Iskanje po repozitoriju

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Povzetek: Izdelali smo model določanja območij s poudarjeno zaščitno funkcijo glede na vrste naravnih nevarnosti in škodni potencial in ga na območju gozdnogospodarskih enot Tržič in Jezersko preverili za dve vrsti naravnih nevarnosti - padajoče kamenje in skale (v nadaljnjem besedilu padajoče kamenje) ter snežne plazove. Območja s poudarjeno zaščitno funkcijo smo določili na podlagi: 1) modeliranja območij ogroženosti, ki zajemajo območja sproščanja in premeščanja padajočega kamenja ter snežnih plazov, 2) podatkov o stavbah, naseljih in infrastrukturi in 3) maski gozdne površine. Zbirke prostorskih podatkov smo analizirali s programi MapInfo 10.5, ArcGIS 10.0 in 3D modelom trenja Conefall. Z modeliranjem smo določili območje s poudarjeno zaščitno funkcijo na površini 625 ha, od tega je večji del določen zaradi nevarnosti padajočega kamenja (44 %), nekoliko manjši pa zaradi snežnih plazov (27 %), 29 % te površine pa ogrožajo padajoče kamenje in snežni plazovi. Na pretežni površini gozdov s poudarjeno zaščitno funkcijo (65 %) je stopnja ogroženosti velika. Naši rezultati kažejo na znatno podcenjenost uradnih podatkov o površinah gozdov s poudarjeno zaščitno funkcijo.
Ključne besede: modeliranje, skalni podori, naravne nevarnosti, zaščitni gozdovi, neposredna zaščitna funkcija, plazovi, Karavanke, padajoče kamenje, padajoče skale, gozdovi, Slovenija
Objavljeno v DiRROS: 13.11.2018; Ogledov: 4856; Prenosov: 3384
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Povzetek: Particleboard and MDF are the most usable materials for furniture production, where emission of formaldehyde should be as low as possible. In order to improve aesthetic properties of particleboard and MDF they are covered with appropriate surfacing material. In most cases, melamine impregnated paper is used for face layers. But covering faces should be accompanied with covered edges, as due to low density of core layer formaldehyde much more easily emits from edges than from faces. The presented research shows differences in formaldehyde emission rate at unsurfaced and surfaced MDF and particleboard. For face layer, melamine impregnated papers with grammages of 130 g/m2 and 200 g/m2 were used, while for covering edges, melamine edge-banding tape was applied. In the research it was determined that higher barrier effect was achieved when impregnated paper with a grammage of 200 g/m2 was used. When surface was completely covered with impregnated paper and melamine edge-band tape, formaldehyde emission was lowered by between 83 % and 94 %.
Ključne besede: particleboard, MDF, surfacing, melamine impregnated paper, melamine edge band-tape, formaldehyde emission
Objavljeno v DiRROS: 13.11.2018; Ogledov: 4508; Prenosov: 3065
Celotno besedilo (1,18 MB)
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Povzetek: Rekreacijska in turistična raba gozdov v Sloveniji je v porastu. Razlogov je več, med drugim tudi ugodne značilnosti in vsebine gozda v Sloveniji za tako rabo. K povpraševanju in dejanski rabi in izrabi potencialov nedvomno prispeva tudi ozaveščenost prebivalcev o pomenu gibanja v naravi za zdravje in dobro počutje, intenziven marketing proizvajalcev športne opreme za prosti čas ter možnost neposrednega ali posrednega zaslužka z različnimi turističnimi produkti, kot so opazovanje živali ali lov, vodeni pohodniški ali kolesarski izleti, nabiralništvo in drugo. Kakor pri tem obstajajo koristi za uporabnike oziroma izvajalce dejavnosti, pa se na drugi strani pojavljajo različni konflikti na ravneh lastništva in uporabnikov gozdnega prostora. Med pogostejšimi konflikti prepoznavamo negativne vplive aktivnosti na sam gozdni ekosistem, poseganje v lastninsko pravico lastnikov gozdov, navzkrižje interesov med deležniki ali med različnimi rabami gozda in podobno.
Ključne besede: raba gozdov, trajnostna strategija, gozdna pedagogika, turistične kmetije, lastniki gozdov, medvedi, zakonodaja, zborniki, elektronske knjige
Objavljeno v DiRROS: 15.10.2018; Ogledov: 5036; Prenosov: 1466
Celotno besedilo (12,57 MB)

Ključne besede: gozdnogospodarki načrti, sistem načrtovanja, gozdnogospodarska enota, Pokljuka, Slovenija
Objavljeno v DiRROS: 08.10.2018; Ogledov: 2252; Prenosov: 88

Povzetek: In recent decades, the conservation of biodiversity has become one of the main areas under consideration in managing forests in an ecologically sustainable way. Forest management practices are primary drivers of diversity and may enhance or decrease forest biodiversity, according to the measures applied (thinning options). We have focused on three beech (Fagus sylvatica L.) forests across a latitudinal gradient in Italy, characterised by different structures resulting from dissimilar management. We tested the short-term effects of differently-based silvicultural intervention vs. stands where no silvicultural practices were applied on biodiversity indicators and related proxies: deadwood amounts, microhabitat density, floristic richness and life form abundance. In each study area, the occurrence of the above indicators and proxies was evaluated before and after the implementation of crop tree thinning (CTT) and thinning from below (LT) methods, comparing them with control areas where no interventions were performed. After two years, the management options resulted in different responses of the investigated parameters. The CTT increased deadwood amounts in comparison with the LT ones, while stumps increased significantly after the LT thinning. Microhabitats increased significantly where intervention was not undertaken. On the contrary, they remained unaltered after the LT treatments. CTT thinning created favourable conditions for the development of microhabitats and their proliferation in the long term. Two years after the application of the CTT thinning treatment, all forest stands demonstrated a significant increase in their floristic richness and herb layer cover. Significant differences were also found in both the frequency and cover of life forms in relation to silvicultural treatment. These findings provide a better understanding of short-term effects of silvicultural treatment useful for maintaining biodiversity in mountain beech forests.
Ključne besede: deadwood, microhabitats, understory vegetation, mountain forests, sustainable forest management, Italian forests
Objavljeno v DiRROS: 04.10.2018; Ogledov: 2665; Prenosov: 1740
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