Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Calibration of WAVE in irrigated maize: fallow vs. cover crops
Year:2013
Research Areas
  • Soil type,
  • Water pollution,
  • Ertrophication,
  • Pollution from agricultural sources,
  • Use of water,
  • Water protection,
  • Hydrology,
  • Crop production,
  • Cereal growing,
  • Engineering
Information
Abstract
Nitrate leaching decreases crop available N and increases water contamination. Replacing fallow by cover crops (CC) is an alternative to reduce nitrate contamination, because it reduces overall drainage and soil mineral N accumulation. A study of the soil N and nitrate leaching was conducted during 5 years in a semi-arid irrigated agricultural area of Central Spain. Three treatments were studied during the intercropping period of maize (Zea mays L.): barley (Hordeum vulgare L.), vetch (Vicia villosa L.), and fallow. Cover crops, sown in October, were killed by glyphosate application in March, allowing direct seeding of maize in April. All treatments were irrigated and fertilised following the same procedure. Soil water content was measured using capacity probes. Soil Nmin accumulation was determined along the soil profile before sowing and after harvesting maize. Soil analysis was conducted at six depths every 0.20m in each plot in samples from 0 to 1.2-m depth. The mechanistic water balance model WAVE was applied in order to calculate drainage and plant growth of the different treatments, and apply them to the N balance. We evaluated the water balance of this model using the daily soil water content measurements of this field trial. A new Matlab version of the model was evaluated as well. In this new version improvements were made in the solute transport module and crop module. In addition, this new version is more compatible with external modules for data processing, inverse calibration and uncertainty analysis than the previous Fortran version. The model showed that drainage during the irrigated period was minimized in all treatments, because irrigation water was adjusted to crop needs, leading to nitrate accumulation on the upper layers after maize harvest. Then, during the intercrop period, most of the nitrate leaching occurred. Cover crops usually led to a shorter drainage period, lower drainage water amount and lower nitrate leaching than the treatment with fallow. These effects resulted in larger nitrate accumulation in the upper layers of the soil after CC treatments.
International
Si
JCR
No
Title
Procedia Environmental Sciences
ISBN
1878-0296
Impact factor JCR
Impact info
Volume
19
Journal number
From page
785
To page
793
Month
JUNIO
Ranking
Participants
  • Autor: José Luis Gabriel Pérez (UPM)
  • Autor: Miguel Quemada Saenz-Badillos (UPM)
  • Autor: Joachim Vansteenkiste (Katholieke Universiteit Leuven)
  • Autor: Jan Diels (Katholieke Universiteit Leuven)
  • Autor: Marnik Vanclooster (Université catholique de Louvain)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Sistemas Agrarios (AgSystems)
  • Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM). Centro Mixto UPM-AGROMUTUA-ENESA
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