Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Elaboration de courbes de croissance en hauteur dominante pour les mélèzes (Larix decidua Mill. et Larix kaempferi (Lamb.) Carr.). | 27 Ann. For. Sci. 56 1999 27-34 Inra Elsevier Paris Article original Elaboration de courbes de croissance en hauteur dominante pour les melezes Larix decidua Mill et Larix kaempferi Lamb. Carr. en Belgique méridionale Dominique Pauwels André Thibaut Philippe Lejeune Jacques Rondeux Faculte universitaire des sciences agronomiques gestion et économie forestieres 2 passage des Déportés 5030 Gembloux Belgique Reẹu le 28 novembre 1997 accepté le 15 juillet 1997 Abstract - Site index curves for larch Larix decidua Mill and Larix kaempferi Lamb. Carr. in Southern Belgium. Site index curves have been determined for Japanese and European larch in Wallonia Southern Belgium figure 1 . Seven models have been tested figure 2 to adjust the data from stem analysis in 19 stands for Japanese larch and in eight stands for European larch table I . The mean squares of the models have permitted to compare each other table II . The Duplat et Tran-Ha model IV is the most suitable to describe the dominant height growth H a In Age 1 b 1-41 p Age with H dominant height a c 0 d i p constants with the same value for all curves table III bị constant associated with the ith curve. The information issued from 194 temporary plots 134 in Japanese larch stands and 60 in European larch is used to determine five productivity levels based upon equal intervals of 3 m between 34 and 22 m of dominant height at 50 years figures 3 and 4 . Considering the little height growth difference between the two species of larch figure 5 and table IV a unique model is retained table V . The growth speed is presented m figure 6. Inra Elsevier Paris. site index curve dominant height stem analyses larch Southern Belgium Resume - Des courbes de croissance en hauteur dominante ont été déterminées pour le meleze du Japon et le meleze d Europe dans le sud de la Belgique. Elies ont été construites à partir des données d analyses de tige provenant de 19 peuplements pour le meleze du Japon et de huit peuplements pour le meleze
