Root architecture and wind-firmness of mature Pinus pinaster

Danjon Frédéric, Fourcaud Thierry, Bert Didier. 2005. Root architecture and wind-firmness of mature Pinus pinaster. New Phytologist, 168 (2) : pp. 387-400.

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Abstract : This study aims to link three-dimensional coarse root architecture to tree stability in mature timber trees with an average of 1-m rooting depth. Undamaged and uprooted trees were sampled in a stand damaged by a storm. Root architecture was measured by three-dimensional (3-D) digitizing. The distribution of root volume by root type and in wind-oriented sectors was analysed. Mature Pinus pinaster root systems were organized in a rigid 'cage' composed of a taproot, the zone of rapid taper of horizontal surface roots and numerous sinkers and deep roots, imprisoning a large mass of soil and guyed by long horizontal surface roots. Key compartments for stability exhibited strong selective leeward or windward reinforcement. Uprooted trees showed a lower cage volume, a larger proportion of oblique and intermediate depth horizontal roots and less wind-oriented root reinforcement. Pinus pinaster stability on moderately deep soils is optimized through a typical rooting pattern and a considerable structural adaptation to the prevailing wind and soil profile. (Résumé d'auteur)

Mots-clés Agrovoc : Pinus pinaster, Système racinaire, Stabilité, Résistance au vent, Dégât du au vent, Vent, Propriété rhéologique, Mécanique, Modèle mathématique, Modèle de simulation

Mots-clés complémentaires : Architecture végétale

Classification Agris : F50 - Plant structure
U10 - Computer science, mathematics and statistics
K70 - Forest injuries and protection
F62 - Plant physiology - Growth and development

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

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