Journal of Food, Agriculture and Environment

Vol 1, Issue 3&4,2003
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Seasonal dynamic of 15N applied as nitrate with different irrigation systems and fertilizer management in citrus plants


Ana Quiñones, Josefina Bañuls, Eduardo Primo-Millo, Francisco Legaz *

Recieved Date: 2003-02-11, Accepted Date: 2003-08-27


An experiment was undertaken with trees of the Navelina variety (Citrus sinensis) grafted on Carrizo citrange (Citrus sinensis x P. trifoliata) that were fertilized with 125 g N as K15NO3 and grown outdoors in individual lysimeters in a loam sandy-clay soil. In two groups of three trees, the N dosage was divided into two or five applications in flood irrigation. Another two groups of three trees received the same N dosage, divided into 66 applications with drip irrigation, although with a different percentage of monthly distribution. The results did not show any significant effect on the final weight of the trees. However, the irrigation system significantly influenced the percentage of distribution between above part (71 and 68% for flood and drip irrigation, respectively) and the root system (29 and 32%). The pattern of seasonal variation of the N total concentration in the different organs was similar in all treatments. However, the N derived from fertilizer (Ndff) contributed to the development of new organs in the first stages of the vegetative cycle with greater percentages as the amount of N applied was increased in all treatments. Towards the end of the vegetative cycle (December), the percentages of Nddf in spring leaves were found to be around 30% in the four treatments. However, continuous additions in drip irrigation contributed to a greater extent to Ndff (8%) in summer and autumn leaves than the applications in flood irrigation. The N recovered in the fallen organs was higher in flood irrigation.


Citrus, irrigation methods, labelling N, N dosage split, Ndff, fruit quality

Journal: Journal of Food, Agriculture and Environment
Year: 2003
Volume: 1
Issue: 3&4
Category: Agriculture
Pages: 155-161

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :