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  1. Home
  3. Research Domains
  5. Environmental Sciences
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  11. Understanding How Management Can Prevent Degradation Of The Structurally Fragile Soils Of The Amazonian Periphery.
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  11. Understanding How Management Can Prevent Degradation Of The Structurally Fragile Soils Of The Amazonian Periphery.

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Understanding how management can prevent degradation of the structurally fragile soils of the Amazonian periphery.

Jéssica de Freitas Nunes1, Lorena Silva Campos1, Alana das Chagas Ferreira Aguiar2

  • 1Postgraduate Program in Agroecology, Maranhão State University, São Luis, Maranhão 65000-000, Brazil.

European Journal of Agronomy : the Journal of the European Society for Agronomy
|February 2, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Long-term and short-term mulching with leguminous biomass improves tropical soil fertility and maize yield. Combining mulching with calcium and nitrogen boosts soil organic carbon and reduces land degradation in Amazonian conditions.

Keywords:
Base cations retentionSoil organic carbon stabilizationSustainabilityTropical agrosystem

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Area of Science:

  • Agricultural Science
  • Soil Science
  • Tropical Ecology

Background:

  • Mulching management's impact on tropical agroecosystem sustainability is not well understood.
  • Leguminous biomass mulching effects on calcium-rich tropical soils require further investigation.

Purpose of the Study:

  • To evaluate and differentiate the short-term and long-term effects of leguminous biomass mulching on tropical soil fertility.
  • To assess the combined impact of mulching, calcium, and synthetic nitrogen on soil properties and crop yield.

Main Methods:

  • Experimental treatments included long-term mulching (LTM), short-term mulching (STM), combined LTM and STM, and additions of synthetic nitrogen (sN).
  • Soil properties such as total soil organic carbon (SOC) and base saturation (BS) were measured.
  • Maize (Zea mays) N uptake and grain yield were quantified.

    • Main Results:

    • Long-term mulching (LTM) increased total SOC and BS through interactions with biomass, synthetic nitrogen (sN), and calcium (Ca).
    • Short-term mulching (STM) improved soil moisture, reduced soil penetration resistance, and enhanced nitrogen uptake, potentially replacing sN.
    • Combined mulching strategies significantly increased accumulated N by maize (163%) and grain yield (125%) compared to unmulched controls with sN.

    Conclusions:

    • Continuous leguminous biomass mulching, combined with calcium and synthetic nitrogen, prevents agricultural land degradation in Amazonian conditions.
    • This integrated approach is recommended for sustainable Amazonian soil management, mitigating deforestation risks.
    • Mulching strategies offer a viable alternative to synthetic nitrogen for enhancing maize nutrition and yield.