Rebrasta tekstura v lesu gorskega javorja (Acer pseudoplatanus L.) : diplomsko delo - univerzitetni študij - 1.stopnja

Krajnc, Luka (author), Brus, Robert (mentor), Čufar, Katarina (comentor)

V diplomski nalogi so preučene splošne značilnosti pojava lesa gorskega javorja z rebrasto teksturo (ki je posledica valovitega poteka aksialnih elementov v lesu), vzrokih njenega nastanka, njen razpored znotraj debla ter morebitno geografsko pogojenost pojava dreves s tako teksturo v Sloveniji. Na vsakoletni licitaciji vrednejših sortimentov v Slovenj Gradcu so bili na sortimentih javorja z rebrasto teksturo na obodu sortimentov izmerjeni izraženi znaki rebratosti - širine, višine ter gostote valov. Narejena je bila presoja vpliva različnih dejavnikov na ceno sortimentov javorja z različnimi deleži rebraste teksture. Les z rebrasto teksturo sicer dosega visoko ceno, vendar prisotnost rebraste teksture sama po sebi še ne zagotavlja nadpovprečne cene lesa. Sortimenti z rebrasto teksturo, ki so dosegli podpovprečne in nadpovprečne cene so se med drugim razlikovali po večjem premeru, daljši dolžini in večji absolutni dolžini lesa z rebrasto teksturo. Na podlagi rezultatov raziskave ugotavljajo, da bi bilo smiselno podrobneje raziskati vpliv genetskih dejavnikov na pogostost in razpored rebraste teksture. Tako bi lahko bolje razumeli odnose med dejavniki, ki vplivajo na ceno ter dosegli maksimalen donos, upoštevajoč tudi pravočasni posek lesa. Na podlagi izdelanih geografskih kart relativnih gostot javorja sklepajo, da se drevesa z rebrasto teksturo enakomerno pojavljajo med drevesi brez nje in da pojav rebraste teksture ni geografsko omejen.

• Language: Slovenian
• Keywords: gorski javor, rebraš, les, rebrasta tekstura, valovit potek aksialnih elementov, licitacija
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [L. Krajnc]
• Year: 2013
• Number of pages: VIII, 30 str.
• PID: 20.500.12556/RUL-115131
• UDC: 630*81
• COBISS.SI-ID: 3716774
• Publication date in RUL: 14.04.2020

Secondary language

• Language: English
• Title: Fiddleback figure in wood of sycamore maple (Acer pseudoplatanus L.)

Abstract

In this graduation thesis general characteristics of the phenomenon of sycamore wood with fiddleback figure (also known as curly maple with wavy grain) have been explored, figure distribution within wood assortments and the potential geographic distribution of such wood with fiddleback figure in Slovenia. Impact of various factors (waves height, width and density) on the price of assortments on annual lumber auction in Slovenj Gradec has been assesed. Fiddleback figure in sycamore wood does not guarantee above-average price of wood. Based on results we also concluded that it would be reasonable to investigate the impact of genetic factors on auction achieved price to improve understanding of complex relationships between price influencing factors to achieve maximum value of sycamore wood with fiddleback texture, of course taking into account harvesting such assortments in time. Based on in ArcGis drawn maps of relative densities of the geographical origin of lumber assortments with or without fiddleback figure we concluded that trees with fiddleback figure are evenly distributed among sycamore trees without such figure. Results indicate that fiddleback figure in sycamore wood is not just alocalized phenomenon in Slovenia.