21. Poročilo o preskusu št.: LVG 2021-067 : opis vzorca: Pinus nigra, veja (z listi ali brez) ali poganjki, št. enot 4 : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Tašja Cvelbar, Barbara Piškur, 2021, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, Fusarium circinatum, Diplodia pinea, Pinus nigra
Published in DiRROS: 19.07.2021; Views: 648; Downloads: 0 |
22. Poročilo o preskusu št.: LVG 2021-030 : opis vzorca: 11583943: Pinus nigra, veja (z listi ali brez) ali poganjki, 11583950: Pinus, veja (z listi ali brez) ali poganjki, 11583967: Pinus nigra, veja (z listi ali brez) ali poganjki, 11583974: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: 11583943: sum na: Fusarium circinatum, 11583950: sum na: Fusarium circinatum, 11583967: sum na: Fusarium circinatum, 11583974: sum na: Fusarium circinatumNikica Ogris, Tašja Cvelbar, Barbara Piškur, 2021, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, vektorji, Fusarium circinatum, Pinus nigra
Published in DiRROS: 24.05.2021; Views: 786; Downloads: 0 |
23. The effect of bedrock and species mixture on wood density and radial wood increment in pubescent oak and black pineLuka Krajnc, Polona Hafner, Jožica Gričar, 2020, original scientific article Abstract: Wood density and radial wood increment were examined in trees of pubescent oak (Quercus pubescens Willd.) and black pine (Pinus nigra Arnold., subsp. nigra) in relation to stand mixture and underlying bedrock. Trees of both species from pure and mixed stands were sampled across two types of bedrock, limestone and flysch. Trees from each species were similar in age. Wood density was estimated in standing trees using resistance drilling and increment cores were taken from a smaller subsample of trees of both species. Tree-ring, earlywood and latewood widths were measured and compared to radial profiles of wood density. The influence of stand mixture, diameter at breast height and bedrock on wood density was examined using a Bayesian general linear model. Wood density was significantly higher in pubescent oak than in black pine. Stand mixture was found to affect wood density positively, although the magnitude of the effect was relatively small when compared to other influencing factors also included in the current study. The effect of diameter on wood density was positive on both bedrocks in pubescent oak and negative or neutral in black pine. The size of the effect varied by bedrock and species. On flysch bedrock, the influence of diameter on wood density was stronger than it was on limestone. These indirect bedrock effects on wood density are probably a result of different soil fertility rather than the bedrock itself. There was a notable difference in radial wood increment in both species across the two bedrocks, whereas the differences in densities were smaller. Higher wood densities found on flysch in the subsample of pubescent oaks are likely an effect of higher proportions of latewood, while the opposite trend was observed in black pine. Higher wood density was found on limestone in black pine despite higher latewood percentages on flysch. In the context of forest management, the species composition of the naturally occurring mixtures in the sub-Mediterranean region should be adjusted slightly to favor pubescent oak, since it is a climax species and will bind more carbon for longer than black pine due to higher wood densities. Future forest management should also promote the overall development of pubescent oak trees in sub-Mediterranean stands. The results are especially important in the European context, because the share of sub-Mediterranean stands is expected to rise with global warming.
Keywords: Karst, wood structure, resistograph, resistance drilling, Quercus pubescens, Pinus nigra, limestone, flysch
Published in DiRROS: 14.01.2021; Views: 1092; Downloads: 372
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24. Rjavenje borovih iglic - primer ukrepanja v Soški doliniZoran Zavrtanik, Marija Kolšek, 2020, professional article Abstract: Gozdarski inštitut Slovenije je v letih 2015 do 2018 na več lokacijah v Soški dolini potrdil prisotnost glive Lecanosticta acicola, ki povzroča bolezen rjavenje borovih iglic, tudi na črnem boru (Pinus nigra), kar je glede na dosedanje raziskave te glive v Evropi redkost. Glede na rezultate raziskav in opažanja na terenu je populacija glive na črnem boru najverjetneje zelo patogena in bi lahko ogrozila naravne sestoje črnega bora v Sloveniji. V primerjavi z drugimi populacijami te glive v Sloveniji sklepamo, da je zaenkrat geografsko izolirana populacija glive na črnem boru. Zato je bila leta 2018 sprejeta odločitev, da se v Zgornjem Posočju izvedejo ukrepi za omejevanje širjenja glive. Pred decembrom 2019 je bila gliva uvrščena na seznam II.A.I Direktive Sveta 2000/29/ ES kot Scirrhia acicola. Z novo zakonodajo EU s področja zdravstvenega varstva rastlin je gliva L. acicola uvrščena na sezname nadzorovanih nekarantenskih škodljivih organizmov. Uprava za varno hrano, veterinarstvo in varstvo rastlin (UVHVVR), Gozdarski inštitut Slovenije in Zavod za gozdove Slovenije so pripravili načrt ukrepanja, ki ga je potrdil direktor UVHVVR. Ukrepanje v gozdnem prostoru je potekalo konec leta 2019 in v prvi polovici leta 2020.
