Obouayeba Samuel, Boa Daniel, Gohet Eric, Dian Kouadio, Ouattara N., Keli Zagbahi Jules.
1998. Contribution of the dynamics of vegetative growth of Hevea brasiliensis to the determination of tapping norms.
In : Symposium on natural rubber (Hevea brasiliensis) : Vol II : Physiology and exploitation and crop protection and planting methods sessions = [Symposium sur le caoutchouc naturel (Hevea brasiliensis) : Vol II : sessions physiologie et exploitation, prot
Autre titre : Contribution de la dynamique de croissance végétative d'Hevea brasiliensis à la détermination de normes pour la saignée
Résumé : A study to determine "norms" for the tapping of Hevea brasiliensis is being carried out in Cote d'ivoire. This is aimed at defining an age and minimum circumference for the opening of Hevea which takes into account the notion of physiological maturity. The modelled vegetative growth curve is a sigmoid with a gradient change point at the third phase that is a plausible solution to the problems of this study. Analysis of growth dynamics shows that this point hardly varies, irrespective of the growth class of the clone, and takes place at the sixth year after planting. In addition, several observations on the growth of Hevea under different conditions lead to the proposal of a minimum tapping circumference linked with the growth class, thus combining the notion of age and size. This study finally shows that economic objectives are not always adequate for some of the requirements for the development of plants.
Mots-clés Agrovoc : Hevea brasiliensis, saignée, normalisation, croissance, stade de développement végétal, métabolisme, maturité, modèle mathématique
Mots-clés géographiques Agrovoc : Côte d'Ivoire
Mots-clés complémentaires : Système de saignée
Classification Agris : F60 - Physiologie et biochimie végétale
F62 - Physiologie végétale - Croissance et développement
F01 - Culture des plantes
Auteurs et affiliations
- Obouayeba Samuel
- Boa Daniel
-
Gohet Eric, CIRAD-CP-HEVEA (FRA)
ORCID: 0000-0002-0379-0592
- Dian Kouadio
- Ouattara N.
- Keli Zagbahi Jules
Source : Cirad - Agritrop (https://agritrop.cirad.fr/390130/)
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