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Pile-dwellings at Ljubljansko barje
Full text linkSince 1875, with short interruptions, interdisciplinary research of pile-dwellings has been carried out at the Ljubljansko barje. During the last decade and a half these have mostly been done under the leadership of a research group from the Institute of archaeology of ZRC SAZU and in cooperation with the Dendrochronological laboratory of the Department of Wood Science and Technology of the Biotechnical faculty of the University of Ljubljana.
This article presents the most important results. We discuss the precise, through dendrochronology and radiocarbon dating supported chronology of pile-dwellings, supported also by archaeological finds. We debate the settlement dynamics, time-spans of pile-dwellings, pile-dwelling settlement ground plans etc. We put emphasis on environmental studies and pile-dwellers economy. We discover that pile-dwellers were skilled metallurgists from at least the second quarter of the 4th millennium on. We discuss the presence of craftsmen-specialists. During field research internationally significant finds have been discovered which testify to the high level of pile-dwellers’ technological development
Compatibility of wood with a composite from polymethyl methacrylate and aluminium hydroxide
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The methodology for wood potential assessment in Slovenia
No full textThe information on wooden potentials from Slovenian forests is important for all stakeholders involved in the forest-wood chain (such as enterprises engaged in purchasing, processing or sales of roundwood, pulp industry, CHP plants ...). For these stakeholders, the actual amounts of wood appearing on the market are relevant. Thus the amount of wood consumed by forest owners for their own needs should be excluded. The Slovenian Forestry Institute has developed its own methodology for the evaluation of the actual and heoretical estimates of the quantities of timber. This article presents the potentials of both coniferous and deciduous roundwood as well as wood of lower quality. The actual potentials are based on the five-year averages (2009%2013) of wood that had previously been marked by district foresters for harvesting and at that time appeared on the market. The theoretical potentials, on the other hand, delineate the maximum amount of wood that can be harvested annually and sold on the market, while providing for sustainable forest management at the same time. The results are given in net cubic metres (m3 without bark) and oven-dry tons (ODT) when dealing with energy potential of lower-quality wood. The results show that in the case of spruce and fir trees the actual net quantity of roundwood on the market amounts to 1,239,000 m3. The assessment of theoretically marketable potentials of deciduous roundwood is 410,000 m3, while the actual amount of the deciduous roundwood on the market is 206,000 m3. In the case of lower-quality wood, the assessment of the total theoretically marketable potential is 1,443,000 ODT, while the assessment of the actual potentials on the market amounts to 468,000 ODT. The results indicate a low utilization rate of Slovenian forests, especially as far as privately owned forests are concerned. Still, we should be cautious in interpreting the results, as the analyses of the actual potential consider only the timber that was marked for harvesting by district forester, while in reality the harvested quantities are likely to be greater especially in privately owned forests
Analiza potencialov lesne biomase iz gozdov in hitrorastočih nasadov na območju Podravske, Spodnjeposavske, jugovzhodne regije
Full text linkStrokovne podlage za spremembo "Pravilnika o načinu vračila trošarine za energente, ki se porabijo za pogon kmetijske in gozdarske mehanizacije" (Uradni list RS, št. 21/2013) za gozdna zemljišča, po žledolomu 2014: strokovno mnenje
Full text linkAssessment of organic matter changes in the soil of the Brdo plot under different climate change scenarios through the Yasso07 model application
No full textThe forest soil can act as an important sink for CO2 and in that respect also appears in the national Kyoto reports, where a distinction is made between carbon accumulated in litter and organic soil horizons and carbon accumulated in mineral soil layers. There is a multitude of dynamic models of organic carbon (Corg) change in the soil particularly due to different environmental and anthropogenic factors. The purpose of this paper is the Yasso07 model application on the “Brdo” plot, which is part of the ICP Forest Level II plots of Slovenia. The Yasso07 model describes the decomposition of organic matter in the forest soil by dividing litter inputs into different components with varying decomposition rates. Here, the temporal change of soil Corg in various scenarios of future climate change (increase in air temperature, change in precipitation) was predicted. The difference between the measured amount and the model-predicted amount of Corg in the soil for the current climate on the Brdo plot is 6.4 t C ha-1 (88.6 t C ha-1 measured vs. 95.0 t C ha-1 predicted). Taking into consideration the climate change scenarios for Slovenia, Corg stock is expected to decrease in the future according to Yasso07 projections in all scenarios of climate change. The estimate of 100-year decrease of Corg is the largest for scenario, when large increase of both temperature and precipitation is expected (18.2%) and smallest when small temperature increase and precipitation decrease are predicted (9.3%). Assuming stable litter input, larger influence on Corg decrease was predicted for the temperature change compared to precipitation change. However, many uncertainties are included in model estimates ranging from litter input estimates, climate change uncertainties, climate-litter production feedbacks, starting value estimates, etc. The determination of the uncertainty of model calculations is a requirement for conducting simulations and their interpretation