Strukturne spremembe gozdov na območju Idrija II od začetka načrtnega gospodarjenja do danes : diplomsko delo - univerzitetni študij

Leskovec, David (avtor), Bončina, Andrej (mentor)

V diplomskem delu smo prikazali razvoj gozdov na ravni oddelkov v gozdnogospodarski enoti Idrija II od začetka načrtnega gospodarjenja do danes.Med seboj smo primerjali podatke iz načrtov za devet urejevalnih obdobijod leta 1879 do leta 1998. Z analizo smo po oddelkih spremljali razvoj drevesne sestave, sestojne zgradbe in lesne zaloge ter na ravni celotne enote še razvoj prirastka. V začetku je v večjem delu prevladovala bukev, do sredinestoletja pa je bukev v skupni lesni zalogi nazadovala zaradi povečanja deleža jelke, plemenitih listavcev in smreke. Delež jelke v skupni lesni zalogi je do konca 20. stoletja upadel, delež smreke in plemenitih listavcev pa se je povečal. Na spremembe drevesne sestave so vplivale velikopovršinske sečnje, ki so bile neugodne za pomlajevanje jelke ter so ugodno vplivale na pomlajevanje bukve in plemenitih listavcev. Delež drevesnih vrst v skupni lesni zalogi se je različno spreminjal v posameznih delih enote. Delež smreke se je povečal v visokogorskih bukovjih in smrekovjih v vzhodnem delu enote, delež jelke in plemenitih listavcev pa v dinarskih jelovo-bukovih gozdovih, gorskih ter acidofilnih bukovih gozdovih v zahodnem delu enote. Sestojna zgradba je bila v začetku obravnavanega obdobja v glavnem enomerna, v zadnjem obdobju pa prevladuje raznomerna zgradba, kar je posledica postopne spremembe načina gospodarjenja. V prvi polovici stoletja so bila večja nihanja v višini lesne zaloge, in sicer zaradi povečanih etatov in intenzivnejših sečenj tik pred prvo svetovno vojno, v drugi polovici preučevanega obdobja pa zaradi pogostih žledolomov in vetroloma.

• Jezik: Slovenski jezik
• Ključne besede: forest stands, development, tree species composition, stand structure, growing stock, forest management plan, Idrija
• Vrsta gradiva: Diplomsko delo
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: BF - Biotehniška fakulteta
• Kraj izida: Ljubljana
• Založnik: [D. Leskovec]
• Leto izida: 2008
• Št. strani: VIII, 69 str.
• PID: 20.500.12556/RUL-15518
• UDK: 630
• COBISS.SI-ID: 2187430
• Datum objave v RUL: 11.07.2014

Sekundarni jezik

• Jezik: Neznan jezik

Izvleček

In the diploma we presented the development of forests on the level of departments in Idrija II forest management unit from the beginning of forest planning till today. We compared the data from plans for nine regulative periods from the year 1879 to 1998. With the analysis we monitored the development of the tree structure, stand structure and wood stock in the departments, and the growth development on the level of the entire department.In the beginning beech tree had predominated in the major area. By the middle of the century the share of the beech tree had regressed in the joint wood stock, and the share of fir tree, noble deciduous trees and pine tree had increased. The factor that influenced the changes of tree structures was large-surface felling, which was disadvantageous for the rejuvenation of fir tree and had an advantageous influence on the rejuvenation of beech tree and noble deciduous trees. The share of tree species in the joint wood stock was changing differently in separate parts of the unit. The share of pine treeincreased in mountain forests of beech tree and pine tree in the eastern part of the unit, the share of fir tree and noble deciduous trees increased inthe dinaric alder and beech tree forests, mountain and acidophilic beech tree forests in the western part of the unit. In the beginning of the period dealt with, the stand structure had been mostly single-measured, but in the recent years many-measured structure is predominating; the reason for this being gradual change of forest planning. In the first half of the century the oscillation of the wood stock amount had been greater due to the increased annual clearing and intensified felling just before the First World War, and in the second half of the monitored period due to the frequent sleet and wind breaking.