ZLV Online

Abstract

The lack of high-quality local reproductive material, which makes it impossible to reforest large clearings after the calamity, results in the search for other suitable sources. Extensive testing of the spruce provenances in various conditions started as early as in 1960s and lasts until today. The presented study is focused on research plots from the series 1984/86–1990 with the Norway spruce’s progenies of certified units of category IIA taken within the whole territory of the Czech Republic. On two selected research plots Úsov and Jedovnice evaluation of both quantitative (tree height, DBH) and qualitative traits (stem form, stem damage, defoliation and health state) was performed. Measured provenances in young middle age growing in the conditions with a lack of precipitation showed initial growth and morphological differentiation. The highest growing stock as for the Úsov plot was achieved by provenance 46 – Janovice, Karlov pod Pradědem 2, and in the Jedovnice plot it was provenance 50 – Rožnov pod Radhoštěm, Horní Bečva. Low defoliation and overall good health state on both plots indicate resistance to external abiotic and biotic factors. In both research plots it was possible to define sets of above-average, average and below-average evaluated provenances. In summary, provenances originated from the Vysočina, Jeseníky and Beskydy mountains thrived in both plots.