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Iskalni niz: "polno besedilo" AND "organizacija" (Gozdarski inštitut Slovenije) .

2721 - 2730 / 3793
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2721.
Bryophyte species diversity of forest ecosystems in Slovenia (intensive monitoring programe)
Lado Kutnar, Andrej Martinčič, 2008, izvirni znanstveni članek

Povzetek: As part of the Intensive Monitoring Programme (IM) of Forest Ecosystems in Slovenia, the bryophyte flora and vegetation have been studied on 11 IM plots and 64 vegetation sub-plots (10*10 m). On the IM plots, high species diversityof bryophytes has been assessed. The total number of bryophytes was 109; among them 82 species belonging to the mosses (Bryophyta) and 27 species to the liverworts (Marchantiophyta). The mean number per plot was 27 species, ranging from 13 species on the Brdo plot to 36 species on the Borovec and Draga plots. The most common moss species are Hypnum cupressiforme, Ctenidium molluscum, Tortella tortuosa, Brachythecium velutinum, Isothecium alopecuroides, Dicranum scoparium, Polytrichum formosum, Fissidens taxifolius,F. dubius (Bryophyta); and liverworts are Radula complanata, Chiloscyphus profundus, Plagiochila porelloides and Metzgeria furcata (Marchantiophyta). Regarding the substrate preference, the opportunistic species that inhabit very different substrates are prevalent; and the second main group are bryophytes inhabiting wood material (epiphyte, epixylic species). Using multivariate techniques (cluster analysis, DCA), the bryophytes have proved to be valuable indicator of site conditions (bedrock, surface rockiness, soil type, micro- and regional climate, vegetation) and forest stand conditions (dominant tree species, dead wood).
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4167; Prenosov: 1879
.pdf Celotno besedilo (972,91 KB)

2722.
Pomladitvena ekologija drugotnih visokogorskih smrekovih gozdov v Jelendolu
Elizabeta Rozman, Jurij Diaci, 2008, izvirni znanstveni članek

Povzetek: Pomlajevanje visokogorskih smrekovih gozdov v Jelendolu je oteženo zaradi spleta dejavnikov. Jeseni leta 2003 smo v veliki vrzeli, malih vrzelih in pod sklenjenim sestojem na mreži 5 x 5 m postavili skupaj 227 ploskvic velikosti 1,5 x 1,5 m z namenom ugotoviti splošne pomladitvene razmere in glavne zaviralne dejavnike pomlajevanja. Na ploskvicah smo zbrali podatke o ekološkihrazmerah (relief, lega, nagib, globina tal, sestava površja, direktnoin difuzno sončno sevanje), vrsti in pokrovnosti pritalne vegetacije ter vrstah, gostoti, višinah in priraščanju mladja. Asimetrija v osvetljenostije vidna tako v smeri N-S kot E-W. Glede na porazdelitev direktnein difuzne svetlobe smo ploskvice razdelili na štiri skupine. Smreka je dobro pomlajena (28.605 na ha), zlasti izrazit je rob velike vrzeli, vendargostota mladja ni značilno odvisna od svetlobe. Nasprotno pa pomanjkanjesvetlobe onemogoča nadaljnji razvoj v sestoju in v malih vrzelih. Rezultati so pokazali, da svetlobne razmere na 1.500 m n.v. niso edini dejavnik, ki vpliva na uspešnost pomlajevanja. Velik pomen imajo še zlasti lesni ostanki, medtem ko je vpliv zeliščne plasti (prevladujeta Festuca altissima All. in Calamagrostis arundinacea (L.) Roth.) in globine tal negativen. Največji problem je še vedno objedanje.
Ključne besede: visokogorski gozdovi, smrekovi gozdovi, pomlajevanje, ekološki dejavniki, sončno sevanje, vrzeli, Jeledol
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4527; Prenosov: 1957
.pdf Celotno besedilo (678,95 KB)

2723.
Talne in vegetacijske razmere na območju GGE Lešje
Mateja Cojzer, Ljuban Cenčič, Lado Kutnar, Mihej Urbančič, Milan Kobal, Tomaž Kralj, 2008, izvedensko mnenje, arbitražna odločba

Ključne besede: tla, vegetacija, Lešje
Objavljeno v DiRROS: 12.07.2017; Ogledov: 2976; Prenosov: 745
.pdf Celotno besedilo (3,15 MB)

