TAILIEUCHUNG - Báo cáo khoa học: "Conditions for oak selection in Poland"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:Conditions for oak selection in Poland. | 452s Ann Sci For 1993 50 Suppl 1 452S-455S Elsevier INRA Note Conditions for oak selection in Poland J Sabor Academy of Agriculture Faculty of Forestry Department of Seed Production Nursery and Forest Trees Selection Krakow al 29 Listopoada 46 Poland Summary Details of the occurrence and quality of native oaks Quercus petraea and Q robur and a program for their selection in Poland are presented. Most investigations are being carried out at the Forestry Faculty of the Academy of Agriculture in Kracow. They include an analysis of the reasons for oak wilt and investigations into the possibilities of selection on the basis of so-called biologically mature stands once genetic variability has been determined. Quercus robur Quercus petraea I selection I quality I oak decline Resume Conditions de selection du chêne en Pologne. Cette contribution rassemble les don-nées relatives à la distribution et à la qualité des peuplements des chênes indigenes de Pologne Quercus petraea et Quercus robur et présente un programme d amelioration des 2 espèces. La plupart de ces recherches sont menées par la faculte forestiere de I Academie d agriculture de Cra-covie. Elies concernent I analyse des causes du fletrissement des chênes oak wilt les perspectives de selection des chénes dans des peuplements matures au plan biologlque dès tors que I ampli-tude de la variabilité génétlque a été appréciée. Quercus robur Quercus petraea selection qualité dépérìssement du chêne OCCURRENCE The genus Quercus is represented in Poland by 3 natives species sessile oak O petraea Mattuschka Liebl pedunculate oak Q robur L and pubescent oak Ơ pu-bescens Willd . Among exotic species the American eastern red oak Q rubra L is the most important. Only sessile and pedunculate oaks occur in mixed stands. Both these species are absent from mountains Q robur reaches a maximum of 600-700 m above sea level and Q pe-traea 700-800 m in the Carpathian foothills. Sessile oak extends aver all of Poland except the northern

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