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February 2, 2026Soil Use and ManagementOpen Access

Responses of Soil Organic Carbon and Its Physical Fractions to Ecological Restoration in the Karst Area of Southwest China

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Authors

XSXizao SunSouthwest UniversityWHWen HeSouthwest UniversityNGNan GaoNanjing Tech University

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Implication

Demonstrates changes in soil organic carbon fractions in karst areas, indicating ecological improvement.

Key Points

  • This research aims to examine how ecological restoration influences the contents of soil organic carbon and its physical fractions in karst regions.
  • Collected soil samples from various land uses: secondary forest, osmanthus forest, paddy field, and dryland.
  • Measured total organic carbon and its fractions using potassium dichromate oxidation and ferrous sulfate titration.
  • Analyzed changes in soil carbon content linked to ecological restoration efforts.
  • SOC content increased significantly due to restoration, enhancing biomass and improving soil structure.
  • Labile carbon in paddy fields rose by 19.49% and recalcitrant carbon by 89.14%.
  • MAOC increased by 38.68% and 57.52%, signifying enhanced carbon stability.
  • Contribution of the particulate fraction to SOC rose significantly compared to dryland.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/6980fc17c1c9540dea80de08https://doi.org/10.1111/sum.70174
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