Raziskava redčenj bukovih sestojev v raziskovalnih objektih Pišece in Brezova reber

Saje, Robi (author), Pajk, Benjamin (author), Kadunc, Aleš (author), Bončina, Andrej (author)

Za raziskavo učinkov redčenja bukovih sestojev sta bila izbrana dva raziskovalna objekta (Pišece in Brezova reber), ki sta razdeljena na tri bloke, vsak pa obsega tri ploskve (vsaka meri 0,09 ha), katerim smo naključno določili obravnavo: klasično izbiralno redčenje (obravnava A), izbiralno redčenje s stalnimi izbranci (obravnava B) in brez ukrepanja (obravnava C). Najprej smo ugotovili ničelno stanje gozdnih sestojev, v sestojih z obravnavama A in B smo določili izbrance in odkazali drevje za posek. Na Brezovi rebri je bil merski prag DBH = 5 cm, Pišecah pa DBH = 10 cm. Na Brezovi rebri smo izmerili 3.759 dreves ha-1, v Pišecah pa 1.533 dreves ha-1. Lesna zaloga sestojev na Brezovi rebri je bila 40-179 m3 ha-1, temeljnica 20,9-32,5 m2 ha-1; v Pišecah pa 119-317 m3 ha-1 in 16,9-35,3 m2 ha-1. V sestojih z obravnavo A smo na Brezovi rebri izbrali v poprečju 467 izbrancev ha-1 in odkazali 1.276 konkurentov (28,4 % lesne zaloge), v Pišecah pa 274 izbrancev ha-1 in odkazali 530 konkurentov ha-1 (31,5 % lesne zaloge). V sestojih z obravnavo B smo v povprečju na Brezovi rebri izbrali 100 izbrancev ha-1 in odkazali 496 konkurentov ha-1 (17,9 % lesne zaloge), v Pišecah pa smo izbrali 89 izbrancev ha-1 in odkazali 326 konkurentov ha-1 (24,0 % lesne zaloge). S parametričnimi testi smo med obravnavama A in B ugotovili razlike v številu odkazanih dreves na izbranca in v deležu odkazanih dreves glede na celotni sestoj.

• Language: Slovenian
• Keywords: redčenje, nega gozdov, bukovi sestoji, raziskovalne ploskve
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije
• Year: 2013
• Number of pages: Str. 387-401
• Numbering: Letn. 71, št. 9
• PID: 20.500.12556/RUL-78232
• UDC: 630*24(045)=163.6
• ISSN on article: 0017-2723
• COBISS.SI-ID: 3742374
• Publication date in RUL: 30.12.2015

Record is a part of a journal

• Title: Gozdarski vestnik. slovenska strokovna revija za gozdarstvo
• Shortened title: Gozd. vestn.
• Publisher: Zveza gozdarskih društev Slovenije
• ISSN: 0017-2723
• COBISS.SI-ID: 3736834

Secondary language

• Language: English
• Title: Beech thinning experiment in the research objects Pišece and Brezova reber

Abstract

For the study of effects of beech stands thinning, two research sites (Pišece and Brezova reber) were selected and divided into three blocks, each block wasdivided into three plots (plot area 0.09 ha), which were randomly assigned to treatment: classical selective thinning (treatment A), selective thinning with fixed crop trees (treatment B) and control plots for natural development (treatment C). During the first measurements we established the stand parameters. In stands with A and B treatment we selected crop trees and their competitors for cut. Measurement limit was DBH = 5 cm in Brezova reber and DBH= 10 cm in Pišece. We registered 3.759 trees ha-1 in Brezova reber and 1.533 trees ha-1 in Pišece. Growing stock for stands in Brezova reber was from 40 to 179 m3 ha-1, basal area from 20.9 to 32.5 m2 ha-1, and in Pišece from 119 to 317 m3 ha-1 and from 16.9 to 35.3 m2 ha-1. In the stands with treatment A in Brezova reber we selected on average 467 crop trees ha-1and 1.276 competitors ha-1 were cut down (28.4 % of the growing stock); in stands in Pišece we selected 274 crop trees ha-1 and cut down 530 competitors ha-1 (31.5 % of the growing stock). In the stands with treatment B in Brezova reber, we selected on average 100 crop trees ha-1 and 496 competitors ha-1 were cut down (17.9 % of the growing stock); in Pišece we selected 89 crop trees ha-1 and cut down 326 competitors ha-1 (24.0 % of the growing stock). Using parametric tests, we found differences between the A and B treatments in the number of selected competitors per crop tree and in the share of the competitors in the total stand.