20.500.12556/DiRROS-13797 Gostota lesa - metode določanja in pomen pri razvoju gozdno lesnega biogospodarstva Wood density - determination methods and importance in the development of the forest-based bioeconomy Gostota lesa je fizikalna lastnost, ki je enostavno določljiva in nakazuje na številne druge lastnosti lesa in s tem tudi na njegovo uporabnost v lesno-predelovalni industriji, gradbeništvu ali energetiki. Ker je odvisna od vlažnosti ter poroznosti, se v stroki pojavljajo različne definicije gostot lesa, med katerimi je največkrat uporabljena gostota lesa v absolutno suhem stanju. Namen prispevka je predstavitev različnih načinov določanja gostote lesa ter pomen hitrega in natančnega določanje tega parametra kakovosti pri razvoju gozdno lesnega biogospodarstva. V stroki obstaja več neposrednih in posrednih metod določanja gostote; najbolj običajen in razširjen je volumetrični pristop, sledi postopek ocenjevanja gostote s penetrometrom, rezistografom, visokofrekvenčno denzitometrijo, rentgenskimi žarki, infrardečo spektroskopijo ter mikrovalovi. Les je surovina, ki ji bo v prihodnosti pomen še naraščal, saj je ključna za razvoj trajnostnega biogospodarstva. Natančno in pravočasno določanje gostote lesa bo omogočalo ustrezno razporejanje in usmerjanje tokov te surovine med posameznimi konvencionalnimi in novimi sektorji (področji rabe) in posledično bolj učinkovito in trajnostno rabo. Wood density is an important physical property that can be easily measured and is closely related to many other wood properties. Furthermore, wood density is a good indicator of the usability and applicability of wood in the wood processing, construction and energy industries. Because it is strongly dependent on moisture content and porosity, there are various definitions of wood density in the literature, among which the density measured on the basis of dry matter and volume is the most commonly used. The aim of this paper is to present different methods for wood density determination and the importance of collecting such data for the development of the forest-based bioeconomy. In practice, there are several direct and indirect methods of density measurement; in addition to the most basic volumetric approach, the density of wood can be measured by penetrometer, resistograph, high frequency densitometry, X-rays, near infrared spectroscopy and microwaves. Wood will continue to grow in importance, as it is one of the key raw materials for the transition to a sustainable bioeconomy. The accurate and timely determination of wood density allows for the appropriate distribution and direction of flows of this raw material between individual conventional and new sectors (areas of use) and thus its more efficient and sustainable use. lastnosti lesa gostota lesa rezistograf penetrometer rentgenska denzitometrija visokofrekvenčna denzitometrija gozdno lesno biogospodarstvo wood properties wood density resistograph penetrometer X-ray densitometry high frequency densitometry forest-based bioeconomy true false true Slovenski jezik Angleški jezik Neznano 2021-03-28 11:33:35 2021-03-28 11:33:38 2022-08-19 03:36:47 0000-00-00 00:00:00 2021 0 0 str. 1-11 Vol. 124 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*812(045)=163.6 2335-3112 10.20315/ASetL.124.1 57394691 RAZ_Arnic_Domen_i2021.pdf RAZ_Arnic_Domen_i2021.pdf 1 BC15C909AE0EB494E12F836887255527 718d85bfb34e4ac5c6b9d482fa46b06b1ddc095af6d98cf7294a538be971efce 7849fd06-17b6-11ed-b6b8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=16894 https://doi.org/10.20315/ASetL.124.1 1 https://dirros.openscience.si/Dokument.php?lang=slv&id=16893 Gozdarski inštitut Slovenije Acta Silvae et Ligni 0 0 0