Adaptive ability of different provenances of grand fir (Abies grandis Lindl.) in the montane zone of Poland - the LZD Krynica case study.
The present paper reports fragment of a wider study on intraspecific variability of grand fir's (Abies grandis Lindl.) selected provenances. This study covers 7 partial populations of the species originated from region I and II according to Mueller, and tested under the montane conditions of the Beskid Sądecki Mountains. An assessment of particular grand fir's provenances has been done based on empirical data collected during the observation period of years 1983-2006 that is, at the ages of 7, 11, 14, 18, 22 and 26 years. Measured was the height of the trees. The results have proved the significant adaptive stability of grand fir, under the mountainous conditions of the experimental plots situated in the Forest Research Station (LZD) in Krynica. Moreover, some tendency has been found towards decreasing the adaptive ability with growing mean height of the trees. At present, the best adaptive parameters are due to the grand fir offspring from Crescend Creek and Santiam Summit, that is, the east oriented slopes of the Cascade Mountains in the state of Oregon (USA). The degree of grand fir's adaptation to the mountainous conditions of the Beskid Sądecki Range is determined, first of all, by the genotype (provenance).