Stand structure and growth of pure beech forests on the mountain Kum

Na pobočjih Kuma smo postavili dve raziskovalni ploskvi v čistih gorskih bukovih gozdovih na nadmorskih višinah 600 in 1070 m. Na ploskvah smo izvedli polno premerbo sestojev. Na izbranih 15 dominantnih bukovih drevesih na ploskev smo pridobili prirastne izvrtke. Pomladek smo na ploskvi evidentirali na 9 sistematično razmeščenih ploskvicah dimenzij 2 × 2 m. Med ploskvama smo primerjali glavne sestojne parametre, iz prirastnih izvrtkov smo izračunali letne debelinske prirastke, primerjali smo značilnosti pomlajevanja. Primerjalna analiza je v nasprotju z zastavljenimi hipotezami pokazala, da so bile vrednosti sestojnih parametrov višje na višje ležeči ploskvi in da so dominantna drevesa tam intenzivneje priraščala. Pomladek je bil številčnejši na nižje ležeči ploskvi. Možni vzroki razlik med ploskvama so razlike v rastiščnih lastnostih, preteklo gospodarjenje, razlika v starosti sestojev in drugi zunanji okoljski dejavniki.Two research plots were established in pure European beech (Fagus sylvatica) mountain forests on the slopes of the Kum mountain at the altitudes of 600 and 1070 m above sea level. Stands were inventoried by full callipering. 15 dominant beech trees on each plot were cored to perform radial growth analysis. Regeneration was surveyed on 9 smaller plots (2 × 2 m in size each) systematically located within each plot. The main stand parameters were compared between both plots, the mean annual radial increments were obtained from the cores, regeneration was compared between plots. The comparative analysis unexpectedly showed that stand parameters reached higher values on the plot at higher altitude. In addition, the dominant trees grew more intensively there. The regeneration reached higher density on the plot at lower altitude. Possible reasons for that are differences in site characteristics and previous forest management between both plots, as well as the difference in stands\u27 age and other environmental factors