Water and nitrogen footprint in an irrigated crop under mineral and organic fertilization

Requejo, Maria Isabel and Cartagena Causape, Maria Carmen and Villena Gordo, Raquel and Arce Martinez, Augusto and Ribas Elcorobarrutia, Francisco and Cabello Cabello, María Jesús and Tarquis Alfonso, Ana Maria and Castellanos Serrano, Maria Teresa (2014). Water and nitrogen footprint in an irrigated crop under mineral and organic fertilization. In: "18th Nitrogen Workshop", 30/06/2014-03/07/2014, Lisboa, Portugal. ISBN 978-972-8669-56-0. p. 3.

Description

Title: Water and nitrogen footprint in an irrigated crop under mineral and organic fertilization
Author/s:
  • Requejo, Maria Isabel
  • Cartagena Causape, Maria Carmen
  • Villena Gordo, Raquel
  • Arce Martinez, Augusto
  • Ribas Elcorobarrutia, Francisco
  • Cabello Cabello, María Jesús
  • Tarquis Alfonso, Ana Maria
  • Castellanos Serrano, Maria Teresa
Item Type: Presentation at Congress or Conference (Article)
Event Title: 18th Nitrogen Workshop
Event Dates: 30/06/2014-03/07/2014
Event Location: Lisboa, Portugal
Title of Book: The nitrogen challenge: building a blueprint for nitrogen use efficiency and food security
Date: 2014
ISBN: 978-972-8669-56-0
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 37578
DC Identifier: http://oa.upm.es/37578/
OAI Identifier: oai:oa.upm.es:37578
Deposited by: Memoria Investigacion
Deposited on: 05 Nov 2015 16:36
Last Modified: 06 Jun 2016 16:36
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