RŮST PROVENIENCÍ JEDLE BĚLOKORÉ NA VÝZKUMNÉ PLOŠE V ZÁPADNÍCH ČECHÁCH VE VĚKU 36 LET.

One of the projects aimed at solving the problem of the decline of silver fi r in the Czech Republic in the 1970s was the establishment of a 20-member series of provenance plots with 153 provenances representing almost the entire distribution area of the species. The work presents results of the evaluation of 36 provenances of silver fir originating from 10 European countries, which are verified in the research plot No. 62 – Nýrsko (western Bohemia). The age of evaluated stands is 36 years. Heights, d.b.h., stem shape and health status of all living trees were determined. Calculated volumes of large wood were compared with the yield tables. Results are interpreted in connection with the assessment of geographical variability within the provenance zones, climatypes and European forest zoning. Based on the obtained data, Czech provenances CZ 185 – Bruntál, CZ 198 – Vítkov and CZ 37 – Rychnov nad Kněžnou belonging to climate type 6c – Lusatian, and also French F 118 – SaintÉvroult II (climatype 3 – Normandy) were evaluated as the best growing. The Italian provenance I 227 – Popi e Bibbiena and the French F 162 – Les Fanges IV proved to be the least successful. Only average values were reached by the provenances belonging to the local climatype 6b – Šumava. [ABSTRACT FROM AUTHOR]