281. Poročilo o preskusu št.: LVG 2021-018 : opis vzorca: 11583660: Pinus nigra, veja (z listi ali brez) ali poganjki, 11583677: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: 11583660: sum na: Fusarium circinatum, 11583677: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Tašja Cvelbar, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize
Objavljeno v DiRROS: 15.04.2021; Ogledov: 662; Prenosov: 0 |
282. Poročilo o preskusu št.: LVG 2021-013 : opis vzorca: LVG2021/00018/V4: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00015/V1: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: LVG2021/00018/V4: sum na: Dothistroma, LVG2021/00015/V1: sum na: DothistromaNikica Ogris, Tašja Cvelbar, Zina Devetak, Barbara Piškur, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize
Objavljeno v DiRROS: 15.04.2021; Ogledov: 708; Prenosov: 0 |
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285. Poročilo o preskusu št.: LVG 2021-015 : opis vzorca: LVG2021/00014: Ulmus, les, lubje, sekanci, LVG2021/00015/V1: Pinus nigra, veja (z listi ali brez) ali poganjki, LVG2021/00016/V2: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00017/V3: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00018/V4: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00022/mdg: Pinus sylvestris, žuželka, LVG2021/00019: Pseudotsuga menziesii, veja (z listi ali brez) ali poganjki : namen testiranja: LVG2021/00014: sum na: Scolytus, LVG2021/00015/V1: sum na: Dothistroma, LVG2021/00016/V2: sum na: Diplodia pinea, LVG2021/00017/V3: sum na: Diplodia pinea, LVG2021/00018/V4: sum na: Dothistroma, LVG2021/00022/mdg: sum na: Fitofagna žuželka, LVG2021/00019: sum na: GlivaNikica Ogris, Tašja Cvelbar, Zina Devetak, Maarten De Groot, Barbara Piškur, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize
Objavljeno v DiRROS: 15.04.2021; Ogledov: 729; Prenosov: 222
 Celotno besedilo (5,08 MB) |
286. Ohranjenost drevesne sestave in realizacija možnega poseka zmanjšujeta obseg sanitarnih sečenj v SlovenijiJurij Diaci, Maarten De Groot, Nikica Ogris, 2021, strokovni članek Povzetek: Splošno sprejeto stališče je, da s sonaravnim gospodarjenjem zmanjšujemo tveganja pri gospodarjenju z gozdovi. Za potrditev tega stališča obstajajo dobri zgledi gospodarjenja in posredni dokazi, primanjkuje pa znanstvenih študij, ki bi na podlagi kvantitativnih analiz to potrjevale. V Sloveniji smo potrdili pozitivne povezave med ohranjeno drevesno sestavo, rednim gospodarjenjem in manj sanitarnimi sečnjami. V dobi izrazitih okoljskih sprememb je smiselno spodbujati redno gospodarjenje z gozdovi. V prihodnosti bo zaradi socialno-ekonomskih sprememb še bolj izraženo opuščanje gospodarjenja. V članku razpravljamo o številnih prednostih rednega gospodarjenja. V prihodnje bo treba poleg vloge rednega gospodarjenja za preskrbo lesnopredelovalne verige večji poudarek nameniti pomenu dejavnega gospodarjenja za prilagajanje gozda na okoljske spremembe in za zdravje gozda.
Ključne besede: realizacija možnega poseka, aktiviranje gospodarjenja z gozdovi, zdravje gozda, podlubniki, sestoji smreke
Objavljeno v DiRROS: 14.04.2021; Ogledov: 1530; Prenosov: 427
Celotno besedilo (214,07 KB) |
287. Drought stress can induce the pathogenicity of Cryptostroma corticale, the causal agent of sooty bark disease of sycamore mapleNikica Ogris, Ana Brglez, Barbara Piškur, 2021, izvirni znanstveni članek Povzetek: Reports of sooty bark disease of maples caused by the fungus Cryptostroma corticale have recently been emerging from across Europe. The aims of our study were to describe the first report of sooty bark disease in Slovenia, to determine the pathogenicity of C. corticale, to confirm the optimum temperature for the growth of the fungus, and to determine the mass loss of Acer pseudoplatanus wood inoculated by C. corticale. We confirmed the presence of C. corticale on A. pseudoplatanus via morphological and molecular analysis. The optimal growth of C. corticale was measured in vitro on potato dextrose agar and was determined to occur at 25 °C. Pathogenicity tests were performed on 30 saplings of A. pseudoplatanus under two treatments, humid and drought stress, and the fungus was pathogenic in both treatments. The mean length of bark lesions and wood discoloration of the drought-stressed saplings was significantly greater than that in the humid treatment. Re-isolations of C. corticale were successful from all inoculated saplings, and thus Koch%s postulates were confirmed. The mass loss of A. pseudoplatanus wood was determined by mini-block test in a period of 10 weeks and was observed as minimal. Based on the results, we conclude that C. corticale is a weak and opportunistic pathogen that most likely expresses itself intensively under hot and dry conditions.
Ključne besede: pathogenicity, drought stress, optimal growth, climate change, mass loss, mini-block test, wood rot, opportunistic pathogen, saprophyte, endophyte
Objavljeno v DiRROS: 23.03.2021; Ogledov: 1155; Prenosov: 874
Celotno besedilo (3,21 MB)
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288. Private forest owner characteristics affect European spruce bark beetle management under an extreme weather event and host tree densityMaarten De Groot, Jurij Diaci, Kaja Kandare, Nike Krajnc, Rok Pisek, Špela Ščap, Darja Stare, Nikica Ogris, 2021, izvirni znanstveni članek Povzetek: In the last few decades, an increasing number and intensity of bark beetle outbreaks have plagued the forests of Europe and North America. Bark beetle management is directly related to forest owner characteristics, although this relationship is not well understood. The purpose of the study was to investigate the influence of forest owner characteristics on the amount and timing of sanitary felling under different disturbance regimes and quantities of Norway spruce. We combined different databases on sanitary felling, the timing of sanitary felling, and forest owner characteristics for Slovenia from 2014 to 2018 and analyzed the amount and timing of sanitary felling in relation to forest owner characteristics. We found that the timing in winter and the amount of sanitary felling were positively associated with the distance of the owner%s residence to the forest parcel. Larger parcels were more affected by bark beetles but did not have later timing of cutting in the summer period as was hypothesized. The timing of sanitary felling decreased with property size, while with the probability of sanitary felling, the effect of property depended on the ice storm and the amount of spruce. The size of the settlement, the permanent address of the private owner, and timing of sanitary felling were positively associated but also depended on the amount of spruce. Gender and age did not have an important influence on the amount and timing of sanitary felling. Forest owners are an important factor in effective bark beetle management. This study highlights the private forest ownership characteristics that should be emphasized in order to fight bark beetle outbreaks in the event of large-scale disturbances. Governments should support forest owners who are at greater risk of bark beetle outbreaks and less efficient in managing outbreaks. Furthermore, landowner characteristics should be included when forecasting bark beetle outbreaks.
Ključne besede: close-to-nature management, sanitary felling, Ips typographus, forest pest management, forest owner characteristics
Objavljeno v DiRROS: 22.03.2021; Ogledov: 1177; Prenosov: 824
Celotno besedilo (444,49 KB)
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