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Query: "author" (Kraigher Hojka) .

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91.
Handbuch zum forstgenetischen Monitoring
2020, professional monograph

Keywords: gozdovi, genetski monitoring, elektronske knjige
Published in DiRROS: 25.05.2021; Views: 1482; Downloads: 1612
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92.
Manual for forest genetic monitoring
2020, dictionary, encyclopaedia, lexicon, manual, atlas, map

Keywords: forests, forest genetics, genetic monitoring
Published in DiRROS: 16.04.2021; Views: 7952; Downloads: 4189
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93.
Priročnik za gozdni genetski monitoring
2020, dictionary, encyclopaedia, lexicon, manual, atlas, map

Keywords: gozdovi, genetski monitoring, gozdna genetika
Published in DiRROS: 16.04.2021; Views: 2419; Downloads: 2485
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94.
Gozdarska znanost za prihodnje gozdove : gozdni genetski monitoring in biotska raznovrstnost v spreminjajočem se okolju : LIFEGENMON zaključna konferenca : knjiga povzetkov
2020, other monographs and other completed works

Abstract: V zborniku so zbrani povzetki predavanj in predstavitev konferenčnih plakatov.
Keywords: zborniki, povzetki, elektronske knjige
Published in DiRROS: 29.03.2021; Views: 1676; Downloads: 770
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95.
Effect of earthworms on mycorrhization, root morphology and biomass of silver fir seedlings inoculated with black summer truffle (Tuber aestivum Vittad.)
Tina Unuk Nahberger, Niccolo G. M. Benucci, Tine Grebenc, Hojka Kraigher, 2021, original scientific article

Abstract: Species of the genus Tuber have gained a lot of attention in recent decades due to their aromatic hypogenous fruitbodies, which can bring high prices on the market. The tendency in truffle production is to infect oak, hazel, beech, etc. in greenhouse conditions. We aimed to show whether silver fir (Abies alba Mill.) can be an appropriate host partner for commercial mycorrhization with truffles, and how earthworms in the inoculation substrate would affect the mycorrhization dynamics. Silver fir seedlings inoculated with Tuber. aestivum were analyzed for root system parameters and mycorrhization, how earthworms affect the bare root system, and if mycorrhization parameters change when earthworms are added to the inoculation substrate. Seedlings were analyzed 6 and 12 months after spore inoculation. Mycorrhization with or without earthworms revealed contrasting effects on fine root biomass and morphology of silver fir seedlings. Only a few of the assessed fine root parameters showed statistically significant response, namely higher fine root biomass and fine root tip density in inoculated seedlings without earthworms 6 months after inoculation, lower fine root tip density when earthworms were added, the specific root tip density increased in inoculated seedlings without earthworms 12 months after inoculation, and general negative effect of earthworm on branching density. Silver fir was confirmed as a suitable host partner for commercial mycorrhization with truffles, with 6% and 35% mycorrhization 6 months after inoculation and between 36% and 55% mycorrhization 12 months after inoculation. The effect of earthworms on mycorrhization of silver fir with Tuber aestivum was positive only after 6 months of mycorrhization, while this effect disappeared and turned insignificantly negative after 12 months due to the secondary effect of grazing on ectomycorrhizal root tips.
Keywords: mycorrhiza, truffles, silver fir, inoculation, earthworms, spore inoculation
Published in DiRROS: 22.03.2021; Views: 1017; Downloads: 706
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98.
Razmejitev provenienčnih območij gozdnih drevesnih vrst v Sloveniji na osnovi ekoloških regij
Lado Kutnar, Mitja Zupančič, Dušan Robič, Nina Zupančič, Sašo Žitnik, Tone Kralj, Irena Tavčar, Mojca Dolinar, Ciril Zrnec, Hojka Kraigher, 2002, professional article

Abstract: Zakon o gozdnem reprodukcijskem materialu, ki je bil sprejet junija 2002, v skladu z Direktivo EU o gozdnem reprodukcijskem materialu, zahteva določitev provenienčnih območij za pridobivanje in uporabo gozdnega reprodukcijskega materiala. V prispevku je predstavljen predlog oblikovanja ekoloških regij in podregij, ki so osnova za predlagano razmejitev provenienčnih območij. Meje ekoloških regij so lahko prehodne ali mozaično razporejene. Zaradi lažjega določanja provenienčnih območij na terenu in lažjega nadzora nad sadnjo oziroma setvijo so meje provenienčnih območij čimbolj prilagojene gospodarsko-ureditvenim in administrativnim mejam, ki so po možnosti označene na terenu. Predstavljene so osnove za oblikovanje in predlog razmejitve 7 provenienčnih območij, razdeljenih na štiri višinske pasove.
Keywords: ekološka regija, provenienčno območje, fitogeografska delitev, gozdni reprodukcijski material, uporaba, Slovenija
Published in DiRROS: 17.11.2020; Views: 1323; Downloads: 496
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99.
100.
Isotopic and water relation responses to ozone and water stress in seedlings of three oak species with different adaptation strategies
Claudia Cocozza, Elena Paoletti, Tanja Mrak, Saša Zavadlav, Tom Levanič, Hojka Kraigher, Alessio Giovannelli, Yasutomo Hoshika, 2020, original scientific article

Abstract: The impact of global changes on forest ecosystem processes is based on the species-specific responses of trees to the combined effect of multiple stressors and the capacity of each species to acclimate and cope with the environment modification. Combined environmental constraints can severely affect plant and ecological processes involved in plant functionality. This study provides novel insights into the impact of a simultaneous pairing of abiotic stresses (i.e., water and ozone (O3) stress) on the responses of oak species. Water stress (using 40 and 100% of soil water content at field capacity - WS and WW treatments, respectively) and O3 exposure (1.0, 1.2, and 1.4 times the ambient concentration - AA, 1.2AA, and 1.4AA, respectively) were carried out on Quercus robur L., Quercus ilex L., and Quercus pubescens Willd. seedlings, to study physiological traits (1. isotope signature [delta 13C, delta 18O and delta 15N], 2. water relation [leaf water potential, leaf water content], 3. leaf gas exchange [light-saturated net photosynthesis, Asat, and stomatal conductance, gs]) for adaptation strategies in a Free-Air Controlled Exposure (FACE) experiment. Ozone decreased Asat in Q. robur and Q. pubescens while water stress decreased it in all three oak species. Ozone did not affect delta 13C, whereas delta 18O was influenced by O3 especially in Q. robur. This may reflect a reduction of gs with the concomitant reduction in photosynthetic capacity. However, the effect of elevated O3 on leaf gas exchange as indicated by the combined analysis of stable isotopes was much lower than that of water stress. Water stress was detectable by delta 13C and by delta 18O in all three oak species, while delta 15N did not define plant response to stress conditions in any species. The delta 13C signal was correlated to leaf water content (LWC) in Q. robur and Q. ilex, showing isohydric and anisohydric strategy, respectively, at increasing stress intensity (low value of LWC). No interactive effect of water stress and O3 exposure on the isotopic responses was found, suggesting no cross-protection on seasonal carbon assimilation independently on the species adaptation strategy.
Keywords: ozone, gas exchange, English oak, holm oak, downy oak, Quercus ilex L., Quercus robur L., Quercus pubescens Willd
Published in DiRROS: 11.08.2020; Views: 1729; Downloads: 1063
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