Nitrogen oxides emission related to urea broadcasting fertilization under conventional and no-tillage systems

Authors

  • Arminda Moreira de Carvalho
  • Mercedes Maria da Cunha Bustamante
  • Alessandra Rodrigues Kozovits
  • Leo Nobre de Miranda
  • Lúcio José Vivaldi
  • Danielle Matias de Sousa

DOI:

https://doi.org/10.1590/S1678-3921.pab2006.v41.7192

Keywords:

nitric oxide, nitrous oxide, nitrogen fertilization, cover crops, irrigation, Cerrado

Abstract

The objective of this work was to evaluate the NO and N2O emissions up to five days after the first nitrogen broadcasting fertilization with urea in a cornfield, in a Red Latosol, under conventional and no-tillage systems. The level of nitrogen broadcasting fertilization was of 60 kg ha-1. The experiment was conducted at Embrapa Cerrados, Planaltina, DF, Brazil, in a randomized block design, with three replications, beeing the third corn crop in rotation with soybean. NO and N2O fluxes were measured using PVC chambers installed in each plot. Higher NO fluxes were found immediately after (5.4 ng N cm-2 h-1) and three days (4.8 ng N cm-2 h-1) after N fertilization and irrigation. In the first day after fertilization, the NO emission decreased significantly to 1.9 ng N cm-2 h-1, and after five days, reached 1.2 ng N cm-2 h-1. N2O fluxes values were below the detection limit of 0.6 ng N cm-2 h-1. No significant differences in nitrogen oxides fluxes were found between plots under conventional and no-tillage systems.

Published

2006-04-01

How to Cite

Carvalho, A. M. de, Bustamante, M. M. da C., Kozovits, A. R., Miranda, L. N. de, Vivaldi, L. J., & Sousa, D. M. de. (2006). Nitrogen oxides emission related to urea broadcasting fertilization under conventional and no-tillage systems. Pesquisa Agropecuaria Brasileira, 41(4), 679–685. https://doi.org/10.1590/S1678-3921.pab2006.v41.7192

Issue

Section

SOIL SCIENCE