Silicon Fertilizer Boosts Potato Yields, Reduces Greenhouse Gas Emissions Under Drought Conditions

Strategic Insights -

Silicon fertilization has been shown to enhance drought tolerance and increase potato yields, while also reducing greenhouse gas emissions in Danish soils. A recent study conducted by researchers at Aarhus University found that silicon fertilizers reduced cumulative nitrous oxide (N2O) emissions by an average of 31% compared to control plots. The study, published in Scientific Reports, examined the effects of silicon fertilization on potato yields and N2O emissions under drought stress on two different soils in Denmark.

Key Takeaways:

  • Silicon fertilization increased potato yields by 10-15% in both soils, with amorphous silica (ASi) and diatomaceous earth (DE) resulting in higher yields compared to the control.
  • Drought stress had a significant impact on potato yields, with acute drought (AD) treatments producing higher yields than severe drought (SD) treatments.
  • Silicon fertilizers reduced cumulative N2O emissions by 31% in both soils, likely due to altered denitrification processes.
  • The study suggests that silicon fertilization could be a sustainable solution for maintaining potato production while reducing agricultural NO emissions under drought stress in Denmark.
  • The research highlights the potential for silicon fertilization to improve crop resilience and reduce greenhouse gas emissions in agricultural systems.

Statistics:

  • 31% average reduction in cumulative N2O emissions in both soils due to silicon fertilizers.
  • 10-15% increase in potato yields in both soils due to silicon fertilizers.
  • 2 soils examined in the study: Orthic haplohumod-sand and Typical agrudalf-clay.
  • 2 drought intensities examined: acute drought (AD) and severe drought (SD).
  • 3 types of silicon fertilizers examined: amorphous silica (ASi), diatomaceous earth (DE), and no-si addition (control).

Sources:

  • "Silicon fertilizer increased potato drought tolerance and reduced soil N2O emissions in two Danish soils at field scale." Scientific Reports, 2025;15(1):36111.