Keywords: Lecanosticta acicola, rjavenje borovih iglic, Soška dolina, Pinus nigra, črni bor, ukrepanje, gozdovi
Published in DiRROS: 14.11.2020; Views: 1765; Downloads: 448
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25. Vzroki izredno obsežnega pojava sušice najmlajših borovih poganjkov (Diplodia pinea) v okolici Podgorja leta 2008Nikica Ogris, Boštjan Košiček, 2009, professional article Keywords: črni bor, Pinus nigra Arn., poganjki, sušenje, sušica, Diplodia pinea, bolezni drevja, gozdovi, varstvo gozdov
Published in DiRROS: 29.07.2020; Views: 1623; Downloads: 783
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26. Poročilo o preskusu št.: LVG 2020-031 : opis vzorca: 11179252: Pinus nigra, veja (z listi ali brez) ali poganjki, 11179269: Pinus sylvestris, veja (z listi ali brez) ali poganjki : namen testiranja: 11179252: sum na: Fusarium circinatum, 11179269: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Špela Jagodic, Zina Devetak, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, Fusarium circinatum, Gibberella circinata, Pinus nigra, Pinus sylvestris, odmiranje najmlajših borovih poganjkov, Diplodia pinea, rdeči bor, črni bor
Published in DiRROS: 26.05.2020; Views: 1439; Downloads: 0 |
27. Poročilo o preskusu št.: LVG 2020-003 : opis vzorca: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Zina Devetak, Špela Jagodic, Barbara Piškur, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, črni bor, Pinus nigra, borov smolasti rak, Fusarium circinatum, sušica najmlajših borovih poganjkov, Diplodia pinea
Published in DiRROS: 18.03.2020; Views: 1517; Downloads: 287
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28. Poročilo o preskusu št.: LVG 2019-198 : opis vzorca: Pinus nigra, les, lubje, sekanci : namen testiranja: sum na: Heterobasidion irregulareNikica Ogris, Zina Devetak, Špela Jagodic, Barbara Piškur, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Sarcoporia polyspora, črni bor, Pinus nigra, redka gliva
Published in DiRROS: 16.12.2019; Views: 1642; Downloads: 91 |
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30. Seasonal radial growth of Black pine (Pinus nigra Arnold) from Bosnia and Herzegovina, monitored by the pinning method and manual band dendrometersSimon Poljanšek, Jernej Jevšenak, Jožica Gričar, Tom Levanič, 2019, original scientific article Abstract: Despite numerous dendroclimatological investigations into different tree species from Bosnia and Herzegovina, information is lacking on intra-annual wood formation patterns, which would help us to interpret the climate signal in tree rings better. Using the pinning method and manual band dendrometers, we investigated the seasonal dynamics of radial growth of black pine (Pinus nigra Arnold) trees in two successive growing seasons: 2011 and 2012. The up to 60-year-old trees grew in a stand at the base of a hill in the western, mountainous part of the Balkan Peninsula. The seasonal dynamics of wood formation and final number of cells differed between the studied years. Wood formation started in both years in early to mid-March. Differences were noticed in the wood production culmination; in 2011 it occurred at the end of May and beginning of June in 2012 and 2011, respectively. Xylem growth finished in 2012 in the middle of August and in 2011 in the middle of September. Based on the first derivative of the Gompertz function calculated rate of xylem growth was lowest in 2011. The dendrometers recorded a slow increment rate in spring, higher in summer and a decreasing rate again in the late summer in both growing seasons. In comparison with pinning, dendrometers showed a delay in the start of radial growth of up to 20 days in 2012. Additionally, dendrometers showed an increase in stem girth after the end of both growing seasons, when wood formation was already completed. Deviations between the two methods could be ascribed to the influence of water storage dynamics in the main stem and numerous structural processes in bark tissue, which are captured in dendrometer data. The influence of weather conditions on xylem phenology is also indicated by differences between the two studied years, although it is difficult to identify the influence of particular short-term weather events.
Keywords: pinning, manual dendrometers, radial growth, Pinus nigra, cambium, Balkan Peninsula
Published in DiRROS: 11.09.2019; Views: 4680; Downloads: 3848
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