20.500.12556/RUL-108548 Razširjenost, obilje in priraščanje nekaterih vrst iz rodu Sorbus v Idrijsko - Cerkljanskem hribovju Prevalence, abundance and growth of certain species of genus Sorbus in Idrijsko - Cerkljansko region V raziskavi smo analizirali 1) razširjenost in obilje drevesnih vrst iz rodu Sorbus v Idrijsko – Cerkljanskem hribovju in 2) prirastoslovne značilnosti mokovca (Sorbus aria Crantz) glede na socialni položaj drevesa. Za uresničitev prvega cilja smo na Zavodu za gozdove Slovenije pridobili podatke o gozdnih sestojih in podatke s stalnih vzorčnih ploskev za raziskovalno območje, za uresničitev drugega cilja pa smo izvedli debelne analize šestih mokovcev. Na raziskovalnem območju se izmed vrst rodu Sorbus pojavljata le jerebika (Sorbus aucuparia L.) in mokovec. Vrsti najdemo v sestojih, ki preraščajo 13 % površine raziskovalnega območja, v skupni lesni zalogi predstavljata 0,35 %. Mokovec v višino in debelino prirašča razmeroma počasi, se pa višinski prirastki glede na socialni položaj razlikujejo precej bolj kot debelinski in volumenski. Rezultati kažejo, da je mokovec kljub svetloljubnosti vrsta, ki je zmožna dalj časa rasti pod zastorom višjih dreves, kasneje pa odreagirati na njihovo izboljšanje s povečanim priraščanjem. Ker je mokovec toploljubna vrsta, je ta lastnost pomembna z vidika adaptacije gozdov na klimatske spremembe. Vrste iz rodu Sorbus so manjšinske vrste in pri negi potrebujejo izdatno pozornost, lahko pa jih ohranimo tudi pod zastorom, kjer predstavljajo nekakšno rezervo v polnilnem sloju. In the study we analyzed 1) the distribution and abundance of Sorbus species in Idrijsko – Cerkljansko montane region, and 2) growth characteristics of whitebeam (Sorbus aria Crantz) in relation to a social status of a tree. In order to achieve the first goal, Slovenian Forest Service provided us data on forest stands and permanent sample plots for our study area. The second goal was realized through carrying out trunk analyses of six whitebeam trees. In the study area only two Sorbus species are present, namely rowan (Sorbus aucuparia L.) and whitebeam. Both species are found in stands covering 13 % of the research area, representing only 0.35 % in the total growing stock. Whitebeam grows relatively slow in height and thickness. Height growth showed much more evident patterns related to social status of a tree than did the diameter and volume growth. The results showed that even though whitebeam is considered as a shade-intolerant species, it has the ability to grow slowly under the canopy waiting for improved light conditions and when they appear it can successfully react with increased height growth. Since whitebeam is a thermophilic species, this finding of our study is important in terms of adaptaiton of forests to climate changes. Sorbus species are minority species in the studied forests and wider and need special attention in silvicultural measures. However, they can also be maintained under the canopy as a lower storey of a stand. manjšinske drevesne vrste mokovec Sorbus aria višinska rast debelinska rast volumenska rast Idrijsko – Cerkljansko hribovje minority tree species whitebeam Sorbus aria height growth thickness growth volume growth Idrijsko – Cerkljansko montane region true false false [N. Vončina] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2019-07-06 07:45:20 2019-07-06 07:45:24 2022-08-20 03:47:05 0000-00-00 00:00:00 2019 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*56:630*17(043.2)=163.6 163991 5424294 7213.pdf 7213.pdf 1 EA41D63CCB89835E1C0B0E8E40AEB042 2ad4bc4f5731b473b98e52e0a44568c2df916b3f6004882c3099122bb007b1cb a977f8b1-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=119514 Biotehniška fakulteta 0 0 0