20.500.12556/RUL-166160 Primerjava težavnosti dela ter porabe časa in goriva med izbiralnim in situacijskim redčenjem smrekovega drogovnjaka Comparison of psychophysical workload and time and fuel consumption between selective and situational thinning of spruce stand Nega gozdov v Sloveniji na letni ravni ne dosega načrtovane izvedbe, vzroki za to so različni, na primer visoki stroški dela, padec cen gozdnih lesnih sortimentov in pa nazadovanje subvencij. Vse to je privedlo do uvajanja novih načinov nege v mladem gozdu, kot je situacijsko redčenje. V nalogi smo postavili 5 raziskovalnih ploskev, kjer se je izvajalo izbiralno redčenje, in 5 ploskev, na katerih je potekalo situacijsko redčenje. Opravljena je bila časovna študija za odkazilo in za sečnjo, pri obeh procesih smo beležili pulz delavca pri delu, pri sečnji pa smo spremljali še porabo goriva ter maziva. Pri odkazilu smo ugotovili, da za situacijsko redčenje porabimo 2,2-krat manj časa kot pri izbiralnem redčenju, prav tako je bila pri situacijskem redčenju manjša težavnost dela. Pri sečnji in izdelavi na ploskvah, kjer se je izvajalo situacijsko redčenje, smo v povprečju porabili 2,5-krat manj časa kot na ploskvah z izbiralnim redčenjem. Pri situacijskem redčenju je bila manjša tudi poraba goriva in maziva, in sicer 2,2-krat manjša poraba goriva ter 2,3-krat manjša poraba maziva. Težavnost dela pri sečnji in izdelavi je bila večja pri situacijskem redčenju, kjer je povprečni utrip delavca znašal 140,4 u/min, pri izbiralnem redčenju pa 131,7 u/min. Forest tending in Slovenia has consistently fallen short of planned annual volumes due to various challenges, including high labor costs, declining timber prices and reduced subsidies. These factors have driven the adoption of innovative forest management techniques, such as situational thinning. In our thesis, we established 10 research plots: five for selective thinning and five for situational thinning. On each plot, we conducted time studies to measure the duration of tree selection and marking, as well as felling. Additionally, we recorded heart rates of the worker and measured fuel and oil consumption for both methods. The results showed that tree selection and marking on plots with situational thinning required 2.2 times less time compared to selective thinning, with lower associated physical workloads. Felling operations on plots with situational thinning were 2.5 times faster than on those with selective thinning. Fuel and oil consumption were also significantly lower with situational thinning, with reductions of 2.2 and 2.3 times, respectively. However, the physical workload during felling was higher with situational thinning, as indicated by an average heart rate of 140.4 bpm, compared to 131,7 bpm for selective thinning. These findings highlight situational thinning as time and resource-efficient alternative, albeit with some trade offs in worker physical strain during felling activities. težavnost dela redčenje poraba gorivo in mazivo drogovnjak physical workload thinning consumption fuel and lubricant pole-stand true false false [G. Grm] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-12-22 07:15:44 2024-12-22 07:15:50 2024-12-23 10:22:33 0000-00-00 00:00:00 2024 0 0 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*3:630*242(043.2)=163.6 255880 220215043 45467.pdf 45467.pdf 1 14CFA174B93E91B462C8C559C4D24069 e015a1a89e73f97a25be2a50878edf9458d75084a686f688935145b09c171062 991ea3e8-c02b-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197564 Biotehniška fakulteta 0 0 0