20.500.12556/RUL-69672 Presoja koncepta zgodnjih redčenj z vidika porabe energije in poškodb sestojev Critical evaluation of frequent thinnings from the aspect of energy consumption and damage in the stands Del sonaravnega pristopa temelji na negi gozda, ki jo opravljamo v kasnejših razvojnih fazah hkrati s sečnjo. Učinek negovalnih ukrepov v mlajših razvojnih fazah je največji, vendar je to načelo prav tu soočeno z ostrimi ekonomskimi omejitvami. Slednjim se pridružijo tudi naraščajoče poškodbe stoječega drevja, ki zmanjšujejo dolgoročne ekonomske učinke nege gozdov. Na primeru modelnega sestoja smo izračunali naraščanje deleža poškodb stoječega sestoja po redčenju ter porabo goriva pri sečnji, spravilu in prevozu lesa. S kasnejšimi in manj pogostimi redčenji bi lahko dobili več vredne sortimente z manjšo porabo goriva in boljšim ekonomskim rezultatom. Sedanje tehnologije pridobivanja lesa niso dovolj prilagojene intenzivnemu gospodarjenju na načelih sonaravnosti, trajnosti in večnamenske vloge gozda. Med razlogi za to trditev je visok delež poškodovanih dreves pri vsakokratni sečnji (okoli 20%). Kjer je mogoče, bi morali uporabiti tehnologije kratkega lesa. Priprava dela bi morala biti izpeljana bolj pazljivo. A part of co-natural approach is based on tending the stands, which is done repeatedly with the thinnings. The effect of tending is highest in young development phases but in these phases this principle is faced with strongest economical limitations. The consequences of the cuttings in younger phases are also damages of the standing trees which remain in the stands for a long time - until the end of the rotation period. Accumulated damages of the standing trees seriously endanger the positive effects of the tending. Evaluating the above statements, we used a mathematical model and simulations. With later and less frequent thinnings we could probably get higher value of wood with less energy consumption and with better economical result. Present technologies of felling trees and long wood extraction are not adapted to intensive forest management on the principle of co-natural, sustainable and multifunctional forest management. One of the reasons is a very large share of damaged remaining trees during every forest operation (around 20%). Where possible, the technologies should be changed to shortwood systems. Forest operations should be planned and done much more carefully. pridobivanje lesa redčenje nega gozda poškodba drevja poškodba sestoja smreka poraba goriva sečnja spravilo lesa prevoz lesa strošek kalkulacija model gospodarjenje z gozdom forest operations spruce model tree damage forest damage spruce fuel cutting logging transport forest management true false false Slovenski jezik Angleški jezik Neznano 2015-07-10 21:34:01 2015-07-10 21:34:01 2024-08-10 03:59:06 0000-00-00 00:00:00 1998 0 0 Str. 55-71 Št. 56 1998 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*62:630*46 0351-3114 432038 Ko%2B%C3%ADir%2C_56.pdf Ko%2B%C3%ADir%2C_56.pdf 1 B608089DBD087B88A425240C1C4679EA 504f6d6121954dd4e6fe4e633b7cfe3510b75648cb0cad51f6c42eaf46d7d27d 7017b4d6-a1b3-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=100965 Biotehniška fakulteta 0 0 0