TAILIEUCHUNG - Báo cáo khoa học: "The relative importance of cork harvesting and climate for stem radial growth of Quercus suber "

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: The relative importance of cork harvesting and climate for stem radial growth of Quercus suber L. | Ann. For. Sci. 59 2002 439-443 INRA EDP Sciences 2002 DOI forest 2002018 439 Original article The relative importance of cork harvesting and climate for stem radial growth of Quercus suber L. Graẹa Oliveira Maria Amelia Martins-Louẹão and Otília Correia CEBV - Centro de Ecologia e Biologia Vegetal Faculdade de Ciências da Universidade de Lisboa Campo Grande C2 4 1749-016 Lisboa Portugal Received 16 May 2001 accepted 9 October 2001 Abstract - Growth of cork-oak Quercus suber L. in Iberian stands may depend not only on climate but also on recurrent cork harvesting and stand management. In this work trees from sites with different managements were studied for 3-6 years. Radial increments were enhanced following harvesting mm yr-1 and decreased afterwards mm yr-1 . Time after harvesting was the primary factor affecting radial growth of Q. suber but trunk growth also correlated negatively with Autumn-Winter precipitations and minimum temperatures and positively with Spring rainfall. Spring radial increment varied significantly between sites. climate cork harvesting montado Quercus suber growth Résumé - Importance relative de la récolte du liège et du climat sur la croissance radiale de Quercus suber L. La croissance du chêne liège Quercus suber L. des peuplements ibériques peut dépendre non seulement du climat mais aussi de la récolte du liège et de l amenagement du peuplement. Dans ce travail des arbres provenant de sites caractérisés par divers types d amenagement ont été étu-diés pendant 3 à 6 ans. L accroissement radial étaitaccrũ après larécolte 4 0-8 2mmyr1 etdiminué ensuite 4 3 mm yr1 . Le temps depuis la récolte était le facteur primordial affectant la croissance du tronc de Quercus suber mais celle-ci était aussi corrélée négative-ment avec les précipitations et températures minimales de l automne et de l hiver et positivement avec la pluviométrie printanière. L ac-croissement radial au printemps varie significativement entre les sites. .

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