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Nitrogen and Carbon Mineralization from Organic Amendments and Fertilizers Using Incubations with Sandy Soils

Author

Listed:
  • Cristina Gil

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA
    Current address: Indian River Research and Education Center, University of Florida, Fort Pierce, FL 34945-3138, USA.)

  • Kaitlyn Tucker

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA
    Current address: School of Forest, Fisheries, & Geomatics Sciences & School of Natural Resources and Environment, University of Florida, Gainesville, FL 32611, USA.)

  • Samantha Victores

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA
    Current address: Quality Certification Services, Gainesville, FL 32611, USA.)

  • Yang Lin

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA)

  • Thomas Obreza

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA)

  • Gabriel Maltais-Landry

    (Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL 32611, USA)

Abstract

Synthetic fertilizers are the main nitrogen (N) input used in specialty crop systems established on sandy soils of Florida, although organic amendments and fertilizers can be used as a substitute. Organic N contained in these products must be mineralized before crop uptake, which is affected by amendment properties, soil properties, and temperature. A better method for predicting N release can help maximize the nutrient cycling benefits of organic amendments and fertilizers while avoiding negative environmental impacts. The main objective of this study was to measure N release and CO 2 emissions from two poultry manure-based amendments (PMA) and two processed organic fertilizers (OF) made from livestock byproducts (e.g., feather meal). We conducted an 8-week incubation using two sandy Florida soils belonging to two soil orders (Entisol and Spodosol) and with a greater than two-fold difference in soil organic C. We incubated these soils at 10 °C, 17 °C, 24 °C, and 30 °C, measured plant-available N at 0, 1, 4, and 8 weeks, and measured CO 2 emissions weekly. In both soils, OF released more inorganic N and at a faster rate compared with PMA, but CO 2 emissions were greater from PMA than OF. Nitrogen mineralization and CO 2 emissions increased with temperature, but temperature effects were less important than expected. These results on the mineralization of PMA and OF in sandy soils are key to optimize their use and management in Florida and other areas dominated by sandy soils.

Suggested Citation

  • Cristina Gil & Kaitlyn Tucker & Samantha Victores & Yang Lin & Thomas Obreza & Gabriel Maltais-Landry, 2024. "Nitrogen and Carbon Mineralization from Organic Amendments and Fertilizers Using Incubations with Sandy Soils," Agriculture, MDPI, vol. 14(11), pages 1-16, November.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:11:p:2009-:d:1516919
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    References listed on IDEAS

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    1. Andrzej Cezary Żołnowski & Tadeusz Bakuła & Elżbieta Rolka & Andrzej Klasa, 2022. "Effect of Mineral–Microbial Deodorizing Preparation on the Value of Poultry Manure as Soil Amendment," IJERPH, MDPI, vol. 19(24), pages 1-17, December.
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