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52. Napredki v primarni predelavi lesa listavcevPeter Prislan, 2022, professional article Keywords: gozdarstvo, gozdovi, predelava lesa, listavci, topol, razžagovanje, žagarstvo, avtomatiziran proizvodni sistem Published in DiRROS: 22.02.2022; Views: 749; Downloads: 366 Full text (3,07 MB) |
53. Energetska storitev : energetsko pogodbeništvo : toplota namesto energentaNike Krajnc, Thomas Loibnegger, Peter Prislan, Marjan Dolenšek, Christian Metschina, 2014, professional monograph Keywords: energetika, učinkovita raba energije, varčevanje z energijo, lesna biomasa, ekonomika Published in DiRROS: 05.01.2022; Views: 861; Downloads: 278 Full text (4,98 MB) |
54. Kakovostna lesna goriva za vsakogar : koristne informacije za vse, ki se ogrevajo z lesomNike Krajnc, Mitja Piškur, Peter Prislan, Matevž Triplat, 2014, professional monograph Keywords: energetski viri, ogrevanje, drva, lesni sekanci, lesni peleti Published in DiRROS: 05.01.2022; Views: 1010; Downloads: 324 Full text (4,32 MB) |
55. Stanje žagarske panoge v Sloveniji v letu 2019Špela Ščap, Nike Krajnc, Peter Prislan, 2021, original scientific article Abstract: Z raziskavo, opravljeno v letu 2020, smo želeli ugotoviti stanje žagarske panoge v Sloveniji v letu 2019 (t.j. ocena števila obratov, ocena razžagane količine lesa, uporaba ostankov in vpliv pandemije covid-19 na poslovanje). Pred izvedbo raziskave smo iz različnih podatkovnih baz zbrali seznam 1.128 poslovnih subjektov, ki imajo kot C16 (Obdelava in predelava lesa) registrirano primarno ali sekundarno dejavnost. Izpolnjene vprašalnike nam je posredovalo 588 podjetij, od katerih se jih 328 ukvarja z razžagovanjem hlodovine. V letu 2019 je skupna evidentirana količina razžagane hlodovine znašala 1,71 milijona m3, od tega so z 84 % prevladovali iglavci. Žagarski obrati, ki so sodelovali v anketi, so v letu 2019 proizvedli 633.894 m3 žaganega lesa. Proizvodnja žagovine in lesnega prahu je znašala 237.389 ton, kosovnih ostankov pa 252.655 m3. Epidemija nalezljive bolezni covid-19 in ukrepi za njeno zajezitev so v obdobju od marca do maja 2020 (prvi val) vplivali na poslovanje podjetij v primarni lesnopredelovalni industriji; 63 % sodelujočih podjetij v tem sklopu vprašanj je občutilo posledice epidemije. Keywords: žagarstvo, žagan les, žagarski obrat, predelava okroglega lesa, iglavci, listavci Published in DiRROS: 18.12.2021; Views: 1073; Downloads: 333 Full text (416,31 KB) |
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58. Climatic regulation of leaf and cambial phenology in Quercus pubescens : their interlinkage and impact on xylem and phloem conduitsJožica Gričar, Jernej Jevšenak, Polona Hafner, Peter Prislan, Mitja Ferlan, Martina Lavrič, Dominik Vodnik, Klemen Eler, 2022, original scientific article Abstract: Increased frequency and severity of stressful events affects the growth patterns and functioning of trees which adjust their phenology to given conditions. Here, we analysed environmental effects (temperature, precipitation, VPD and SWC) on the timing of leaf phenology, seasonal stem radial growth patterns, and xylem and phloem anatomy of Quercus pubescens in the sub-Mediterranean in the period 2014%2019, when various adverse weather events occurred, i.e. spring drought in 2015, summer fire in 2016 and summer drought in 2017. Results showed that the timings of leaf and cambium phenology do not occur simultaneously in Q. pubescens, reflecting different environmental and internal constraints. Although year-to-year variability in the timings of leaf and cambial phenology exists, their chronological sequence is fairly fixed. Different effects of weather conditions on different stages of leaf development in spring were observed. Common climatic drivers (i.e., negative effect of hot and dry summers and a positive effect of increasing moisture availability in winter and summer) were found to affect the widths of xylem and phloem increments with more pronounced effect on late formed parts. A legacy effect of the timing of leaf and cambial phenology of the previous growing season on the timing of phenology of the following spring was confirmed. Rarely available phloem data permitted a comprehensive insight into the interlinkage of the timing of cambium and leaf phenology and adjustment strategies of vascular tissues in Mediterranean pubescent oak to various environmental constraints, including frequent extreme events (drought, fire). Our results suggest that predicted changes in autumn/winter and spring climatic conditions for this area could affect the timings of leaf and stem cambial phenology of Q. pubescens in the coming years, which would affect stem xylem and phloem structure and hydraulic properties, and ultimately its performance. Keywords: pubescent oak, leaf development, radial growth, initial earlywood vessel, sieve tube, anatomy, cambial cell production, extreme weather events Published in DiRROS: 06.09.2021; Views: 931; Downloads: 265 Full text (7,00 MB) This document has many files! More... |
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