Iskanje po repozitoriju

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Povzetek: Na Zgornjem Gorenjskem že nekaj let beležimo/jo velike napade podlubnikov. Ker je količina prizadetega drevja zelo velika, prihaja do precejšnjih organizacijskih, kadrovskih, logističnih in komercialnih težav. Z namenom iskanja operativnih rešitev sta GG Bled d.o.o. in Zavod za gozdove Slovenije, OE Bled, organizirala enodnevno delavnico na Pokljuki. Na njej je bilo predstavljenih pet referatov, od tega trije tujih strokovnjakov. Nadalje je bila izvedena tudi anketa, katere rezultati so podrobno predstavljeni v prispevku.
Ključne besede: obvladovanje podlubnikov, smrekovi sestoji, Zgornja Gorenjska, operativne težave, anketa
Objavljeno v DiRROS: 19.10.2019; Ogledov: 2231; Prenosov: 674
Celotno besedilo (126,89 KB)

Povzetek: Although European larch is a commercially important tree species in the Alps, this study is among the first focusing on the quality and value of larch trees. Data from permanent sample plots of the Slovenia Forest Service (802 plots; 1851 trees) was used to model the quality and value of standing larch trees. The share of excellent and very good quality timber amounted to 49%, but the share of veneer logs and sawlogs I was only 11.7%. The quality and value of larch trees were positively influenced by the diameter at breast height and stand basal area, and negatively by altitude and harvesting intensity. In addition, timber value was higher in stands in regeneration and uneven-aged stands and in stands with a low share of spruce or high share of deciduous tree species. Trees from higher social layers and undamaged trees also proved to have more valuable timber. The quality of larch trees was lower on extreme beech and pine forest types.
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4137; Prenosov: 1833
Celotno besedilo (655,32 KB)

Povzetek: In this paper, growth characteristics of European beech (Fagus sylvatica L.) stands on site of Isopyro-Fagetum KOS. 62 are analysed. The research was carried out in Zasavje, where in mature beech stands five plots measuring 30x30 m were set. All trees above 10 cm were measured and cut for stem analyses. Increment of the last 10 years is statistically significantly influenced by (chronologic) age of trees, shade effect, diameter at breast height, social class and very rarely by crown dimensions. The time of current increment culmination is dependent on age, diameter at breast height, social class and on shade effect. As regards site productivity of the analysed site, a very broad range was ascertained. Variation is almost completely explained by altitude. On three plots sites, productivity increase was confirmed, whereas on one plot the changes were not significant and on one plot site productivity decreased, probably due to the transmitter on Mt Kum.
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4060; Prenosov: 1862
Celotno besedilo (285,77 KB)

Povzetek: This paper presents the growth potential of sycamore (Acer pseudoplatanus L.) on four types of forest sites located on carbonate bedrock. The research covers sycamore sites (Aceri-Fraxinetum ill.), beech sites (Lamio orvalae-Fagetum), beech sites planted with Norway spruce, and silver fir-beechsites (Omphalodo-Fagetum aceretosum). The analyses for each forest type were carried out on five plots. Our aim was to determine the effect of site factors and stand parameters on sycamore growth. Site productivity (SP) is positively correlated with soil depth, coarse silt percentage in the cambichorizon, the content of phosphorus in leaves and, partly, with potassium. The effect of nitrogen supply on height growth or SP was not confirmed. Furthermore, height growth on sites with a higher rate of nutrient cycling, higher macronutrient supply and higher sand percentage in the cambic horizon is significantly faster. As to the growth of basal area, in addition to positive dependences of crown size, many other correlations with site factors were confirmed.
Ključne besede: beech stand, growing stock, stand value, current volume increment, current value increment, quality structure, social collective
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4199; Prenosov: 1765
Celotno besedilo (185,52 KB)

Povzetek: Prispevek obravnava rastne značilnosti velikega jesena na štirih skupinah gozdnih rastišč v Sloveniji. Analizirali smo višinsko in debelinsko rast 162 velikih jesenov z 20 lokacij. Pokazalo se je, da najhitreje raste v višino veliki jesen na gabrovjih, po 70. letu ga prehiti jesen z jesenovih rastišč. Izrazito najpočasnejše rasti je jesen na gorskih bukovih rastiščih z apnenčasto matično podlago. Na teh rastiščih pokaže jesen zmerno, toda izrednovztrajno debelinsko rast, ki s starostjo ne upada in pri 80-90 letih preseže vse pre-ostale tri rastiščne skupine. Debelinska rast jesenovih, gabrovih in bukovih rastišč silikatne oziroma mešane podlage je do 50. leta strma, potem začne upadati, najpočasneje na jesenovih rastiščih. Tekoči višinski prirastek kulminira najpogosteje do 10. leta, povprečni starostni višinski prirastek pa do 20. leta. Tekoči debelinski prirastek kulminira med 6. in 67. letom, najpogosteje med 11.in 30. letom. Povprečni starostni debelinski prirastek kulminira v širšem razponu kot tekoči, in sicer med 12. in 99. letom, le redko pa pred 30. letom starosti. Razlike v višinskem in debelinskem priraščanju so lahko precejšnje tudi znotraj istih rastiščnih enot.
Ključne besede: veliki jesen, Fraxinus excelsior L., rastišče, višinska rast, debelinska rast, velikost krošnje, Slovenija
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4322; Prenosov: 1941
Celotno besedilo (782,14 KB)