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Accueil du site → Master → Espagne → Estudio de la interacción entre nitrógeno y potasio en plantas de olivo.

Université de Cordoba (2019)

Estudio de la interacción entre nitrógeno y potasio en plantas de olivo.

Martos García Inmaculada

Titre : Estudio de la interacción entre nitrógeno y potasio en plantas de olivo.

Auteur : Martos García Inmaculada

Université de soutenance : Université de Cordoba

Le programme du Master est organisé conjointement par Universidad de Córdoba (UCO), Consejería de Agricultura, Pesca y Medio Ambiente de la Junta de Andalucía (CAP), Instituto Andaluz de Investigación y Formación Agraria, Pesquera, Alimentaria y de la Producción Ecológica (IFAPA), Centre International de Hautes Etudes Agronomiques Méditerranéennes (CIHEAM) à travers l’Institut Agronomique Méditerranéen de Zaragoza (IAMZ), Consejo Superior de Investigaciones Científicas (CSIC) et Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)

Grade : Master Universitaire en Oliviculture et Oléotechnie 2019

Résumé en Espagnol – Anglais
Nitrogen and potassium fertilization represent the main nutritional problem of olive orchards. Currently a common practice is overfertilization with N, due to the farmer´s perception that an increase in N always results in a higher yield. However, in the Mediterranean Basin, the main nutritional problem results from the low levels of K observed in the rain-fed olive grove, induced by the lack of soil available K, low moisture in the soil, or by interactions with other nutrients. These interactions occur at both soil and plant level, so that the absorption and use of one element is defined by the concentration of another. In the olive, the information related to nitrogen/potassium interaction effect is scarce. For that reason, the aim of the present work was to study the nitrogen/potassium interaction effect on plant growth and the efficiency of uptake N and K (EUN and EUK, respectively). For this purpose, `Picual’ olive plants were cultivated applying different irrigation solutions resulting from the combination of two levels of K (0.05 and 2.5 mM KCl) and three levels of N (0, 100 and 400 ppm). Two sources of N, urea and calcium nitrate (Ca (NO3)2), were selected. A factorial randomized block design was established with six treatments and four blocks. When differences in growth between treatments were observed (20 weeks from the onset of the experiment), the plants were harvested. Plant growth showed a quadratic response related to the doses of N applied, independently of the level of K. Shoot length showed a similar effect, and 100 ppm of N was the most effective dose. Both the EUN and EUK decreased when applying high doses of N. This effect was more marked in the EUK with low levels of K and when urea was applied as a source of nitrogen.

Source : Master of Oliviculture et Oleotechnie

Page publiée le 26 février 2021