2724.
Analiza vsebine iztrebkov volka (Canis lupus) v Sloveniji
Miha Krofel, Ivan Kos, 2010, kratki znanstveni prispevek

Povzetek: Volk (Canis lupus) je oportunistični plenilec, ki pleni predvsem velike sesalce. Njegova prehrana se zelo razlikuje med posameznimi območji, zato je pomembno pridobiti lokalne podatke iz različnih delov njegovega areala. V Sloveniji je prehrana volka slabo raziskana. V članku predstavljamo rezultate preliminarne raziskave, v kateri smo analizirali 30 iztrebkov volkov, nabranih po večjem delu razširjenosti volka v Sloveniji. S pomočjo mikroskopskeanalize dlak in preiskave zob ter postkranialnih delov skeleta iz iztrebkov smo določili plenske vrste ter izračunali njihovo frekvenco pojavljanja in delež zaužite biomase. Kot glavni plen volka v Sloveniji so se izkazali cervidi (Cervidae), ki smo jih našli v 87 % iztrebkov in so sestavljali 85 % zaužite biomase. V manjši meri so se volkovi hranili še z mladiči divjega prašiča (Sus scrofa; 7 % iztrebkov, 5 % zaužite biomase) in ostanki domačih živali (7 % iztrebkov, 10 % zaužite biomase).
Ključne besede: volk, sivi volk, Canis lupus, prehrana, analiza iztrebkov, plenilstvo, Slovenija
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4559; Prenosov: 1990
.pdf Celotno besedilo (88,51 KB)

2725.
Razmerje med ksilemskim in floemskim prirastkom pri jelki (Abies alba Mill.)
Luka Krže, Jožica Gričar, Katarina Čufar, 2007, izvirni znanstveni članek

Povzetek: Pri 10 zdravih jelkah (Abies alba) smo raziskali anatomsko zgradbo floemskih branik (FB) glede na njihovo širino, razmerje med številom slojev celic v FB in v ksilemskih branikah (KB) iste sezone, razlike v številu slojev celic v FBin KB po obodu posameznega drevesa ter zvezo med širino FB in KB, nastalih vistem letu, ter širino dormantne kambijeve cone (KC). Intaktne vzorce tkiv zaraziskave smo vzeli iz živih dreves v letih 2001 in 2002 ter pripravili preparate prečnih prerezov za svetlobno mikroskopijo. Ugotovili smo zvezo med širino in anatomsko zgradbo FB. Pri ožjih FB je prevladoval rani floem, pri širših pa kasni. Pri širših FB se je v kasnem floemu lahko pojavil dodatni pasaksialnega parenhima. KB so bile 2- do 21-krat širše od FB. Širina KB je poobodu posameznega drevesa bolj variirala kot širina FB. Širina dormantne KC je bila v pozitivni zvezi s širino FB in KB.
Ključne besede: navadna jelka, Abies alba Mill., prirastek, ksilem, floem, kambijeva cona
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4435; Prenosov: 1963
.pdf Celotno besedilo (3,06 MB)

2726.
The research of virtual production in wood industry
Tomislav Grladinović, Leon Oblak, Jože Kropivšek, Tomislav Poršinsky, Denis Jelačić, Darko Motik, 2007, izvirni znanstveni članek

Povzetek: Enterprises with inflexible production structures can no longer survive in a turbulent market, as they cannot react to changes that would lead to their development. In order to satisfy specific customer needs related to quality, quantity, cost and delivery terms, it is necessary to restructure the existingenterprises according to the Taylor principle. One of reconstruction possibilities is the implementation of new co-operation forms that lead to virtual enterprises i.e. changeable networks. A changeable network can only achieve efficiency by means of a modern information and communication technology. This paper presents an idea of a changeable network that can be acceptable for all participants within a virtual enterprise.
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4217; Prenosov: 1858
.pdf Celotno besedilo (542,61 KB)

2727.
Internal and external moisture transport resistance during non-stationary adsorption of moisture into wood
Bojan Bučar, 2007, izvirni znanstveni članek

