Effect of different fertilization strategies on nitrogen balance in an outdoor potted crop of Osteospermum ecklonis (DC.) Norl. ‘Purple Red’ under Mediterranean climate conditions
Visualitza/Obre
Data de publicació
2013-07-15ISSN
1695-971X
Resum
Fertilization management and meteorological conditions can affect leachate composition and the balance of nitrogen
(N) added during the cultivation of ornamentals. The main objectives of this study were to estimate the N balance
components and to establish relationships between the N concentration in leachates and meteorological variables when
different fertilization strategies are used in an outdoor potted crop of Osteospermum ecklonis (DC.) Norl. ‘Purple
Red’. Two fertilizations strategies, i.e. continuous fertigation (NS) and incorporated controlled-release fertilizer (CRF),
were applied to the crop. The treatments were two NS doses (NO3 –-N concentration in each NS, NS-A: 154 mg L–1 and
NS-B: 112 mg L–1) and two CRF doses (CRF-C: 5.0 g L–1 of substrate and CRF-D: 2.5 g L–1 of substrate). The N loss
by leaching was higher in the NS-A treatment than in the other ones (1.1 g pot–1, 11% of total available N). The amount
of N accumulated by the plants was higher in the NS treatments than in the CRF treatments (average 2.5 g pot–1, 29.5%
of total available N). However the efficiency of use of N was the greatest in the CRF-D treatment (23.9 g dry matter
produced g–1 N supplied). About 50% of the total available N was measured in the substrate in all treatments (average
3.8 g pot–1). The concentration of N in the leachates for the two CRF treatments did not correlate with the substrate
temperature or precipitation. The N released from the CRF matched the nutritional requirements of the plants better
than the N applied by continuous fertigation.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
English
Matèries (CDU)
502 - Natura. Estudi, conservació i protecció de la natura
504 - Ciències del medi ambient
Pàgines
9
Publicat per
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Publicat a
Spanish Journal of Agricultural Research
Citació
Narvaez, L., R. Caceres, and O. Marfà. 2013. “Effect of Different Fertilization Strategies on Nitrogen Balance in an Outdoor Potted Crop of Osteospermum Ecklonis (DC.) Norl. ‘Purple Red’ under Mediterranean Climate Conditions”. Spanish Journal of Agricultural Research 11 (3): 833-841. doi: 10.5424/sjar/2013113-3764.
Número de l'acord de la subvenció
INIA/Programa nacional de recursos y tecnologías agroalimentarias/RTA2007-00034-00-00/ES/Técnicas de gestión del fertirriego, de recirculación y de tratamiento de lixiviados en viveros de plantas ornamentales de exterior cultivadas en contenedor/
INIA/Programa Nacional de Proyectos de Investigación Fundamental/RTA2010-00112-00-00/ES/Optimización del compostaje de subproductos orgánicos orientado a la obtención de sustratos/
Programa
Sostenibilitat en Biosistemes
Aquest element apareix en la col·lecció o col·leccions següent(s)
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