Aleš Kadunc (Author)

Abstract

Namen prispevka je ugotoviti povezave med kakovostjo bukovih dreves (Fagus sylvatica L.) oziroma sestojev in značilnostmi dreves, rastišč ter vplivom gojitvenih ukrepanj. Poseben poudarek je dan zakonitostim pojavljanja rdečega srca. V raziskavo smo zajeli 5.058 bukovih dreves s 27 lokacij oziroma 13 gozdnih združb. Vse drevje je bilo uvrščeno v kakovostne razrede, na vseh čelih sortimentov pa se je izmeril obseg rdečega srca. V analizi smo predvideli šest scenarijev cen gozdnih sortimentov in tri scenarije proizvodnih stroškov. Na nižjo verjetnost pojava srca oziroma manjši obseg le-tega lahko pomembno vplivamo z redčenji v zrelem obdobju sestojev, t.j. v debeljakih. Če je cilj čimvišja pridelava furnirske kakovosti, potem je potrebno najkvalitetnejše drevje posekati v 10. debelinski stopnji. Z redčenjem lahko povečamo delež furnirske kakovosti in delež hlodov za žago I. in II. razreda. Različni scenariji cen sortimentov in različni scenariji proizvodnih stroškov ne vplivajo močno na čas kulminacije povprečnega vrednostnega prirastka sestojev. Velik vpliv na vrednostno kulminacijo ima starost. Na nižjih bonitetah rastišč imamo izredno širok časovni razpon za izrabo vrednostnega prirastka sestojev. Na produktivnejših rastiščih, zlasti na apnenčasti matični podlagi pa odmiki od kulminacije vrednostnega prirastka sestoja hitro pomenijo večje izgube.

Keywords

bukev;Fagus sylvatica L.;sestoji;kakovostna struktura;vrednostni prirastek;rdeče srce;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije
UDC: 630*851
COBISS: 1767590 Link will open in a new window
ISSN: 0017-2723
Parent publication: Gozdarski vestnik
Views: 868
Downloads: 164
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Other data

Secondary language: English
Secondary title: ǂThe ǂquality and value of European beech roundwood (Fagus sylvatica L.) with special regard to red heartwood formation
Secondary abstract: The aim of the paper is to establish the relations between the quality of European beech (Fagus sylvatica L.) trees or stands and tree traits, site characteristics and the influences of silvicultural measures. Red heartwood formation and its impact on timber value are in the focus of the research. Altogether 5058 beech trees on 27 locations and on 13 site units were includedin the research. Each tree was classified into timber quality classes,on all log-fronts the extent of red heartwood was measured. In the analysis six scenarios of timber price lists and three scenarios of harvestingcosts were taken into consideration. With the use of thinnings of adequate intensity in the mature phase of the stands the probability of red heartwood formation and its extent are substantially lower. If our goal is maximum sliced veneer production, then trees of highest timber quality should be harvested when their dbh is between 45 and 50 cm. The result of thinnings are higher shares of sliced veneer timber and sawlog timber of first and second class in comparison with unthinned stands. Different timber price listsscenarios and different harvesting costs scenarios have a rather weak influence on the time of mean annual value stand increment culmination. By contrast the production period is strongly influenced by the age of trees or stands. On less productive sites there is a very wide time range when it is possible to utilize the mean annual value increment of the stands, while on more productive sites, particularly on limestone bedrock, delaying culminationof mean annual value increment of the stands relatively quickly leads to financial losses.
Secondary keywords: european beech;stand;quality structure;value increment;red heartwood;
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 355-376
Volume: ǂLetn. ǂ64
Issue: ǂšt. ǂ9
Chronology: 2006
ID: 1740352