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Báo cáo toán học: "An introduction on below-ground environment and resource acquisition, with special reference on trees. Simulation models should include plant structure and function"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: An introduction on below-ground environment and resource acquisition, with special reference on trees. Simulation models should include plant structure and function. | 513 Ann. For. Sci. 57 2000 513-520 INRA EDP Sciences Original article An introduction on below-ground environment and resource acquisition with special reference on trees. Simulation models should include plant structure and function Loic Pagèsa Claude Doussanb and Gilles Vercambrea INRA Centre d Avignon aEcophysiologie et Horticulture 84914 Avignon Cedex 9 France b Science du Sol Site Agroparc 84914 Avignon Cedex 9 France Received 1 February 1999 accepted 12 July 1999 Abstract - Resource acquisition within the soil is a complex process which consists of several sub-processes involving both the soil and the plant. A brief analysis of the whole system is presented first by focusing on the components of the system and then on the successive events. This analysis stresses the diversity and specificity of the components involved as well as their interactive roles at several organisation levels both in space and time. Therefore a systemic approach using dynamic models is defended in order to gather available knowledge and gain new insight within the whole system. In comparison to many of the traditional modelling approaches which tended to over-simplify the plant part of the system some new and promising attempts are presented. These new models give a good illustration of what can be expected to be gained by associating structural and functional characteristics of the plant components. model root system soil - plant system uptake Résumé - Introduction sur l environnement souterrain et l acquisition des ressources avec references particulières aux arbres. Les modèles de simulation devraient inclure la structure et les fonctions de la plante. L acquisition des ressources du sol est un processus complexe que l on peut subdiviser en plusieurs processus plus élémentaires faisant intervenir conjointement la plante et le sol. Nous faisons une brève analyse de ce système en insistant d abord sur ses composants puis sur les événements succes-sifs. Cette analyse révèle la .