Base de Données Bibliographiques de l'INRA


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Date entered:20120920
Last modified:20121002
Team:inraseb
ARN:MA201200039
Record status:C
Bibl. level:AS
Type of publication:J
English title:Response of Clementine Citrus var. Cadoux to Foliar Potassium Fertilization; Effects on Fruit Production and Quality
French title:Fertilisation foliaire potassique des agrumes: Effet sur la production et la qualit' du cl'mentinier "Cadoux"
Languages:(En)
Authors:Hamza, A. (INRA, Kenitra (Ma) centre Rىgional de la Recherche Agronomique de Kenitra), E-mail:hamza.abdelhak@gmail.com; Bamouh, A. (Institut Agronomique et Veterinaire Hassan II, Rabat (Maroc)), E-mail:bamouh@gmail.com; El Guilli, M. (INRA, Kenitra (Ma) centre Rىgional de la Recherche Agronomique de Kenitra), E-mail:mguilli@yahoo.com; Bouabid, R. (Ecole Nationale d'Agriculture, Meknes (MA))
Collation:p. 8-28
Summary:R'sumés (En)
Notes:2 tables, 3 fig., 2 ill.
On-line availability -A:http://webagris.inra.org.ma/doc/hamza06121.pdf
Serial title:e-ifc
Date od publ.-S:(jun 2012)
Collation-S:n° 31
Languages-S:(En)
Availability-S:INRA DIC 6512 RI Rabat Instituts Morocco -
Online avail.-S:http://www.ipipotash.org/fr/k-center/detail.php?i=10
Prim.subj.categ.:F04-Fertilizing
Sec.subj.categ.:F61-Plant physiology - Nutrition
Descriptors - En:CLEMENTINES; CITRUS RETICULATA; FOLIAR APPLICATION; POTASH FERTILIZERS; QUALITY; FRUIT; CROP YIELD;
Descriptors - Fr:CLEMENTINE; CITRUS RETICULATA; APPLICATION FOLIAIRE; ENGRAIS POTASSIQUE; QUALITE; FRUIT; RENDEMENT DES CULTURES;
Descriptors - Sp:CLEMENTINA; CITRUS RETICULATA; APLICACION FOLIAR; ABONOS POTASICOS; CALIDAD; FRUTO; RENDIMIENTO DE CULTIVOS;
Abstract:Clementine var. Cadoux is a citrus fruit that is well appreciated by consumers. However, this cultivar tends to produce fruits of small to medium size that are less accepted commercially. In this field study, we evaluated the effects of various rates and frequencies of foliar potassium (K) fertilization, as either potassium nitrate (KNO3) or potassium sulfate (K2SO4), on fruit production (fruit size, weight and yield) and quality parameters (skin thickness, firmness, color index, maturity index, juice content, acidity and total soluble sugars). Application rates of tested foliar fertilizers were 5 percent and 8 percent KNO3, and 2.5 percent and 4 percent for K2SO4, applied either two or three times during fruit growth on orchards of three planting densities (D1: 6 x 6 m, D2: 5 x 6 m and D3: 6 x 3.5 m tree spacing). The levels of K in leaves of clementine var. Cadoux increased by up to 40 percent two weeks after the last foliar K application. Fruit weight increased with K application rate and frequency. K fertilization treatments in three foliar applications showed the best percentages of fruits of extra size class, whatever the source of K (KNO3 or K2SO4) or plant density. Foliar applications of K increased fruit color, firmness and rind thickness. Fruit juice content, acidity and total soluble sugars were slightly increased by foliar K application. Raising K concentration and the number of foliar applications increased tree fruit production. In terms of efficiency of foliar K fertilizers, 4 percent K2SO4 in three applications resulted in a maximum gain of fruits per kg of foliar fertilizer.
MFN:001693