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Variabilnost gostote lesa debla, vej in korenin jelk s snežniškega območja : diplomsko delo - visokošolski strokovni študij
Martinčič, Andrej (Author), Oven, Primož (Mentor) More about this mentor... This link opens in a new window, Simončič, Primož (Co-mentor), Gorišek, Željko (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/vs_martincic_andrej.pdf New window

Abstract
Raziskovali smo variabilnost gostote znotraj drevesa in med posameznimi drevesi na istem rastišču območja Snežnika. Raziskava je temeljila na 19 drevesih jelke, ki jih je jeseni leta 2008 izruval vetrolom. Iz kolutov debel, vej in korenin smo izžagali radialne vzorce, jih razsekali na 2059 testnih vzorcev nepravilnih oblik, sušili na 103 °C do absolutno suhega stanja in nato tehtali na laboratorijski tehtnici. Vzorce smo v impregnacijski komori impregnirali z vodo. Maksimalno napojene smo potapljali v merilni valj in jim merili volumne. Natančnost meritev smo preverili še z Breuilovim živosrebrovim volumometrom. Ugotovili smo, da ima največjo povprečno osnovno gostoto les vej (595 kg/m3), zatem les debel (394 kg/m3), najmanjšo pa koreninski les (365 kg/m3). Največja povprečna osnovna gostota lesa debel je 509 kg/m3 najmanjša 343 kg/m3; to nakazuje na veliko variabilnost gostote na tem rastišču.

Language:Slovenian
Keywords:navadna jelka, Abies alba, osnovna gostota, les, veje, deblo, korenine
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2010
Publisher:[A. Martinčič]
Number of pages:IX, 48 f.
Place:Ljubljana
UDC:630*811
COBISS.SI-ID:1838729 Link is opened in a new window
Views:495
Downloads:132
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Secondary language

Language:English
Abstract:
Variability of wood density inside the trees and among individual trees of Snežnik area was researched. 19 fir trees uprooted by strong winds in autumn 2008 were investigated. Radial samples were sawn out from the discs of trunks, branches and roots, cut into 2059 irregularly shaped test samples, and dried at temperature of 103 °C. When absolutely dry, they were weighed with laboratory scales. Then the samples were impregnated with water in the impregnation chamber. Fully waterlogged samples were sunk into a measuring cylinder filled with water, then their volume was measured. The accuracy of these measurements was checked with Breuil's mercury volumenometer. It was ascertained that branch wood had the highest average density (595 kg/m3), followed by trunk wood with 394 kg/m3. Root wood had the lowest average density (365 kg/m3). The highest average basic density of trunk wood was 509 kg/m3, and the lowest 343 kg/m3, indicating high variability of wood density in this area.

Keywords:fir, Abies alba, basic density, wood, branches, trunk, roots

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