Analiza nasada tujerodnih drevesnih vrst na Boču

Lesičar, Mitja (author), Jarni, Kristjan (mentor), Roženbergar, Dušan (comentor)

Nasadi tujerodnih drevesnih vrst (TDV) v Sloveniji so bili osnovani že konec 19. stoletja. V nasadu TDV v arboretumu na Boču najdemo 23 različnih TDV. Namen dela je bil celostno analizirati nasad. S polno premerbo smo analizirali zgornji sloj, popis mladja smo izvedli na 12-ih naključno postavljenih ploskvah v 4-ih stratumih, arboretum smo posneli z brezpilotnim letalnikom za natančnejše karte in naredili presojo gozdnogojitvenih ciljev in predlagali ukrepe. Ugotovili smo, da je lesna zaloga nasada 290,2 m3/ha, v njej prevladujejo TDV (63,6 %), čeprav je gostota avtohtonih vrst večja (55,9 %), kar pomeni, da so drevesa TDV v povprečju debelejša in višja. V mladju prevladujejo avtohtone vrste, saj najdemo 34.375 osebkov mladja na ha avtohtonih in 10.000 osebkov na ha TDV. Med TDV se pomlajujejo samo velika jelka, rdeči hrast, nav. ameriška duglazija, kavkaški krilati oreškar in kavkaška smreka. Vse se pomlajujejo v bližini in večinoma pod zastorom semenskih dreves. Na odprtih površinah niso konkurenčne domačim vrstam mladja ter bujnemu zeliščnemu in grmovnemu sloju. V presoji gozdnogojitvenih ciljev smo predlagali razglasitev nasada kot gozd s posebnim namenom z načrtovanim ukrepom (GPN), saj ima izredno poudarjeno poučno in raziskovalno funkcije. V njem bo potrebno adaptivno in aktivno upravljanje, če želimo ohraniti TDV, saj njihova reprodukcijska sposobnost ne zagotavlja obnavljanja populacije, ki bo potrebna zaradi slabše vitalnosti nekaterih TDV.

• Language: Slovenian
• Keywords: nasad tujerodnih drevesnih vrst, arboretum Boč, pomlajevanje
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [M. Lesičar]
• Year: 2023
• PID: 20.500.12556/RUL-150972
• UDC: 630*23+630*18(043.2)=163.6
• COBISS.SI-ID: 165975811
• Publication date in RUL: 26.09.2023

LESIČAR, Mitja, 2023, Analiza nasada tujerodnih drevesnih vrst na Boču [online]. Master’s thesis. M. Lesičar. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=150972

Secondary language

• Language: English
• Title: Analysis of non-native tree species plantation on Boč

Abstract

Plantations of non-native tree species (TDV) in Slovenia were established at the end of the 19th century. There are 23 TDVs in the TDV plantation in the Boč arboretum. The purpose of the research was to comprehensively analyze the plantation. We analyzed the top layer with a full survey, we carried out a census of tree seedlings and saplings on 12 randomly placed plots in 4 stratums, we photographed the arboretum with a drone for more accurate maps and made an assessment of silvicultural goals and proposed forest measures. We found that the growing stock of the plantation is 290.2 m3/ha and is dominated by TDV (63.6%), although the density of native species is higher (55.9%), which means that TDV trees are on average thicker and higher. The regeneration density of domestic species was 34,375 per ha and the density of TDV 10,000 per ha. Out of all TDV, only large firs, red oaks, American Douglas fir, Caucasian winged nutcracker and Caucasian spruce are regenerating. They are regenerating near and mostly under the canopy of seed trees. In open areas, they are not competitive against native saplings and the lush herbaceous and shrub layer. In the assessment of forestry silvicultural goals, we proposed declaring the plantation as a special purpose forest with a planned measure (GPN), as it has extremely emphasized educational and research functions. In it, adaptive and active management will be necessary if we want to preserve TDV, since their reproductive capacity does not guarantee the renewal of the population which will be necessary due to the worse vitality of some TDV.

• Keywords: plantation of non-native tree species, arboretum Boč, regenaration