tailieunhanh - Báo cáo khoa học: "Preliminary results of common oak (Quercus robur L) provenance experiments"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Preliminary results of common oak (Quercus robur L) provenance experiments. | Ann Sei For 1993 50 Suppl 1 215S-221S Elsevier INRA 215s Original article Preliminary results of common oak Quercus robur L provenance experiments in Croatia J Gracan Forest Research Institute Jastrebarsko Cvijethno Naslje 41 41420 Jastrebarsko Croatia Summary The first experiment with 16 provenances of Quercus roburL from Croatia was established in the nursery of the Forest Research Institute in Jastrebarsko in the spring of 1986. Field experiments with 4 randomized blocks in 2 localities were laid out in 1988. After 5 years 1990 the Spacva provenance performed best in terms of height growth. Survival varied from Moto-vunska Suma at Slavir to Gunja at Gajno . provenance Quercus robur height growth I survival Croatia Resume Résultats préliminaires de plantations comparatives de provenances de chêne pé-donculé Quercus robur L en Croatie. La premiere comparaison de provenances de Quercus robur L de Croatia a été mise en place dans la pépinière de I lnstitut de recherches forestieres de Jastrebarsko au printemps 1986. Elie comprend 16 provenances. Les tests en foret ont été installés dans 2 stations chacune comprend 4 blocs randomises. À I issue de la cinquième année de vegetation la provenance Spacva s est avérée la plus vigoureuse croissance en hauteur . Les taux de sur-vie varient de 34 provenance Motovunska ổuma dans la station Slavir à 98 5 provenance Gunja dans la station Gajno . provenance I Quercus robur croissance en hauteur survie I Croatia INTRODUCTION Common oak Quercus robur L is one of the most valuable and the most important forest trees in Croatia. The value and quality of the wood of the famous Slavonian oak is well known in Croatia and in world markets. However difficulties with natural regeneration and forest decline require more extensive production of oak seedlings from forest nurseries Dokus and Komlenovic 1979 Androic 1987 Prpic 1987 . Considering these facts proper provenance sources are very important Komlenovic et al 1988 . The main

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