tailieunhanh - Báo cáo lâm nghiệp: "Age-related physiological and structural traits of chestnut coppices at the Castelli Romani Park (Italy)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Age-related physiological and structural traits of chestnut coppices at the Castelli Romani Park (Italy)" | Ann. For. Sci. 63 2006 239-247 INRA EDP Sciences 2006 DOI forest 2006002 239 Original article Age-related physiological and structural traits of chestnut coppices at the Castelli Romani Park Italy Francesca Covone Loretta Gratani Dipartimento di Biologia Vegetale Università degli Studi di Roma La Sapienza piazzale Aldo Moro n 5 00185 Roma Italy Received 15 June 2005 accepted 27 October 2005 Abstract - Coppices of Castanea sativa Miller 1 5 7 10 12 17 23 26 and 30 years old stands were investigated. Total basal area BA ranged from m1 2 ha-1 1 year old stands to m2 ha-1 30 years old stands and Leaf Area Index LAI from m2 m-2 1 year old stands to m2 m-2 12 years old stands . Morphological and physiological leaf traits were analysed in 5 YC and 23 years old stands OC to point out the functional responses to clearing impact. The results pointed out the high productivity of C. sativa in the Park due to favourable climatic and soil conditions. Significant differences of morpho-physiological leaf traits between YC and OC stands were observed during the last period of the vegetative cycle it could be due to the higher efficiency in resource use of YC leaves than OC. chestnut coppice age LAI leaf physiology leaf morphology Résumé - Effet de l âge sur la physiologie et la morphologie foliaire des taillis de châtaigner dans le Parc de Castelli Romani Italie . Des taillis de Castanea sativa Miller âgés de 1 5 7 10 12 17 23 26 et 30 ans ont été étudiés. La surface totale de base BA variait de 4 9 1 9 m2 ha-1 peuplement de 1 an à 41 0 2 3 m2 ha-1 peuplement de 30 ans et l indice de surface foliaire LAI de 0 18 0 08 m2 m-2 peuplement de 1 an à 5 00 0 22 m2 m-2 peuplement de 12 ans . La morphologie et la physiologie de caractéristiques foliaires ont été examinées dans les peuplements âgés de 5 YC et 23 ans OC de faẹon à montrer les réponses fonctionnelles à l impact de la coupe. Les résultats montrent une productivité élevée du .