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Določanje stopnje razkrojenosti bukovega lesa, poškodovanega v žledolomu : diplomski projekt = Determination of the rate of disintegration of beech wood injured in the sleet : B. Sc. thesisKumše, DamjanLes je odličen material, saj ima glede na svojo gostoto dobre mehanske lastnosti. Ker nekatere lesne vrste niso naravno odporne, ob neprimerni uporabi ali skladiščenju pogosto pride do neželenega ... razkroja. Bukov les je trd in trden, žal pa ima slabo naravno odpornost. V začetku leta 2014 je slovenske gozdove prizadel žledolom, ki je poškodoval veliko bukovih dreves, ter pospešil propadanje lesne zaloge v gozdovih. Cilj raziskave je bil ugotoviti, če se bukovini po enem letu ležanja v gozdu po žledolomu poslabšajo mehanske lastnosti zaradi delovanja gliv razkrojevalk. Vzorce smo izrezali iz štirih podrtih dreves, preverili njihovo tlačno in upogibno trdnost in jim izmerili gostoto ter določili vizualno oceno razkrojenosti. Ugotovili smo, da ni tesne povezave med vizualno oceno razkroja in mehanskimi lastnostmi z izjemo upogibne trdnosti, kjer smo pri vzorcih, ocenjenih kot razkrojenih izmerili nižjo upogibno trdnost in nižji modul elastičnosti. Tlačna trdnost narašča z naraščanjem gostote lesa, enako velja tudi za upogibno trdnosti in upogibni modul elastičnosti. Variacije v mehanskih lastnostih znotraj posameznega drevesa so bile enakega velikostnega razreda kot variacije med različnimi drevesi. Pri spodnjih delih kolutov smo izmerili nižjo tlačno trdnost, nižjo upogibno trdnost in nižji modul elastičnosti, kar nakazuje, da je prišlo do prvih znakov razkroja, ki pa jih s prostim očesom ne moremo zaznati. Raziskovalno hipotezo smo potrdili, in sicer eno leto ležanja podrtih dreves bukve skupaj s koreninskim sistemom v gozdu bistveno ne poslabša mehanskih lastnosti lesaType of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [D. Kumše], 2015Language - slovenianCOBISS.SI-ID - 2432137
Author
Kumše, Damjan
Other authors
Humar, Miha |
Thaler, Nejc |
Čufar, Katarina
Topics
glive razkrojevalke lesa |
razkroj lesa |
mehanske lastnosti |
žledolom |
wood decay fungi |
wood degradation |
mechanical properties |
beech wood
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Shelf entry
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kumše, Damjan | |
Humar, Miha | 19106 |
Thaler, Nejc | 33176 |
Čufar, Katarina | 02937 |
Source: Personal bibliographies
and: SICRIS
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