Odpornost lesa cemprina na glive razkrojevalke

diplomsko delo

Andrej Kodele (Author), Boštjan Lesar (Reviewer), Miha Humar (Mentor), Nejc Thaler (Co-mentor)

Abstract

Cemprin je bil v zadnjem obdobju deležen velike pozornosti, v našem okolju pa še ni povsem uveljavljen. Ker je zanimanje za les cemprina vedno večje, smo se odločili, da raziščemo njegovo odpornost proti glivam. Odpornost je lastnost izjemnega pomena, saj če ima les vse pozitivne lastnosti razen ustrezne odpornosti, ga ne moremo uporabiti na prostem. V ta namen smo les cemprina izpostavili trem različnim glivam. Poskus smo izvedli tako, da smo iz dveh plohov cemprina najprej izžagali po 4 skupine preizkušancev. Ena skupina je bila iz beljave, ostale tri pa iz različno stare jedrovine. Iz vsake skupine smo vzeli 5 vzorcev za ekstrakcijo, nato pa smo skupine še prepolovili in jih polovico umetno starali, preden smo jih izpostavili glivam. Med vsako operacijo smo vzorcem določili maso in tako dobili podatke za izračun želenih informacij. Po končanih testiranjih smo obdelali podatke in ugotovili, da ima cemprin kljub velikemu deležu ekstraktivov v lesu slabo odpornost na glive razkrojevalke. Umetno staranje lesa cemprina bistveno ne vpliva na odpornost. Glede na rezultate testiranja smo les cemprina uvrstili v 4. razred odpornosti, med manj odporne lesne vrste in ga lahko primerjamo s smrekovino.

Keywords

cemprin;naravna odpornost;voda;les;zaščita lesa;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[A. Kodele]
UDC:	630*844.4
COBISS:	3006857
Views:	552
Downloads:	152
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Durability of Pinus cembra wood against wood decay fungi
Secondary abstract:	Pinus cembra is getting more and more popular every day, whereas in our region it is still not that well established. As the interest for the use of this wood is growing bigger, we decided to make a research about its resistance to fungal decay. The resistance is a characteristic of great value, because having all the characteristics but lacking suitable resistance, the wood cannot be used outdoors. For this purpose we exposed Pinus cembra wood to three different fungi. The test was made by sawing two boards into four groups of specimens. One group consisting of sapwood, another three of heartwood of different ages. After we had chosen five samples for extraction from each group, we divided the groups and aged half of them artificially, the other half remained unaged. Finally we exposed them to fungi. During all these procedures the mass of samples was determined in order to get the necessary data for the following research. After testing the data was analysed and we concluded that Pinus cembra, in spite of high share of extractives, possesses weak resistance to wood-decay fungi. Artificial aging of Pinus cembra does not affect significantly its resistance. According to the test results we classified the wood of Pinus cembra to the fourth resistance class, i.e. among less resistant wood species and it can be easily compared to spruce wood.
Secondary keywords:	Pinus cembra;natural durability;water;wood;wood protection;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages:	VIII, 32 f.
ID:	11031160