English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/111644
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 1 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título : Utility of the end-of-season nitrate test for nitrogen sufficiency of irrigated maize under Mediterranean semi-arid conditions
Autor : Isla Climente, Ramón ; Salmerón Cortasa, Montserrat ; Cavero Campo, José ; Yagüe Carrasco, María Rosa ; Quílez Sáez de Viteri, Dolores
Palabras clave : basal maize stalk
N-leaching
N fertilizer
sprinkler irrigation
flood irrigation
Fecha de publicación : 2015
Editor: Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (España)
Citación : Isla R, Salmerón M, Cavero J, Yagüe MR, Quílez D. Utility of the end-of-season nitrate test for nitrogen sufficiency of irrigated maize under Mediterranean semi-arid conditions. Spanish Journal of Agricultural Research 13 (1): e09-002 (2015)
Resumen: Calibration of decision tools to improve N fertilizer management is critical to increase its adoption by maize (Zea mays L.) growers. The objective of this study was to establish nitrate and total nitrogen concentrations in the basal maize stalks (BMS) at harvest to separate maize fields among three N availability categories (N-deficient, N-optimum, and N-excess) under Mediterranean irrigated semiarid conditions. We analysed data from 26 irrigated maize trials conducted between 2001 and 2012. Trials included treatments receiving different N fertilizer rates and sources (mineral and organic), irrigation systems (flood, sprinkler) and soil types. The critical nitrate concentration in BMS to identify N-deficient plots (CNCL) is affected by the irrigation system. The CNCL was lower under sprinkler irrigation (708 mg NO3 –– N/kg) than under flood irrigation (2205 mg NO3 –– N/kg), and the later presented a higher degree of uncertainty compared to sprinkler irrigated systems. The results showed the difficulty to identify the N-deficient plots with the BMS test and the higher sensibility of nitrate-N than total-N concentration in BMS to separate N-deficient from N-optimal plots. Under sprinkler irrigation, nitrate in BMS>1500 mg NO3 ––N/kg had a 85% probability of having received an excess of N. Considering economic net returns to N fertilization, the range of nitrate concentration in BMS that maximized profit under sprinkler-irrigated conditions was established between 1100 and 1700 mg NO3 ––N/kg. Results suggest that BMS test can be useful in detecting plots with an excess of N but considering irrigation efficiency is crucial for stablishing successful CNC thresholds.
Descripción : 12 Pags.- 5 Tabls.- 5 Figs.
Versión del editor: http://dx.doi.org/10.5424/sjar/2015131-6806
URI : http://hdl.handle.net/10261/111644
DOI: 10.5424/sjar/2015131-6806
E-ISSN: 2171-9292
Aparece en las colecciones: (EEAD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
CaveroJ_SpaJAgrRes_2015.pdf554,79 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.