diplomski projekt
Mitja Bregar (Author), Franc Pohleven (Reviewer), Miha Humar (Mentor)

Abstract

Kostanjevino uvrščamo med najbolj naravno odporne slovenske lesne vrste. V literaturi zasledimo, da je najpomembnejši dejavnik naravne odpornosti kostanjevine vsebnost velikega deleža ekstraktivnih snovi. V diplomski nalogi smo želeli raziskati, kakšna je naravna odpornost kostanjevine proti lesnim glivam. Z namenom odgovoriti na to vprašanje, smo vzorce dimenzij 1 cm x 1,5 cm x 4 cm izdelali iz jedrovine pravega kostanja in jih nato izpostavili sedmimi glivami razkrojevalk lesa: navadni tramovki, beli hišni gobi, zimskemu ostrigarju, dlakavi slojevki, pahljačici, ogljeni kroglici in svetlikavi pološčenki. Glivam razkrojevalkam smo za primerjavo izpostavili tudi kontrolne vzorce bukovine in smrekovine. Izgubo mase in vlažnosti po dvanajstih tednih smo določili gravimetrično. Ugotovili smo, da so vzorci jedrovine pravega kostanja povsem odporni proti glivam razkrojevalkam, saj je izguba mase, zaradi delovanja najbolj aktivne glive, nižja od 5 %. Ta podatek kostanjevino uvršča med najbolj odporne lesne vrste - v prvi odpornostni razred

Keywords

les;kostanj;naravna odpornost;glive razkrojevalke;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Bregar]
UDC: 630*841
COBISS: 2478473 Link will open in a new window
Views: 301
Downloads: 56
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Other data

Secondary language: English
Secondary title: Resistance of chestnut heartwood in against wood decay fungi
Secondary abstract: Chestnut wood is one of the most naturally durable Slovenian wood species. According to literature data, the most important factor of chestnut's natural durability is the fact that it contains a high portion of biologically active extractives. In this thesis we wanted to explore the natural durability of sweet chestnut against wood decay fungi. In order to do elucidate this property, samples from the heartwood of sweet chestnut (Castanea sativa), of the following dimensions (1 cm x 1.5 cm x 4 cm) were prepared, and exposed to seven different wood decaying fungi, namely the brown rot fungus (Gloeophyllum trabeum), the white pore fungus (Antrodia vaillantii), the oyster fungus (Pleurotus ostreatus), the hairy curtain crust fungus (Stéreum hirsútum), the split gill fungus (Schizophyllum commune), the red cushion hypoxylon fungus (Hypoxylon fragiforme), and the lingzhi or reishi fungus (Ganoderma lucidum). In order to make a comparison, control samples from beech wood and Norway spruce wood were prepared and exposed to the same wood decaying fungi. After twelve weeks of exposure mass loss and moisture content was gravimetrically determined. We have established that the samples from the heartwood of sweet chestnut are completely resistant to wood decaying fungi since the loss of mass as a result of decay the most severe fungi was lower than 5 %. This result clearly supports the classification of chestnut wood into the first durability class, and prove it to be one of the most resistant wood species
Secondary keywords: wood;sweet chestnut;natural durability;wood decay fungi;
Type (COBISS): Diploma project paper
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: X, 34 f.
ID: 11915336