Razvoj in rast mešanega jelovo-bukovo-smrekovega prebiralnega gozda Volčji štant na Borovški gori

Jovanovič, Leja (avtor), Klopčič, Matija (mentor)

V raziskovalnem objektu Volčji štant na Borovški gori smo preučili razvoj in rast mešanega jelovo-bukovo-smrekovega gozda. Najprej smo izvedli ponovne terenske meritve objekta, kjer smo na 45 5-arskih krožnih ploskvah popisali izbrane parametre dreves. Sledila je obdelava podatkov, v kateri smo analizirali sestojne parametre, rast dreves in sestojev ter primerjali ukrepanje v letih 2007 in 2022. Kljub stalnemu spreminjanju gozdnega ekosistema in 15-letni odsotnosti aktivnega ukrepanja, je bila prebiralna zgradba leta 2022 še vedno ohranjena, vendar v primerjavi z letom 2007 nekoliko spremenjena. Lesna zaloga se je v tem obdobju povečala za približno 10 %, povečal se je delež debelega drevja. V lesni zalogi je največji delež predstavljala jelka (67 %), sledile so bukev (17 %), smreka (15 %) in ostale drevesne vrste (1 %). V tem obdobju se je povečal delež jelke (za 28 %) in smreke (za 20 %), zmanjšal pa delež bukve (za 31 %). Kljub dokaj uravnoteženi zgradbi prebiralnega gozda, je bila vrast dreves nizka in blizu kritične mejne vrednosti. Povprečni debelinski prirastek dreves je znašal 0,31 cm/leto, medtem ko je bil povprečni volumenski prirastek 0,04 m3/leto. Iglavci so imeli višje prirastke kot listavci. Leta 2007 je jakost poseka predstavljala 21 % lesne zaloge, leta 2022 pa le 11 % (volumen odkazanih dreves je bil 136 m3). V poseku 2007 in odkazilu 2022 je prevladovala bukev. Glede na naše rezultate bi morali povečati jakost poseka in zagotavljati uspešno vrast jelke, saj se bo le na takšen način tudi v bodoče ohranjala prebiralna struktura sestojev.

• Jezik: Slovenski jezik
• Ključne besede: Prebiralni gozd, drevesna rast, sestojna rast, prebiranje, Volčji štant
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: BF - Biotehniška fakulteta
• Založnik: [L. Jovanovič]
• Leto izida: 2023
• PID: 20.500.12556/RUL-147815
• UDK: 630*2(497.4Borovška gora)(043.2)=163.6
• COBISS.SI-ID: 158980867
• Datum objave v RUL: 13.07.2023

JOVANOVIČ, Leja, 2023, Razvoj in rast mešanega jelovo-bukovo-smrekovega prebiralnega gozda Volčji štant na Borovški gori [na spletu]. Magistrsko delo. L. Jovanovič. [Dostopano 25 april 2025]. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=147815

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Growth and development of mixed fir-beech-spruce single-tree selection forest Volčji štant on the Borovška gora Mountain

Izvleček

In the permanent study area Volčji štant on Borovška gora, the development and growth of a mixed silver fir-European beech-Norway spruce selection forest was studied. First, the second consecutive measurements of trees was conducted on 45 5-acre cicular samplings plots. Then, basic parameters of selection forest, trees and stand growth, were analyzed, and the intensity and structure of selection cutting performed in 2007 and 2022 was compared. Despite the constant changes in forest ecosystem and the 15-year absence of selection cut, the selection structure of analysed stands was still preserved in 2022, but compared to 2007 it changed slightly. The stand volume increased for about 10 % during this period, the share of large-sized trees (dbh>50 cm) increased. The highest share in stand volume was obtained for fir (67 %) and was followed by beech (17 %), spruce (15 %) and other tree species (1 %). In the period 2007-2022 the share of fir and spruce increased by 28 % and 20 %, respectively, while the share of beech decreased by 31 %. Despite the balanced diameter structure of selection forest, the recruitment of trees was low and close to the critical threshold value. The average diameter increment of trees was 0,31 cm/year, while the averagevvolume increment was 0,04 m3/year, higher increments were observed for conifers. In 2007 selection felling intensity was 21 % of the total stand volume, while only 11 % in 2022. In both years beech dominated among the harvested trees. The harvest intensity should have been increased to ensure the successful recruitment of fir, as only that would preserve the selection structure in the studied single-tree selection forest.

• Ključne besede: Selection forest, tree growth, stand growth, selection cutting, Volčji štant