positive correlations with soil exchangeable Ca and Mg ( p < 0.01). (3) Bacterial co-occurrence network showed more Copresence interactions in all plots (50.81–58.39%). The reclaimed plots had more nodes, higher modularity, and longer characteristic path length than the control plot, and the keystone taxa changed in different plots. (4) The chemoheterotrophy and aerobic chemoheterotrophy were the most abundant functional groups in all plots (35.66–48.26%), while reclamation reduced the relative abundance of fermentation groups (1.75–11.21%). The above findings indicated that reclamation improved soil nutrients, changed the bacterial community structure and potential functions, and accelerated the microbial stabilization of the reclaimed soil.

Suggested Citation

  • Xuesong Li & Zhenjiang Jin & Liyuan Xiong & Lingchen Tong & Hongying Zhu & Xiaowen Zhang & Guangfa Qin, 2022. "Effects of Land Reclamation on Soil Bacterial Community and Potential Functions in Bauxite Mining Area," IJERPH, MDPI, vol. 19(24), pages 1-17, December.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:24:p:16921-:d:1005475
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    References listed on IDEAS

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    1. Shan, Linan & He, Yunfeng & Chen, Jie & Huang, Qian & Lian, Xu & Wang, Hongcai & Liu, Yili, 2015. "Nitrogen surface runoff losses from a Chinese cabbage field under different nitrogen treatments in the Taihu Lake Basin, China," Agricultural Water Management, Elsevier, vol. 159(C), pages 255-263.
    2. Lijia Zhang & Zhenqi Hu & Dazhi Yang & Huanhuan Li & Bo Liu & He Gao & Congjie Cao & Yan Zhou & Junfang Li & Shuchang Li, 2022. "Land Use Dynamic Evolution and Driving Factors of Typical Open-Pit Coal Mines in Inner Mongolia," IJERPH, MDPI, vol. 19(15), pages 1-14, August.
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