diplomsko delo - univerzitetni študij - 1. stopnja
Ignac Skala (Author), Matija Klopčič (Mentor)

Abstract

V diplomski nalogi smo želeli analizirati učinke klasičnega izbiralnega in situacijskega redčenja s končnimi izbranci, ki se najpogosteje izvajata v čistih bukovih sestojih. Primerjali smo razlike v njunih učinkih na posamezna drevesa in sestoj. Na Brezovi Rebri pri Novem mestu smo opravili drugo zaporedno polno premerbo na devetih raziskovalnih ploskvah, nato pa izvedli še odkazilo, skladno z načinom redčenja na posamezni ploskvi. Vsem drevesom na ploskvah smo pred začetkom rastne sezone leta 2019 izmerili premer, določili še ostale parametre, izbranim drevesom pa smo izmerili tudi višino. Izračunali smo osnovne kazalce sestojne zgradbe in sestave, med drugim SDI indeks, spremljali njihove spremembe med obema meritvama in jih primerjali med tremi različnimi načini tretiranja sestojev (skupaj s kontrolnim sestojem brez ukrepanja). Analizirali smo tudi jakost odkazila. Povprečni debelinski in volumenski prirastek vseh dreves sta bila največja pri klasičnem izbiralnem redčenju, prirastki izbrancev pa so bili največji pri situacijskem redčenju. Volumenski prirastek sestoja je bil občutno večji na ploskvah s klasičnim izbiralnim redčenjem kot na ploskvah s situacijskim redčenjem, najnižji pa na kontrolnih ploskvah, kar lahko pripišemo učinku rastnega pospeška v mladih in srednjedobnih sestojih. Jakost redčenja se je pri obeh načinih redčenja glede na prvo odkazilo močno znižala. Jakost glede na začetno lesno zalogo je bila višja pri klasičnem izbiralnem redčenju, jakost redčenja, izražena v konkurentih na izbranca, pa je bila večja pri situacijskem redčenju.

Keywords

izbiralno redčenje;situacijsko redčenje;debelinski prirastek;volumenski prirastek;bukovi sestoji;Brezova reber;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [I. Skala]
UDC: 630*24+630*22(497.4Brezova reber)(043.2)=163.6
COBISS: 113027587 Link will open in a new window
Views: 48
Downloads: 9
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Other data

Secondary language: English
Secondary title: ǂThe ǂinfluence of various thinning methods on growth of trees and European beech pole stage stands in the research site Brezova reber
Secondary abstract: In the thesis we wanted to analyze the effects of two thinning types, namely classical selective thinning and situational thinning with final crop trees, which are most often carried out in pure beech stands. We compared differences in the effects of thinning type on individual trees and stands. Therefore, we performed the second consecutive full survey on 9 research plots on the Brezova reber study site, and then performed also the harvesting in accordance with the thinning type on each plot. Before the 2019 growing season, we measured the dbh of all trees on plots, assessed some other tree parameters and measured height of selected trees. We calculated the basic indicators of stand structure and composition, including the SDI index, monitored their changes between the two measurements and compared them between three different treatments (also the control plot without intervention). The average diameter and volume increment of trees was the highest under the classical selective thinning, while the increments of crop trees were largest under the situational thinning. The stand volume increment was significantly higher on plots with applied classical selective thinning than on those with situational thinning; the lowest was on the control plots. This can be attributed to the effect of growth acceleration in young and middle-aged stands. The thinning intensity decreased significantly compared to the previous thinning. The thinning intensity in terms to stand volume was higher under the classical selective thinning, while the thinning intensity in terms of competitors per a crop tree was higher under the situational thinning.
Secondary keywords: thinning;types of thinning;beech stands;Brezova reber;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za gozdarstvo in obnovljive gozdne vire
Pages: VIII, 30 f.
ID: 15738841