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Iskalni niz: "avtor" (Luka Krajnc) .

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1.
Analiza strukturnih in mehanskih lastnostih vhodne surovine z vidika kakovosti lesa : rojekt REWINNUSE
Luka Krajnc, Polona Hafner, Jožica Gričar, 2024, končno poročilo o rezultatih raziskav

Ključne besede: anatomija lesa, kakovost lesa, strukturne lastnosti lesa, mehanske lastnosti lesa
Objavljeno v DiRROS: 08.07.2024; Ogledov: 57; Prenosov: 17
.pdf Celotno besedilo (6,58 MB)
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How beech provenance affects the structure of secondary xylem, leaf traits, and the ectomycorrhizal community under optimal growth conditions
Tanja Mrak, Jožica Gričar, Tina Unuk Nahberger, Gregor Božič, Luka Krajnc, Peter Prislan, Domen Arnič, Tom Levanič, Hojka Kraigher, 2024, izvirni znanstveni članek

Povzetek: Beyond growth parameters and drought tolerance, comparatively little is known about the functioning of different beech (Fagus sylvatica L.) provenances. We investigated properties of leaves, stem secondary xylem, and ectomycorrhiza (ECM), and explored their interdependencies to identify the best performing beech provenance in optimal growth conditions. The study was conducted on 23-year-old trees in a provenance trial. The investigated provenances originated from Atlantic (Belgium—BE), Alpine (Italy—IT, Slovenia—SI), and continental climates (the Czech Republic—CZ). A significant effect of provenance was observed for stem vessel diameters and conductive area, as well as for foliar %C, δ13C, δ15N, and δ18O. δ13C as a proxy of intrinsic water use efficiency (iWUE) showed that the highest iWUE was achieved in BE provenance. Individuals with a better iWUE had wider growth rings regardless of provenance. Better iWUE was associated with lower specific leaf area (SLA). ECM community composition and diversity indices did not differ significantly among the provenances. Specific ECM taxa were associated with individuals with high SLA, δ13C, δ15N, and δ18O. In optimal growth conditions with no stress events, BE is a promising provenance due to an efficient water conducting system with high vessel diameters and conductive area, and high iWUE, while Alpine provenances showed an adaptation of their water conducting system to freezing conditions at their original locations. Integrating findings from different compartments improves our understanding of functioning of different beech provenances.
Ključne besede: Fagus sylvatica, provenance trial, stable isotopes, specific leaf area, xylem vessels, ectomycorrhizal fungi
Objavljeno v DiRROS: 19.04.2024; Ogledov: 295; Prenosov: 716
.pdf Celotno besedilo (2,11 MB)
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Analiza ohranjenosti nosilnosti lesenih stropnikov v Zoisovem gradu, Grajska ulica 14, 4264 Bohinjska Bistrica
Luka Krajnc, Peter Prislan, 2023, izvedensko mnenje, arbitražna odločba

Ključne besede: gostota, nosilnost, les
Objavljeno v DiRROS: 08.12.2023; Ogledov: 463; Prenosov: 0

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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, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: simulator razvoja gozdov, napovedovanje stanja gozda
Objavljeno v DiRROS: 04.10.2023; Ogledov: 470; Prenosov: 137
.pdf Celotno besedilo (102,17 KB)

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Analiza kakovostne strukture okroglega lesa listavcev
Luka Krajnc, Domen Arnič, Peter Prislan, 2023, izvirni znanstveni članek

Povzetek: 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
Ključne besede: logs, hardwoods, volume, quality, log grading
Objavljeno v DiRROS: 03.08.2023; Ogledov: 405; Prenosov: 237
.pdf Celotno besedilo (5,01 MB)
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