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Dairy Slurry Application to Stubble-Covered Soil: A Study on Sustainable Alternatives to Minimize Gaseous Emissions

Author

Listed:
  • Arejacy Antonio Silva

    (Instituto Federal de Educação, Ciência e Tecnologia de São Paulo, Rua Professor Celso F. Silva, 1333, Avare 18707-150, Brazil
    LEAF-Linking Landscape, Environment, Agriculture and Food Research Centre, TERRA Associated Laboratory, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal)

  • Mário Carvalho

    (MED, Universidade de Evora, 7000-849 Evora, Portugal)

  • João Coutinho

    (Centro de Química, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugal)

  • Ernesto Vasconcelos

    (LEAF-Linking Landscape, Environment, Agriculture and Food Research Centre, TERRA Associated Laboratory, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal)

  • David Fangueiro

    (LEAF-Linking Landscape, Environment, Agriculture and Food Research Centre, TERRA Associated Laboratory, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal)

Abstract

The development of sustainable application practices, which do not demand incorporation into the soil, is necessary to encourage slurry use in conservation agriculture (CA). Incorporation is the most common practice to reduce nitrogen losses from the applied slurry. However, in CA, soil disturbance must be avoided. Two experiments were conducted to evaluate strategies to reduce gaseous emissions from dairy slurry applied to stubble-covered soil without incorporation. We evaluated (1) effects on ammonia (NH 3 ) emissions of pretreatment by acidification (ADS), irrigation (IR) and placement under the stubble (US); and (2) effects of ADS, IR, US and delayed fertilization (RDS T16) on greenhouse gases (GHG). The results of the evaluated strategies were compared to raw slurry (RDS) and ammonium sulphate (MS). Additionally, in experiment 2, the results were compared to ammonium sulphate (MB) and slurry injection (IN), both in bare soil. ADS, US and IR decreased NH 3 emissions by 66%, 60% and 32.5%, respectively, with total N emissions NH 3 emissions accounting for more than 79% of N losses in slurry-based treatments. Late application reduced N 2 O emissions by 48%. GHG emissions from ADS, US and IR were similar to those from MS, MB and IN. ADS, US and IR are the most suitable strategies for slurry application in CA.

Suggested Citation

  • Arejacy Antonio Silva & Mário Carvalho & João Coutinho & Ernesto Vasconcelos & David Fangueiro, 2022. "Dairy Slurry Application to Stubble-Covered Soil: A Study on Sustainable Alternatives to Minimize Gaseous Emissions," Agriculture, MDPI, vol. 12(7), pages 1-16, July.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:7:p:1021-:d:862431
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    References listed on IDEAS

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    1. David Fangueiro & Paula Alvarenga & Rita Fragoso, 2021. "Horticulture and Orchards as New Markets for Manure Valorisation with Less Environmental Impacts," Sustainability, MDPI, vol. 13(3), pages 1-28, January.
    2. Michler, Jeffrey D. & Baylis, Kathy & Arends-Kuenning, Mary & Mazvimavi, Kizito, 2019. "Conservation agriculture and climate resilience," Journal of Environmental Economics and Management, Elsevier, vol. 93(C), pages 148-169.
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    4. Christian Wagner & Tavs Nyord & Annette Vibeke Vestergaard & Sasha Daniel Hafner & Andreas Siegfried Pacholski, 2021. "Acidification Effects on In Situ Ammonia Emissions and Cereal Yields Depending on Slurry Type and Application Method," Agriculture, MDPI, vol. 11(11), pages 1-20, October.
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