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Bioremediation00:46

Bioremediation

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The Soil Ecosystem02:23

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  5. Environmental Sciences
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  9. Soil Physics
  11. Biochar And Bentonite Application Improves Aeolian Sandy Soil Health And Enhances Soil Carbon Sequestration And Emission Reduction Potential

Biochar and bentonite application improves aeolian sandy soil health and enhances soil carbon sequestration and emission reduction potential

Liang Weijing1,2, Tang Jiaxi3,4,5, Li Yu1,2

  • 1Ordos Institute of Liaoning Technical University, Ordos, China.

Scientific Reports
|January 17, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Improving barren aeolian sandy soil with biochar and bentonite enhances water retention and nutrient availability. This soil amendment significantly boosts corn yield and offers substantial carbon sequestration potential.

Area of Science:

  • Soil Science
  • Agronomy
  • Environmental Science

Background:

  • Aeolian sandy soils exhibit poor fertility, low water/fertilizer retention, and reduced crop yields.
  • Improving soil physicochemical and biological properties is crucial for sustainable agriculture in these environments.

Purpose of the Study:

  • To evaluate the effects of biochar and bentonite amendments on aeolian sandy soil characteristics.
  • To assess the impact of these amendments on corn agronomic traits and yield.
  • To explore the carbon sequestration and emission reduction potential of biochar in sandy soils.

Main Methods:

  • A 2-year field experiment using rice husk, corn stalk, and bamboo charcoal biochar, plus bentonite as soil amendments.
  • Analysis of soil physicochemical properties (water content, bulk density, aggregate stability, organic matter, pH, CEC).
Keywords:
Aeolian sandy soilBentoniteBiocharBiological properties

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  • Measurement of soil biological indicators (enzyme activities, microbial carbon) and corn agronomic traits (plant height, yield).

    • Main Results:

    • Biochar and bentonite amendments improved soil water content, reduced bulk density, and increased soil organic matter, pH, and CEC (up to 150.4%).
    • Corn stalk biochar combined with bentonite significantly enhanced aggregate stability and nutrient availability (available P increased 2.6x, N increased 211.5%).
    • Corn yield increased by 36.6% with optimal amendment application; microbial carbon content increased 2.4x, indicating enhanced soil biological activity.

    Conclusions:

    • Biochar and bentonite are effective amendments for improving the quality and productivity of aeolian sandy soils.
    • Corn stalk biochar shows significant potential for enhancing soil health and crop yields, alongside considerable carbon sequestration benefits.
    • The application of these amendments offers a sustainable approach to mitigate CO2 emissions, equivalent to offsetting ~100 million tons annually.
    Carbon sequestration and emission reduction
    Physicochemical properties