Značilnosti sestojnih vrzeli v izbranih bukovih in jelovo-bukovih pragozdnih ostankih Slovenije

Namen naloge je bil v pragozdu Rajhenavski Rog preučiti razvojno dinamiko vrzeli, obnovitvene cikle ter narediti terestrično analizo vrzeli. Uporabili smo severnoameriški pristop. Rajhenavski Rog meri 51,14 ha, za analizo smo izbrali južni del Roga (14,6 ha). Raziskavo smo opravili leta 2004 in odkrili 44 vrzeli ter 322 vrzelnikov. Prevladujejo srednje velike vrzeli, ki večinoma nastanejo kot posledica endogenih motenj. Pogled v zgodovino vrzeli kaže na večkratno širjenje vrzeli in njihov nepretrgan razvoj. Analiza je pokazala, daima največ vrzeli 3, 4 ali 5 vrzelnikov, stanje pragozda pa je v razvoju bukovega gozda, saj delež jelke med vrzelniki narašča. Pomlajevanje poteka malopovršinsko v jedrih, kjer rastni prostor izrablja bukev. Razvojna dinamikavrzeli povzroča nastanek malopovršinsko heterogenih sestojev. Metodologija, ki smo jo uporabili je primerna, njena objektivnost je večja kotpri metodi razvojnih faz. Potrebna je le prilagoditev dela na terenu. Načinobnavljanja v pragozdu je stabilen, zato je prenos znanja v gospodarske gozdove zaželjen.The purpose of the paper was to study the stand dynamics and regeneration patterns in the virgin forest Rajhenavski Rog, and to carry out a terrestrial analysis of the gap. In order to do this, a North-American approach was used. The forest of Rajhenavski Rog measures 51,14 hathe analysis was carried out in the south part of Rog (14,6 ha). The research was done in 2004, whereby 44 gaps and 322 gapmakers were found. The majority of the gaps are medium-sized, which mostly arose as a consequence of endogenous disturbances. The history ofthe gaps shows their repeated widening and continuous development. The analysis showed that most of the gaps have 3, 4 or 5 gapmakers, and that the virgin forest is in its beech spreading stage, as the percentage of fir between the gapmakers is rising. Regeneration is small-scale in cores, where the growing space is used by the beech. The stand dynamics of the gaps cause the occurrence of small-scale heterogeneous stands. The methodology used turned out adequately, its objectivity is higher than with the method of development phases. What is necessary is to adjust work in the field. The virgin forest renewal mode is stable, which is connected to the need for transfer of knowledge into management forests