Impact of nitrogen uptake on field water balance in fertirrigated melon.

Tarquis Alfonso, Ana Maria; Castellanos Serrano, Maria Teresa; Cartagena Causape, Maria Carmen; Ribas Elcorobarrutia, Francisco; Cabello Cabello, María Jesús y Arce Martinez, Augusto (2012). Impact of nitrogen uptake on field water balance in fertirrigated melon.. "Agricultural Water Management", v. 120 (n. null); pp. 56-63. ISSN 0378-3774. https://doi.org/10.1016/j.agwat.2012.10.020.

Descripción

Título: Impact of nitrogen uptake on field water balance in fertirrigated melon.
Autor/es:
  • Tarquis Alfonso, Ana Maria
  • Castellanos Serrano, Maria Teresa
  • Cartagena Causape, Maria Carmen
  • Ribas Elcorobarrutia, Francisco
  • Cabello Cabello, María Jesús
  • Arce Martinez, Augusto
Tipo de Documento: Artículo
Título de Revista/Publicación: Agricultural Water Management
Fecha: 31 Marzo 2012
Volumen: 120
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Agronomic management in Ciudad Real, a province in central Spain, is characteristic of semi-arid cropped areas whose water supplies have high nitrate (NO3?) content due to environmental degradation. This situation is aggravated by the existence of a restrictive subsurface layer of ?caliche? or hardpan at a depth of 0.60 m. Under these circumstances, fertirrigation rates, including nitrogen (N) fertilizer schedules, must be carefully calibrated to optimize melon yields while minimizing the N pollution and water supply. Such optimization was sought by fertilizing with different doses of N and irrigating at 100% of the ETc (crop evapotranspiration), adjusted for this crop and area. The N content in the four fertilizer doses used was: 0, 55, 82 and 109 kg N ha?1. Due to the NO3? content in the irrigation water, however, the actual N content was 30 kg ha?1 higher in all four treatments repeated in two different years. The results showed correlation between melon plant N uptake and drainage (Dr), which in turn affects the amount of N leached, as well as correlation between Dr and LAI (leaf area index) for each treatment. A fertilizer factor (?) was estimated through two methods, from difference in Dr and in LAI ratio with respect to the maximum N dose, to correct ETc based on N doses. The difference was found in the adjusted evapotranspiration in both years using the corresponding ? achieved 42?49 mm at vegetative period, depending on the method, and it was not significant at senescent period. Finally, a growth curve between N uptake and plant dry weight (DW) for each treatment was defined to confirm that the observed higher plant vigour, showing higher LAI and reduced Dr, was due mainly to higher N doses.

Más información

ID de Registro: 15453
Identificador DC: http://oa.upm.es/15453/
Identificador OAI: oai:oa.upm.es:15453
Identificador DOI: 10.1016/j.agwat.2012.10.020
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0378377412002776
Depositado por: Memoria Investigacion
Depositado el: 31 May 2013 17:59
Ultima Modificación: 21 Abr 2016 15:30
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