Wzrost i stabilność świerka pospolitego (Picea abies (L.) Karst) na powierzchni proweniencyjnej w Krynicy (seria doświadczalna IUFRO 1964/68)

The research was performed on Norway spruce growing at the IUFRO 1964/68 experimental trial in Krynica (the Carpathians, S Poland). The growth and stability of Norway spruce were assessed taking into account the division into geographical regions proposed by Krutzsch. The height and breast height diameter were measured, on the basis of which the volume and the slenderness ratio were calculated. The stability class of each tree was also determined based on the slenderness. Significant differences were found between the Krutzsch regions for each of the analyzed traits. Spruces from region 75 (Belarus), as well as spruces from regions in the north−eastern range of the species occurrence in Poland, had above−average values of each trait. Spruces from regions in the southern part of Poland also had a good growth, but they were characterized by a large share of trees with unfavorable stability (slenderness ratio>80). The worst growth was noted for spruces from all regions located on the Scandinavian Peninsula. In the cluster analysis, four groups of Krutzsch regions were distinguished. They differed in terms of mean values of the analysed features. The best growth, tree volume and stability were characteristic for spruces from regions located in Germany, the Czech Republic, Slovakia, Poland, Belarus, Lithuania, Latvia and Russia (group C). Contrary to group D, which includes regions from the central part of the Scandinavian Peninsula, France, Tyrol and Dalmatia, the rest of spruce trees had the worst growth, low stem volume and large share of trees (>50%) classified as very unstabile.
Sylwan 165 (1): 9-20