1591. The effect of crown social class on bark thickness and sapwood moisture content in Norway spruceLuka Krajnc, Jožica Gričar, 2020, original scientific article Abstract: The research study examined the effect of tree properties (crown social class, diameter at breast height (DBH), and tree height) on bark thickness (BT) and sapwood moisture content (SMC) in Norway spruce (Picea abies (L.) H. Karst.). Both examined variables were shown to be positively affected by DBH and tree height. The relationship between DBH and SMC varied among crown social classes, while the relationship between DBH and BT was relatively constant across crown social classes. Crown social class had a relatively small effect on BT and SMC, having a more pronounced effect on SMC than on BT. The relationship between tree height and BT did not vary across crown social classes, while the relationship between SMC and tree height was found to change slightly across crown social classes. Measurements of BT and SMC in the field are affordable, fast, and easy to use. Both variables could potentially be used to improve predictions of bark beetle attacks, as they reflect the physiological state of an individual tree.
Keywords: Picea abies, tree diameter, tree height, crown social class, phloem, sapwood
Published in DiRROS: 14.01.2021; Views: 1214; Downloads: 1028
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1592. Preverjanje kratkoročnih napovedi sanitarnega poseka smreke in jelke zaradi podlubnikov v Sloveniji v 2020Nikica Ogris, Maarten De Groot, 2020, short scientific article Keywords: navadna smreka, Picea abies, bela jelka, Abies alba, sanitarni posek, napovedi, ogroženost, modeli, validacija, zmogljivost, zanesljivost, točnost, natančnost, AUC, občutljivost, specifičnost
Published in DiRROS: 14.01.2021; Views: 1054; Downloads: 1096
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1593. Predlogi postopkov za določitev optimalnega števila in lokacij kontrolnih pasti, kontrolnih nastav in lovnih nastav za osmerozobega smrekovega lubadarja (Ips typographus)Nikica Ogris, Marija Kolšek, Maarten De Groot, 2020, short scientific article Keywords: kontrolna past, kontrolna nastava, lovna nastava, optimizacija, protokol, osmerozobi smrekov lubadar, Ips typographus, smreka, Picea abies, spremljanje, monitoring
Published in DiRROS: 14.01.2021; Views: 1048; Downloads: 753
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1594. Not every edible orange milkcap is Lactarius deliciosus : first record of Lactarius quieticolor (sect. Deliciosi) from BrazilAlexandre G. S. Silva-Filho, Marcelo Aloisio Sulzbacher, Tine Grebenc, Felipe Wartchow, 2020, original scientific article Keywords: ectomycorrhizal fungi, edible mushroom, Russulaceae, Pinaceae, pine plantation
Published in DiRROS: 14.01.2021; Views: 1016; Downloads: 760
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1595. Namestitev zvočnih in svetlobnih (modrih) odvračal za divjad na odsekih državnih cest v letih 2018-2020 : poročilo monitoringa za sklopa 1 in 2Samar Al Sayegh-Petkovšek, Urška Kunej, Ajša Alagić, Katarina Flajšman, Tom Levanič, Boštjan Pokorny, 2020, treatise, preliminary study, study Keywords: monitoring, trki vozil z divjadjo, omilitveni ukrepi, zvočne odvračalne naprave, svetlobni odsevniki, prostoživeči parkljarji, srnjad, jelenjad, divji prašič
Published in DiRROS: 14.01.2021; Views: 1342; Downloads: 405
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1596. Divjad v naseljih, na cestah in drugih nelovnih površinah: težave, izzivi in rešitve (V4-1825) : ciljni raziskovalni program ˝Zagotovimo.si hrano za jutri˝ : končno poročiloBoštjan Pokorny, 2020, final research report Keywords: divjad, naselja, urbani ekosistemi, nelovne površine, konflikti, parkljarji, male zveri, nutrija, sobivanje
Published in DiRROS: 14.01.2021; Views: 1212; Downloads: 402
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1597. Sistem opredelitve rabe tal na ploskvah nacionalne gozdne inventure 2020 (gozd/drugo gozdno zemljišče/negozd) : navodila za kabinetno deloMitja Skudnik, Andrej Grah, Marko Kovač, Anže Martin Pintar, Špela Planinšek, 2020, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: nacionalna gozdna inventura, definicija gozda, raba zemljišč, gozdovi, negozdne površine
Published in DiRROS: 14.01.2021; Views: 1331; Downloads: 0 |
1598. Decision support tool for the management of dynamic genetic conservation unitsA. Rudow, Marjana Westergren, J. Buiteveld, Václav Buriánek, B. Cengel, Joan Cottrell, G. de Dato, K. Järve, Davorin Kajba, Colin Kelleher, François Lefèvre, M. Liesebach, L. Nagy, Srđan Stojnić, M. Villar, L. Yrjänä, Michele Bozzano, 2020, final research report Keywords: decision support tool, genetic conservation
Published in DiRROS: 14.01.2021; Views: 1155; Downloads: 539
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1600. 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: 1108; Downloads: 377
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