Tehnološke lastnosti in uporabnost lesa velikega pajesena v primerjavi z lesom velikega jesena

Gorišek, Željko (author), Plavčak, Denis (author), Straže, Aleš (author), Merela, Maks (author)

Veliki pajesen (Ailanthus altissima (Mill.) Swingle)) spada med najbolj invazivne tujerodne drevesne vrste v Evropi in pri nas. Zaradi velike obnovitvene moči se hitro širi, predvsem na golosekih, na opuščenih kmetijskih površinah ter ob prometnih poteh. Botanično se razlikuje od velikega jesena (Fraxinus excelsior L.), sicer pa nanj značilno spominja z izgledom drevesa kot tudi s strukturnimi lastnostmi lesa. Zaradi tega smo primerjalno analizirali vizualne, anatomske in nekatere fizikalne ter mehanske lastnosti obeh lesnih vrst. V vseh anatomskih ravninah smo potrdili značilno vizualno in barvnometrično podobnost obeh proučevanih lesov. Anatomsko se raziskani venčasto porozni lesni vrsti razlikujeta predvsem v velikosti in razporedu trahej ter parenhimskega tkiva. Lesova imata podobni gostoti, pajesen pa je bolj dimenzijsko nestabilen. Mehanske lastnosti lesa pajesena so le nekoliko slabše od tistih pri lesu velikega jesena. Določili pa smo 20 % manjšo upogibno togost ter povprečno 50 % nižjo trdoto lesa pajesena v primerjavi z lesom velikega jesena. Nasprotno pa je bila strižna trdnost pri pajesenu 30 % višja. Glede na ugotovljene lastnosti je les pajesena uporaben za predelavo v celulozo in papir, razne lesne plošče in delno za manj obremenjene konstrukcije, ki niso izpostavljene drastičnim klimatskim razmeram.

• Language: Slovenian
• Keywords: les, veliki pajesen, Ailanthus altissima, veliki jesen, Fraxinus excelsior, anatomija lesa, fizikalne lastnosti, mehanske lastnosti, uporaba
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2018
• Number of pages: Str. 29-44
• Numbering: Letn. 67, št. 2
• PID: 20.500.12556/RUL-126666
• UDC: 630*812:630*181.1:176.1 Ailanthus altissima
• ISSN on article: 0024-1067
• COBISS.SI-ID: 2993545
• Publication date in RUL: 30.04.2021

GORIŠEK, Željko, PLAVČAK, Denis, STRAŽE, Aleš and MERELA, Maks, 2018, Tehnološke lastnosti in uporabnost lesa velikega pajesena v primerjavi z lesom velikega jesena. Les [online]. 2018. Vol. 67, no. 2, p. 29–44. [Accessed 18 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=126666

Record is a part of a journal

• Title: Les
• Shortened title: Les
• Publisher: Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze
• ISSN: 0024-1067
• COBISS.SI-ID: 13940224

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 30.04.2021

Secondary language

• Language: English
• Title: Technological properties and usability of Chinese sumac wood in comparison with ash wood

Abstract

Chinese sumac (Ailanthus altissima (Mill.) Swingle) is one of the most invasive alien species in Europe, and also in Slovenia. Due to its great renewal power the species is spreading rapidly, especially in abandoned agricultural and forest areas and along the traffic routes. It is botanically different from the European ash (Fraxinus excelsior L.), but it has similar tree habitus as well as similar structural characteristics of the wood. For this reason, we analysed the visual, anatomical and some physical and mechanical properties of both wood species. In all anatomical planes, the typical visual and colorimetric similarity of both studied woods was confirmed. Anatomically both ring porous wood species differ mainly in size and distribution of vessels, axial parenchyma and ray tissue. Wood of both species has a similar density as well, but the Chinese sumac has greater shrinkage. Some of the mechanical properties are comparable, although Chinese sumac wood has a lower modulus of elasticity and hardness and greater shear strength than ash wood. We can recommend that the wood of Chinese sumac can be used for production of pulp and paper, various panels and partly for less loaded constructions, which are not exposed to drastic climatic variability.

• Keywords: Chinese sumac, wood, European ash, wood anatomy, physical propertes, mechanical propertes, use

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0015
• Name: Les in lignocelulozni kompoziti