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Abstract: Scots pine (Pinus sylvestris L.) is one of the most important tree species in European forests. This study aims to determine whether there is inter-provenance variability in researched morphological traits in two international provenance tests of Scots pine in Bosnia and Herzegovina. We measured height, root collar diameter, and latest shoot length and counted branches on the latest branch whorl of Scots pine plants in two provenance tests. The provenance tests are located in Kupres and Žepče, in different climatic, edaphic, and orographic conditions. Kupres and Žepče contain 15 and 14 provenances, respectively, eleven of which are mutual to both sites. Descriptive statistics and analysis of variance showed differences among provenances in all investigated morphological traits. These differences were attributable to provenance test, provenance, and interaction between provenance test and provenance. The average values were higher in Žepče for all provenances and all studied traits. The Austria A1, Austria A2, Austria A3, and Poland P1 provenances showed the best growth in both tests, while the Italy I1 provenance showed good growth in Žepče but not in Kupres.
Keywords: Scots pine, provenance tests, morphological traits, Pinus sylvestris L.
Published in DiRROS: 01.04.2020; Views: 3827; Downloads: 2522
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Abstract: V pričujoči študiji smo preučevali anatomske, kemijske in izbrane fizikalne lastnosti beljave in jedrovine rdečega bora (Pinus sylvestris L.) in tudi morebitni vpliv ekstraktivov na sorpcijske lastnosti borovine. Študija je bil opravljena na 6 testnih drevesih. Anatomske preiskave so bile narejene s klasično svetlo-poljsko mikroskopijo. Preiskovanje vzorcev za določanje dimenzijske stabilnosti in sorpcijskih lastnosti je potekalo po uravnovešanju v steklenih klima komorah. Vzorce za kemijsko analizo smo ekstrahirali s cikloheksanom ter z zmesjo acetona in vode, delež celokupnih fenolov pa smo kolorimetrično določili z UV-Vis spektrofotometrijo. Razlike med beljavo in jedrovino so se pokazale v smolnih kanalih, v lumnih aksialnih traheid ob trakovih ter v trakovnih parenhimskih celicah in v obokanih piknjah. Delež ekstraktivnih snovi v jedrovini je bil večji kot v beljavi. Preiskave beljave in jedrovine niso pokazale statistično značilnih razlik v gostoti v absolutno suhem stanju, pri točki nasičenja celičnih sten, diferencialnem nabrekanju v radialni smeri in ne pri koeficientu nabrekanja v tangencialni smeri. Izkazalo se je, da se prečna krčitvena anizotropija, diferencialni nabrek v tangencialni smeri, koeficient nabrekanja v radialni smeri ter sorpcijski kvocient razlikujejo pri beljavi in jedrovini rdečega bora. Omenjene razlike lahko pripišemo vzajemnemu učinku anatomskih in kemičnih značilnosti obeh kategorij lesa, vsekakor
Keywords: rdeči bor, Pinus sylvestris L., sorpcijske lastnosti, beljava, jedrovina, ekstraktivi, anatomija lesa
Published in DiRROS: 16.10.2019; Views: 5867; Downloads: 3003
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Keywords: varstvo gozdov, borov smolasti rak, Fusarium circinatum, Gibberella circinata, rdeči bor, Pinus sylvestris, Diplodia pinea, sušica borovih poganjkov
Published in DiRROS: 12.08.2019; Views: 1837; Downloads: 114
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Keywords: varstvo gozdov, borov smolasti rak, Fusarium circinatum, Gibberella circinata, rdeči bor, Pinus sylvestris, Diplodia pinea, sušica borovih poganjkov
Published in DiRROS: 29.07.2019; Views: 2136; Downloads: 312
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Abstract: Changing climatic conditions can have various consequences for forest ecosystems, from increasing frequencies of forest fires, ice and windstorm events to pathogen outbreaks and mass mortalities. The Standardized Precipitation Index (SPI) was chosen for the evaluation of drought impact on the radial growth of trees after extensive preliminary testing of various calculated monthly climate parameters from the CARPATCLIM database. SPI was calculated for periods between 3 and 36 months for different sites (lowland and mountainous parts of Serbia, Southeast Europe), from which Quercus robur, Q. cerris, Fagus sylvatica and Pinus sylvestris samples were acquired. Bootstrapped Pearson%s correlations between SPI monthly indices and radial growth of tree species were calculated. We found that 12-month SPI for summer months may be a good predictor of positive and negative growth of different species at different sites. The strongest positive correlations for five of six tree-ring width chronologies were between 12-month June and 14-month September SPI, which implies that high growth rates can be expected when the autumn of the previous year, and winter, spring and summer of the current year, are well supplied with precipitation, and vice versa (low precipitation in given period/low growth rates).
Keywords: standardized precipitation index, SPI, climate change, tree mortality, Quercus sp., Fagus sylvatica, Pinus sylvestris
Published in DiRROS: 18.04.2018; Views: 2944; Downloads: 1683
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