Observatorio de I+D+i UPM

Descripción
Proper management of the N applied to crops is necessary in order to increase yield, improve water use efficiency (WUE) and reduce the pollutions risks with the least economic, environmental and health costs. A field study with melon crops was conducted during 2005, 2006 and 2007 in central Spain, using 11 different amounts of N. Some environmental indexes have been proposed, to provide an essential tool for determining the groundwater pollution risks associated with common agricultural practices. These indexes are related to variation in the nitrate concentration of drinking water (Impact Index (II)) and groundwater (Environmental Impact Index (EII)). Also, the Management Efficiency (ME) was calculated, which is related to the amount of fruit produced per gram of N leached (Nl). To determine the optimum dose of N, it was also necessary to know the N mineralisation (NM). Our results show that 160 kg ha?1 of available N (Nav) produced the maximum fruit yield (FY), enhanced WUE and gave an NM of 85 kg ha?1, while the impact indexes did not exceed the fixed maximum allowable limits and ME was adequate. The proposed indexes proved to be an effective tool for determining the risk of nitrate contamination and confirmed that the optimum dose of N corresponded to the maximum FY with minimal loss of Nl.
Internacional	Si
JCR del ISI	Si
Título de la revista	Agricultural Water Management
ISSN	0378-3774
Factor de impacto JCR	1,998
Información de impacto	Datos JCR del año 2011
Volumen	July 2012
DOI	doi.org/10.1016/j.agwat.2012.06.016
Número de revista
Desde la página	1
Hasta la página	10
Mes	SIN MES
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• Autor: M.T. Castellanos
• Autor: Ana Maria Tarquis Alfonso (UPM)
• Autor: Fco. Ribas
• Autor: M.J. Cabello
• Autor: A. Arce
• Autor: M.C. Cartagena

• Creador: Grupo de Investigación: Grupo de Automatización en Señal y Comunicaciones (GASC)
• Departamento: Matemática Aplicada a la Ingeniería Agronómica