Full text
Preview |
PDF
- Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (7MB) | Preview |
Tarquis Alfonso, Ana Maria ORCID: https://orcid.org/0000-0003-2336-5371, Castellanos Serrano, Maria Teresa, Cartagena Causape, Maria Carmen
ORCID: https://orcid.org/0000-0003-3921-4674, Ribas Elcorobarrutia, Francisco, Cabello Cabello, María Jesús and Arce Martinez, Augusto
ORCID: https://orcid.org/0000-0001-9522-5680
(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.
Title: | Impact of nitrogen uptake on field water balance in fertirrigated melon. |
---|---|
Author/s: |
|
Item Type: | Article |
Título de Revista/Publicación: | Agricultural Water Management |
Date: | 31 March 2012 |
ISSN: | 0378-3774 |
Volume: | 120 |
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 |
Preview |
PDF
- Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (7MB) | Preview |
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.
Item ID: | 15453 |
---|---|
DC Identifier: | https://oa.upm.es/15453/ |
OAI Identifier: | oai:oa.upm.es:15453 |
DOI: | 10.1016/j.agwat.2012.10.020 |
Official URL: | http://www.sciencedirect.com/science/article/pii/S... |
Deposited by: | Memoria Investigacion |
Deposited on: | 31 May 2013 17:59 |
Last Modified: | 21 Apr 2016 15:30 |