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Effects of Grazing Sheep and Mowing on Grassland Vegetation Community and Soil Microbial Activity under Different Levels of Nitrogen Deposition

Author

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  • Chengyang Zhou

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

  • Shining Zuo

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

  • Xiaonan Wang

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

  • Yixin Ji

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

  • Qiezhuo Lamao

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

  • Li Liu

    (Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China)

  • Ding Huang

    (College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China)

Abstract

Increasing nitrogen deposition plays a critical role in the material circulation of grassland. Mowing and grazing sheep are important means of utilizing grassland. This study investigated the effects of nitrogen deposition, sheep grazing and mowing on the soil, vegetation and soil microorganisms of grassland. N deposition increased soil inorganic nitrogen, SOM and microbial activity, and decreased soil pH, while grazing sheep and mowing had opposing effects. Compared with mowing, grazing sheep decreased the range of grass groups in the community. N deposition increased the proportion of Leymus chinensis in the community and decreased community diversity. N deposition enhanced the contribution rate of soil to the vegetation community, and reduced the effect of microorganisms on the vegetation community. In addition, N deposition significantly interacted with mowing and grazing sheep in terms of effects on soil inorganic nitrogen, soil organic matter (SOM), microbial respiration (Q), microbial mass carbon (MBC), and vegetation diversity. Therefore, appropriate N deposition in sheep grazing and mown grasslands could enhance inorganic N and organic matter, increase microbial activity, offset the adverse effects of grazing sheep and mowing, and contribute to maintaining community diversity and grassland productivity.

Suggested Citation

  • Chengyang Zhou & Shining Zuo & Xiaonan Wang & Yixin Ji & Qiezhuo Lamao & Li Liu & Ding Huang, 2022. "Effects of Grazing Sheep and Mowing on Grassland Vegetation Community and Soil Microbial Activity under Different Levels of Nitrogen Deposition," Agriculture, MDPI, vol. 12(8), pages 1-18, July.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:8:p:1133-:d:876744
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    References listed on IDEAS

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    2. Christopher M. Clark & David Tilman, 2008. "Loss of plant species after chronic low-level nitrogen deposition to prairie grasslands," Nature, Nature, vol. 451(7179), pages 712-715, February.
    3. David Tilman & Peter B. Reich & Johannes M. H. Knops, 2006. "Biodiversity and ecosystem stability in a decade-long grassland experiment," Nature, Nature, vol. 441(7093), pages 629-632, June.
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