Citation Information

  • Title : Soil nitrous oxide fluxes following cover crops management under tillage and no tillage in south Brazil.
  • Source : Proceedings of the 19th World Congress of Soil Science: Soil solutions for a changing world, Brisbane, Australia, 1-6 August 2010. Congress Symposium 4: Greenhouse gases from soils
  • Publisher : International Union of Soil Sciences (IUSS)
  • Pages : 232-234
  • Year : 2010
  • Document Type : Journal Article
  • Language : English
  • Authors:
    • Vieira, F.
    • Bayer, C.
    • Zanatta, J.
  • Climates: Humid subtropical (Cwa, Cfa).
  • Cropping Systems: Cover cropping. No-till cropping systems. Oats. Till cropping systems.
  • Countries: Brazil.

Summary

Emissions of N 2O were measured following cover crops management (oat - O and vetch - V) under tillage (CT) and no tillage (NT) in a silt loam Acrisol in South Brazil. Effects of tillage systems and residue management on N 2O emissions were examined over 55 days in 2007 and 54 days in 2008. Larger emissions were measured in 2008 compared to 2007. N 2O emissions increased in the presence of crops residues and were further increased in NT V/M in 2007 (19384 g N/m 2/ha) and in CT V/M in 2008 (431138 g N/m 2/ha) and they are related to high water content and available soil nitrogen. Smallest fluxes of N 2O were measured from the NT O/M treatments, which 28861 g N/m 2/ha in 2007 and 27419 g N/m 2/ha in 2008.

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