Using 3D architectural models to assess light availability and root bulkiness in coconut agroforestry systems
Lamanda Nathalie, Dauzat Jean, Jourdan Christophe, Martin Philippe, Malézieux Eric. 2008. .
ARTICLE, (2008 ) - PUBLISHEDVERSION - English (en-GB)
OPENACCESS -
http://hal.archives-ouvertes.fr/licences/copyright/.
Audience : OTHER
HAL CCSD, Springer Verlag
Sujet
Light partitioning, Root colonization, Vanuatu, Cocos nucifera L, Above- and below-ground competition, Cocos nucifera L., Cropping system, [SDE.MCG.AGRO]Environmental Sciences/Global Changes/domain_sde.mcg.agro, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Domaines
Agriculture, Agroforesterie, Coco, Biologie, Sciences de l'environnement
Description
Publication Inra prise en compte dans l'analyse bibliométrique des publications scientifiques mondiales sur les Fruits, les Légumes et la Pomme de terre. Période 2000-2012. http://prodinra.inra.fr/record/256699 International audience Using 3D architectural models to assess light availability and root bulkiness in agroforestry systems. In many parts of the humid tropics, coconut trees are frequently intercropped with food crops, or tree crops such as cocoa. The performance of such systems depends on planting patterns, but also on growing conditions for crops below the coconut canopy throughout the development of the coconut trees. We used a modelling approach providing indicators for assessing above-ground competition for light and below-ground competition for space, in order to optimize intercropping in coconut smallholdings. Light transmission and the number of coconut roots in the interrow were assessed in coconut smallholdings from 6 to 60 years old. The modelling of light transmission through coconut stands was based on three-dimensional virtual coconut trees and a numerical light model that computed the shade cast by coconut trees on underlying crops. Root colonization in the interrow was assessed with virtual 3D coconut root systems. Our results showed that intercropping with shade-tolerant species was not limited by light transmission from the 35th year after coconut tree planting. However, at that stage of coconut tree development, the density of primary roots in the interrow limited intercrop development, especially for root and tuber crops. Alteration of the planting pattern over time increased light transmission but did not significantly affect root density. This modelling approach, which involved little parameterization that was easily done, appeared to be an efficient tool for recommending coconut tree planting patterns and densities, as well as indicating intercrop potential depending on their location in the most sunlit areas with minimum root competition.
Auteurs
Lamanda, Nathalie, Dauzat, Jean, Jourdan, Christophe, Martin, Philippe, Malézieux, Eric
Contributeurs
Fonctionnement et conduite des systèmes de culture tropicaux et méditerranéens (UMR SYSTEM) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM) ; Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Fonctionnement et pilotage des écosystèmes de plantations (UPR Ecosystèmes de plantations) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Sciences pour l'Action et le Développement : Activités, Produits, Territoires (SADAPT) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech
Sources
ISSN: 0167-4366, EISSN: 1572-9680, Agroforestry Systems, https://hal.archives-ouvertes.fr/halsde-00271503, Agroforestry Systems, Springer Verlag, 2008, 72 (1), pp.63-74. ⟨10.1007/s10457-007-9068-3⟩
Relation
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10457-007-9068-3
