Root architecture and wind-firmness of mature Pinus pinaster

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.

Bibliographic Details

Main Authors:	Danjon, Frédéric, Fourcaud, Thierry, Bert, Didier
Format:	article biblioteca
Language:	eng
Subjects:	F50 - Anatomie et morphologie des plantes, U10 - Informatique, mathématiques et statistiques, K70 - Dégâts causés aux forêts et leur protection, F62 - Physiologie végétale - Croissance et développement, Pinus pinaster, système racinaire, stabilité, résistance au vent, dégât dû au vent, vent, propriété rhéologique, mécanique, modèle mathématique, modèle de simulation, http://aims.fao.org/aos/agrovoc/c_5904, http://aims.fao.org/aos/agrovoc/c_16034, http://aims.fao.org/aos/agrovoc/c_36930, http://aims.fao.org/aos/agrovoc/c_8396, http://aims.fao.org/aos/agrovoc/c_8392, http://aims.fao.org/aos/agrovoc/c_8401, http://aims.fao.org/aos/agrovoc/c_6553, http://aims.fao.org/aos/agrovoc/c_35220, http://aims.fao.org/aos/agrovoc/c_24199, http://aims.fao.org/aos/agrovoc/c_24242,
Online Access:	http://agritrop.cirad.fr/530292/ http://agritrop.cirad.fr/530292/1/document_530292.pdf
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