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Variabilnost dimenzij in deležev trahej v datiranih branikah bukve z dveh rastišč : diplomsko delo - visokošolski strokovni študij = Variability of dimensions and proportions of vessels in dated tree-rings of beech from two sites : graduation thesis - higher professional studiesPetric, MatejV lesu odraslih bukev (Fagus sylvatica L.) z 2 rastišč, Panške reke (PR) pri Ljubljani in Menine planine (MP), smo v branikah, nastalih v letih 2006, 2008 in 2009 raziskali variabilnost dimenzij ... trahej. Na slikah mikroskopskih preparatov prečnih prerezov smo branike od ranega proti kasnem lesu razdelili na pasove po metodi premikajočih se oken, braniko 2006 PR pa tudi po metodi tedenskih prirastkov, ki smo jih določili s pomočjo Gompertzove funkcije iz predhodne študije nastajanja lesa. S pomočjo programa za analizo slike smo v vsakem oknu izmerili minimalni premer, maksimalni premer, obseg in površino vseh trahej ter število trahej na enoto površine. Površina in minimalni premer trahej sta bila najbolj relevantna za izdelavo trahejogramov za ovrednotenje variabilnosti dimenzij trahej po braniki. V branikah 2006 in 2009 PR so površine trahej v prvih 70 % branike le počasi upadale, nato pa se je trend upadanja naglo povečal, v braniki 2008 PR pa je bilo zmanjševanje trahej vidno že na približno polovici branike. Braniki 2008 in 2009 MP sta imeli podobno širino in primerljivo zgradbo s postopnim zmanjševanjem površin trahej. Kasni les je večinoma predstavljalo zadnjih 20 % branike. Število trahej na enoto površine je bilo po branikah razmeroma konstantno, le v zaključnem delu večine branik smo opazili rahlo zmanjšanje števila trahej. Z metodo premikajočih se oken smo prikazali variiranje dimenzij trahej z oddaljenostjo od letnice. Z metodo tedenskih prirastkov smo ugotovili kakšne dimenzije so imele traheje, ki so nastale v določenem času. To metodo lahko uporabimo le v branikah, za katere poznamo dinamiko nastanka, ki jo pridobimo v zamudnih študijah nastajanja lesa.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Petric], 2011Language - slovenianCOBISS.SI-ID - 1875849
Author
Petric, Matej
Other authors
Čufar, Katarina |
Gorišek, Željko
Topics
les |
bukev |
Fagus sylvatica L. |
traheje |
analiza slike |
histometrija |
wood |
beech |
Fagus sylvatica L. |
vessels |
image analysis |
histometry
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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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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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Petric, Matej | ![]() |
Čufar, Katarina | 02937 |
Gorišek, Željko | 05732 |
Source: Personal bibliographies
and: SICRIS
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