Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Water and nitrogen footprint in an irrigated crop under mineral and organic fertilization
Year:2014
Research Areas
  • Agriculture
Information
Abstract
In order to establish rational nitrogen (N) application and reduce groundwater contamination, a clearer understanding of the N distribution through the growing season and its balance is crucial. Excessive doses of N and/or water applied to fertigated crops involve a substantial risk of aquifer contamination by nitrate; but knowledge of N cycling and availability within the soil could assist in avoiding this excess. In central Spain, the main horticultural fertigated crop is the melon type ?piel de sapo¿ and it is cultivated in vulnerable zones to nitrate pollution (Directive 91/676/CEE). However, until few years ago there were not antecedents related to the optimization of nitrogen fertilization together with irrigation. Water and N footprint are indicators that allow assessing the impact generated by different agricultural practices, so they can be used to improve the management strategies in fertigated crop systems. The water footprint distinguishes between blue water (sources of water applied to the crop, like irrigation and precipitation), green water (water used by the crop and stored in the soil), and it is furthermore possible to quantify the impact of pollution by calculating the grey water, which is defined as the volume of polluted water created from the growing and production of crops. On the other hand, the N footprint considers green N (nitrogen consumed by the crops and stored in the soil), blue N (N available for crop, like N applied with mineral and/or organic fertilizers, N applied with irrigation water and N mineralized during the crop period), whereas grey N is the amount of N-NO3- washed from the soil to the aquifer. All these components are expressed as the ratio between the components of water or N footprint and the yield (m3 t-1 or kg N t-1 respectively). The objetives of this work were to evaluate the impact derivated from the use of different fertilizer practices in a melon crop using water and N footprint.
International
Si
Congress
18th Nitrogen Workshop: The nitrogen challenge:Building a blueprint for nitrogen use efficiency and food security
960
Place
Lisboa, Portugal
Reviewers
Si
ISBN/ISSN
978-972-8669-56-0
Start Date
30/06/2014
End Date
03/07/2014
From page
559
To page
561
Proccedings
Participants
  • Autor: Maria Isabel Requejo Mariscal (UPM)
  • Autor: Maria Carmen Cartagena Causape (UPM)
  • Autor: Raquel Villena Gordo (UPM)
  • Autor: Augusto Arce Martinez (UPM)
  • Autor: F Ribas
  • Autor: M.J. Cabello
  • Autor: Ana Maria Tarquis Alfonso (UPM)
  • Autor: Maria Teresa Castellanos Serrano (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Contaminación de agroecosistemas por las prácticas agrícolas
  • Grupo de Investigación: Grupo de Automatización en Señal y Comunicaciones (GASC)
  • Grupo de Investigación: Sistemas de producción y protección vegetal sostenibles
  • Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM). Centro Mixto UPM-AGROMUTUA-ENESA
  • Departamento: Química y Tecnología de Alimentos
  • Departamento: Matemática Aplicada
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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