Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Role of maize stover incorporation on nitrogen oxide emissions in a non-irrigated Mediterranean barley field
Year:2012
Research Areas
  • Natural sciences and health sciences,
  • Agriculture
Information
Abstract
Agricultural soils in semiarid Mediterranean areas are characterized by low organic matter contents and low fertility levels. Application of crop residues and/or manures as amendments is a cost-effective and sustainable alternative to overcome this problem. However, these management practices may induce important changes in the nitrogen oxide emissions from these agroecosystems, with additional impacts on carbon dioxide emissions. In this context, a field experiment was carried out with a barley (Hordeum vulgare L.) crop under Mediterranean conditions to evaluate the effect of combining maize (Zea mays L.) residues and N fertilizer inputs (organic and/or mineral) on these emissions. Crop yield and N uptake, soil mineral N concentrations, dissolved organic carbon (DOC), denitrification capacity, N2O, NO and CO2 fluxes were measured during the growing season. The incorporation of maize stover increased N2O emissions during the experimental period by c. 15 %. Conversely, NO emissions were significantly reduced in the plots amended with crop residues. The partial substitution of urea by pig slurry reduced net N2O emissions by 46 and 39 %, with and without the incorporation of crop residues respectively. Net emissions of NO were reduced 38 and 17 % for the same treatments. Molar DOC:NO3? ratio was found to be a robust predictor of N2O and NO fluxes. The main effect of the interaction between crop residue and N fertilizer application occurred in the medium term (4?6 month after application), enhancing N2O emissions and decreasing NO emissions as consequence of residue incorporation. The substitution of urea by pig slurry can be considered a good management strategy since N2O and NO emissions were reduced by the use of the organic residue.
International
Si
JCR
Si
Title
Plant And Soil
ISBN
0032-079X
Impact factor JCR
2,733
Impact info
Datos JCR del año 2011
Volume
364
Journal number
From page
357
To page
371
Month
MARZO
Ranking
Participants
  • Autor: Diego Abalos Rodriguez (UPM)
  • Autor: Alberto Sanz Cobeña (UPM)
  • Autor: Lourdes Garcia Torres (UPM)
  • Autor: Jan Willem van Groeningen (Wageningen University)
  • Autor: Antonio Vallejo Garcia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Contaminación de agroecosistemas por las prácticas agrícolas
  • Departamento: Química y Análisis Agrícola
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