20.500.12556/RUL-15743 Kompleksna presoja odvzema lesne biomase iz ekosistema v tehnološke namene diplomsko delo - univerzitetni študij Diplomska naloga se osredotoča predvsem na ekološke vidike odvzema lesne biomase iz gozda in v tej luči primerja sortimentno in drevesno metodo sečnje na podlagi vsebnosti hranilnih elementov v različnih delih drevesa. Osnovna predpostavka je, da je iznos hranil pri sortimentni tudi metodi največji dopusten z vidika trajnostnega izkoriščanja gozdov. Zato je potrebno pri drevesni metodi sečnje višino poseka zmanjšati. To smo ugotavljali ločeno za iglavce in listavce ter po starostnih razredih, za listavce tudi pri zimski sečnji. Model je izdelan na podlagi pregleda literature. Dobljeni rezultati potrjujejo hipotezo, da z je drevesno metodo iz gozda iznešen bistveno večji delež hranil kot pri sortimentni metodi. Ugotovljena višina korigiranega poseka bi znašala pri listavcih 60 %, pri iglavcih pa 50 % v primerjavi z posekom pri sortimentni metodi. Proučevali smo tudi razliko med vsebnostjo hranilnih elementov v zelenih listih in v listni stelji. Iz tega smo določili višino poseka pri zimski sečnji listavcev z drevesno metodo. Poleg tega so v obzir vzeti tudi tehnološki in ekonomski vidiki obravnavane problematike. The thesis is based especially on ecological aspect of wood biomass removal from the forests. Thus, it compares the length-tree harvest method with the whole-tree harvest method, on the basis of the quantity of nutrients present in different tree compartments. The basic assumption is that the nutrients' removal in the length-tree harvesting method is the highest admissible from the perspective of sustainable slash management of forests. Therefore, it is necessary to decrease the slash amount in the whole-tree harvesting method. This was established separately for the conifers and deciduous trees and according to age groups. The model is completed on the basis of literature examination The obtained results confirm the hypothesis that the whole-tree harvesting method removes a much larger part of nutrients compared to the length-tree harvesting method. The established percentage of corrected slash should amount to 60 % with deciduous trees and 50 % with coniferous tress, in comparison to the slash using the lenght-tree harvesting method. We also determined the amount of slash in winter harvest of deciduous trees with the whole-tree harvesting method. The technological and economic aspects of the discussed topic have also been considered. biomasa gozdna biomasa odvzem hranil zaloga hranil drevesna metoda sečni ostanki true false false [S. Grbec] Slovenski jezik Neznan jezik Diplomsko delo 2014-07-11 13:42:32 2014-07-11 13:42:32 2022-07-11 16:51:13 0000-00-00 00:00:00 2009 0 Ljubljana 0 IX, 64 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*6 2341030 UNI_Grbec_Samo_2009.pdf UNI_Grbec_Samo_2009.pdf 1 B901D91A451B07220B898315D9AAE55D b7a8d094ebeac74a1d9a512b88ccf88d4eb3eed2e58776382082da98b8ebb81a 6d445a47-a1b8-11eb-a523-00155dcfd717 20.500.12556/rul/a8da7339-2b19-4a2f-94e6-8578b15c9669 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=127890 Biotehniška fakulteta 0 0 0