20.500.12556/RUL-144112 Električna upornost tkiv, prirastne značilnosti in odziv na poškodbe pri zdravih in obolelih jelkah doktorska disertacija Electrical resistance of tissues, increment characteristics and response to injuries in healthy and diseased silver firs Prirastne značilnosti, distribucija vode v drevesu, horizontalna in vertikalna električna upornost živih tkiv in odziv na mehanske poškodbe so bile proučene pri 35 posekanih in 428 rastočih jelkah (Abies alba Mill.) z dveh reprezentativnih dinarskih jelovo-bukovih rastišč (Bistra in Ravnik). Radialna rast v prsni višini se je izkazala kot najbolj občutljiv kazalec prizadetosti oz. zdravosti drevesa. Za prizadete jelke je značilna dehidracija beljave in pojav mokrin na lokaciji neobarvane jedrovine, ki radiirajo v beljavo ("patološko mokro srce"). Horizontalna (pri stoječih drevesih) in vertikalna (na prečnih prerezih kolutov) električna upornost živih tkiv senzitivno karakterizirata zdravstveno stanje ali cenotski status dreves. Reakcija dreves na poškodbe je večterna in se odraža kot (a) "fosilizacija" starejših diferencirajočih se celic v kambijevi coni, (b) v močni parenhimatizaciji zaradi sproščanja skorjinega tlaka in rastnih napetosti v lesu (nastanek barierne cone) ter (c) "juvenilizaciji" in (d) deorientaciji po poškodovanju. Growth characteristics, water distribution in stems, horizontal and vertical electrical resistance of living tissue, and response to mechanical injury were studied on 35 felled and 428 growing silver fir (Abies alba Mill.) trees from two representative Dinaric silver fir-beech stands (Bistra and Ravnik). Radial growth at breast height proved to be the most sensitive indicator of tree health. Affected silver fir trees are characterised by dehydration of the sapwood and the appearance of wet wood at the location of the uncoloured heartwood radiating into the sapwood ('pathological wet heart'). The horizontal (in standing trees) and vertical (in cross-sections of the discs) electrical resistance of living tissues is a sensitive indicator of tree health or social status. The response of trees to wounding is diverse and manifests itself in (a) 'fossilisation' of older differentiating cells in the cambium zone, (b) severe parenchymatization due to the release of bark pressure and growth stresses in the wood (formation of the barrier zone), and (c) 'juvenilisation' and (d) disorientation of cells after wounding. jelka Abies alba Mill. rast prirastek vlažnost lesa anatomija skorje električna upornost živih tkiv poškodbe Silver fir Abies alba Mill. growth increment wood moisture content bark anatomy electrical resistance of living tissues wounding true false false [K. Čufar] Slovenski jezik Angleški jezik Doktorska disertacija 2023-02-01 12:24:14 2023-02-01 12:24:16 2023-02-03 03:12:36 0000-00-00 00:00:00 1990 0 Ljubljana 1990 Ljubljana II-VII/9, 167 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*181.45(497.12)(043.3) 24729856 DR_Cufar_Katarina_1990.pdf DR_Cufar_Katarina_1990.pdf 1 46912030313CDD8BEE433055553FF420 dea3b6b173fddf955553a74fd9e8de197de350114a0356fd5e67b7b7b7da34f4 17734659-a223-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166255 Biotehniška fakulteta 0 0 0