Memorias de investigación
Ponencias en congresos:
Water and nitrogen footprint in an irrigated crop under mineral and organic fertilization
Año:2014
Áreas de investigación
  • Agricultura
Datos
Descripción
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.
Internacional
Si
Nombre congreso
18th Nitrogen Workshop: The nitrogen challenge:Building a blueprint for nitrogen use efficiency and food security
Tipo de participación
960
Lugar del congreso
Lisboa, Portugal
Revisores
Si
ISBN o ISSN
978-972-8669-56-0
DOI
Fecha inicio congreso
30/06/2014
Fecha fin congreso
03/07/2014
Desde la página
559
Hasta la página
561
Título de las actas
Proccedings
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • 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