High soil calcium saturation limits use of leaf potassium diangosis when KCL is applied in oil palm plantations

Dubos Bernard, Baron Victor, Bonneau Xavier, Flori Albert, Ollivier Jean. 2018. High soil calcium saturation limits use of leaf potassium diangosis when KCL is applied in oil palm plantations. Experimental Agriculture, 54 (5) : 794-804.

Quartile : Q1, Sujet : AGRONOMY

Résumé : Potassium chloride (KCl) is the most widely used fertilizer in oil palm (Elaeis guineensis) plantations and the rates applied are based on interpretation of leaf K contents. When no positive response on leaf K contents can be detected, no optimum content can be established whatever the yield response to KCl rates. We used data from 13 fertilization trials conducted on several continents to study the responses of leaf K, leaf Cl, leaf Ca and yield to KCl rates as a function of the soil properties of each site. We found that the abundance of exchangeable Ca in the soil expressed as a percent of the cation exchange capacity (CEC) was the best soil variable to predict if leaf K content would increase with KCl rates. In addition, we found that the leaf K contents of unfertilized controls at the end of the trials were also correlated with Ca/CEC. This ratio thus appears to be a better index of soil K reserves than soil exchangeable K content.

Mots-clés Agrovoc : plantation forestière, Elaeis guineensis, fertilisation, application foliaire, calcium, chlorure de potassium, transport des substances nutritives, analyse de tissu foliaire, analyse de sol

Mots-clés géographiques Agrovoc : Indonésie

Mots-clés libres : KCl fertilization, Oil palm, Soil exchange complex, Leaf analyses, K content response

Classification Agris : F04 - Fertilisation
K10 - Production forestière
F61 - Physiologie végétale - Nutrition
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Dubos Bernard, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA) - auteur correspondant
• Baron Victor, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
• Bonneau Xavier, CIRAD-PERSYST-UPR Systèmes de pérennes (IDN)
• Flori Albert, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
• Ollivier Jean, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/585789/)

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