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Query: "author" (Luka Krajnc) .

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Razvoj in uporaba simulatorja razvoja gozdov MLFS za analizo bodočih stanj slovenskih gozdov
Jernej Jevšenak, Domen Arnič, Luka Krajnc, Peter Prislan, Mitja Skudnik, 2023, published scientific conference contribution abstract

Keywords: simulator razvoja gozdov, napovedovanje stanja gozda
Published in DiRROS: 04.10.2023; Views: 144; Downloads: 31
.pdf Full text (102,17 KB)

3.
Analiza kakovostne strukture okroglega lesa listavcev
Luka Krajnc, Domen Arnič, Peter Prislan, 2023, original scientific article

Abstract: The research presented in this study addressed the distribution of volume across different log grades in three hardwood species: European beech (Fagus sylvatica L.), sycamore maple (Acer pseudoplatanus L.) and English oak (Quercus robur L.). Standing trees were selected, marked, and measured. Afterwards the trees were felled and bucked into assortments according to national legislation regarding assortment grades and requirements for each assortment grade. Each individual assortment was measured and classified into one of the national log quality grades. Proportions of log volume with different grades within individual tree volumes were calculated and presented in this study. Differences were found in log grade volume distribution between different species and diameter classes. By following the national grading system for assortments, between 40% and 50% of total volume will be usable assortments in hardwoods
Keywords: logs, hardwoods, volume, quality, log grading
Published in DiRROS: 03.08.2023; Views: 172; Downloads: 88
.pdf Full text (5,01 MB)
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Podlaga za izdelavo usmeritev pri gospodarjenju z navadno smreko v Sloveniji
Luka Krajnc, Mitja Skudnik, Tom Levanič, Matjaž Čater, Aleksander Marinšek, Janez Zafran, 2022, original scientific article

Abstract: V prispevku predstavimo podlago za izdelavo usmeritev pri gospodarjenju z navadno smreko v Sloveniji. Izvedli smo več ločenih analiz z istim ciljem: pripraviti strokovno utemeljene in s podatki podprte usmeritve za gospodarjenje z navadno smreko v Sloveniji v prihodnjih desetletjih. Tako smo v tem prispevku združili rezultate meritev nacionalne gozdne inventure, analizo priraščanja smreke, analize vrstne pestrosti ter pregled osnutkov načrtov za gozdnogospodarska območja. Namen tega prispevka je predstavitev rezultatov štirih ločenih sklopov analiz podatkov, ki so predstavljali osnovo za izdelavo usmeritev pri gospodarjenju z navadno smreko, objavljenih v naslednjem prispevku.
Keywords: navadna smreka, podnebne spremembe, gospodarjenje
Published in DiRROS: 20.02.2023; Views: 365; Downloads: 102
.pdf Full text (1,42 MB)

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Tree rings, wood density and climate–growth relationships of four Douglas-fir provenances in sub-Mediterranean Slovenia
Luka Krajnc, Jožica Gričar, Jernej Jevšenak, Polona Hafner, Robert Brus, 2022, original scientific article

Abstract: Tree rings, wood density and the climate–growth relationship of four Douglas-fir provenances were analysed separately for the juvenile and adult phases. Four provenances were selected from an existing IUFRO provenance trial planted in 1971 based on their diameter at breast height and vitality. Increment cores were extracted from individual trees, on which we measured tree-ring widths (RW), earlywood widths (EWW) and latewood widths (LWW). Wood density was assessed in standing trees using resistance drilling. The climate–growth correlations were calculated between provenance chronologies of RW, EWW, LWW and latewood share, and the day-wise aggregated Standardised Precipitation-Evapotranspiration Index (SPEI). The analysis was done separately for the juvenile and mature phases of growth. Provenances 1064 (Jefferson) and 1080 (Yelm) exhibited larger annual radial increments than provenances 1028 (Merrit) and 1089 (Cathlamet). The two provenances with the highest annual radial increment in the juvenile phase did not exhibit the same trend in the adult phase. In all provenances, RW, and consequently EWW and LWW, were wider in the juvenile than in adult phase. The share of latewood was in all cases higher in juvenile wood than in mature wood. All four provenances had similar wood densities in both analyzed growth phases. Our analysis showed that when selecting the most promising provenance for planting, possible changes in relative growth rate from the juvenile to adult phase need to be considered.
Keywords: Pseudotsuga menziesii, SPEI, juvenile phase, adult phase, latewood share, resistance drilling
Published in DiRROS: 21.11.2022; Views: 342; Downloads: 70
.pdf Full text (3,07 MB)
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Prva licitacija vrednejše hlodovine iz gozdov v lasti RS
Peter Prislan, Luka Krajnc, Božidar Lovro Birkić, 2021, professional article

Keywords: Slovenija, cene lesa, hlodovina, licitacija, dražba
Published in DiRROS: 12.11.2022; Views: 321; Downloads: 87
.pdf Full text (3,92 MB)

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