Povzetek: The assumption that non-stationary sorption processes associated with wood canbe evaluated by analysis of their transient system response to the disturbance developed is undoubtedly correct. In general it is, in fact, possible to obtain by time analysis of the transient phenomenon - involving the transition into an arbitrary new state of equilibrium - all data required for a credible evaluation of the observed system. Evaluation of moisture movement during drying or moistening requires determination of external moisture transfer resistance from or to wood surfaces, as well as internal resistance. Time-dependent changes in the moisture content of the spruce (Picea abies Karst.) samples of different thickness were monitored gravimetrically, during which the frequency of weighing was in accord with thespeed of moistening. It was assumed that quasi-isothermal sorption processes associated with wood could be evaluated as first order systems. The characteristic time constant ? determines, wholly and uniformly, the time dependence of the sorption process for the relevant sorption range of wood tissue. The connection between the time constant and the thickness of the sample measured in the direction of the material flux is potential, with the power depending solely on the relationship between the external mass transfer convection and internal diffusion resistance. To determine the said resistances or coefficients of mass transfer convection and diffusivity, the experiment must be carried out on samples of varying thickness. It is only in this way that the external mass transfer convection and internal diffusion resistance can be correctly distinguished.
Ključne besede: wood sorption, first order system, time constant, mass transfer, diffusivity
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4366; Prenosov: 1870
.pdf Celotno besedilo (428,03 KB)

2728.
Structure, development and growth of selection forests at the Granata research site
Matej Reščič, Andrej Bončina, 2007, izvirni znanstveni članek

Povzetek: The Granata research site was established for the study of structure, growth and regeneration of silver fir-European beech single stem selection forest. Three phytocoenological relevés were carried out, all trees ?5 cm diameter at breast height (d.b.h.) were measured by full callipering, tree growth was analysed for sample trees, regeneration of tree species was registered on 63 sampling plots. In addition, historical data from past forest inventories werestudied. In the period from 1952 to 2003, the share of silver fir has decreased from 86% to 26%, the share of Norway spruce increased significantly,whereas the share of beech and sycamore has slightly increased. The current growing stock amounts to 350 m3 ha-1, with large-size diameter trees (d.b.h. ?50 cm) representing 51% of total growing stock. The site is divided into 16 stand patches with significant differences in tree species composition and diameter distribution. Regeneration is sufficient with silver fir prevailing in total number of seedlings (42%). 23% of all seedlings are damaged as a result of game browsing.
Ključne besede: selection forest, plenterwald, selection system management, stand structure, tree species composition, regeneration, diameter distribution
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4704; Prenosov: 2018
.pdf Celotno besedilo (558,46 KB)

2729.
Measuring the limits of uphill timber skidding with a WOODY 110 forestry tractor
Boštjan Košir, Jurij Marenče, 2007, kratki znanstveni prispevek

Povzetek: The paper deals with the test results of uphill skidding of wood with a WOODY 110 cable skidder. The aim of the study was to find the limits of uphill skidding in relation to load size, log orientation and the slope. The trial was prepared on a test track of concave shape in the forest and with pre-designed loads of different sizes. The loads were skidded uphill once withbutt-end and then with top-end forward, until the tractor stopped because of the slope. The results show that butt-end forward skidding is more efficient. The difference between maximum loads at specific maximum slopes is almost constant (0.53 t). Proper load formation (butt-end forward if possible)is more important when skidding on steeper slopes.
Ključne besede: forestry, tractor, skiiding, maximum slope, maximum load
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4190; Prenosov: 1915
.pdf Celotno besedilo (436,49 KB)

2730.
Inclusion of consumers in the forming of wood fuel trade market on the pattern of questionnaired households
Benjamin Leskovec, Iztok Winkler, 2007, izvirni znanstveni članek

Povzetek: The research of wood fuel trade is market management oriented at household level. We devoted our attention to determine the key questions, market segmentation and market potentials. 909 households, which took part in the questionnaire and received financial support to purchase a wood biomass boilerfrom 2003 until 2006, represented our data source. The analysed pattern of questionnaired households indicates a vast unrealized developmental potential at placing additional quantities of chunkwood and forest chips on the market. Own forests still represent the most important heating source in households. Switching to wood biomass heating is practiced particularly by fuel oil consumers. Since the consumer has been placed into the centre of our research, we present some fundamental findings on product making and product development, its price, sale, promotion and management control. Our findings indicate that right business decisions and the ability to adjust to the marketfluctuation enable us good developmental possibilities.
Ključne besede: wood biomass, wood fuel trade, households, market management, chunkwood, forest chips, pellets, Slovenia
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4274; Prenosov: 1921
.pdf Celotno besedilo (515,49 KB)

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