Normiranje gozdnih del pri izvedbi drugega redčenja v spremenjenih gorskih gozdovih na Pohorju : diplomsko delo - visokošolski strokovni študij - 1. stopnja

Vrabič, Luka (author), Krč, Janez (mentor), Diaci, Jurij (comentor)

Pri izračunavanju stroškov gojitvenih del v mladem gozdu pogosto ne razpolagamo s podatki, ki so zbrani v postopku odkazila. V tem primeru je smiselna uporaba sistema normiranja, kjer namesto drevesa kot enote mere za ugotavljanje učinkov nastopa površina. Raziskava obravnava primernost gostote izbrancev in gostote konkurentov kot kazalcev potrebne količine dela v primerjavi s prsnim premerom, kot uveljavljenim kazalcem pri enoti mere drevo. Za ta namen je bila opravljena časovna študija izvedbe redčenja v smrekovem drogovnjaku s primesjo jelke in bukve, kjer je bilo skupno posnetih 72 popolnih ciklusov sečnje in izdelave, od tega 57 na iglavcih in 15 na listavcih. Zastavljeni sistemi normiranja temeljijo na modelu funkcijske odvisnosti, kjer poznavanje neodvisne spremenljivke omogoča bolj ali manj zanesljivo napovedovanje odvisne spremenljivke. Uporaba linearne aproksimacije se je izkazala kot ustrezna metoda za napovedovanje predvidene porabe časa. Prsni premer se je izkazal kot najnatančnejši kazalec, medtem ko sta bila kazalca gostota izbrancev in gostota konkurentov po natančnosti enakovredna. Ugotovljena je struktura delovnega časa in težavnost dela po operacijah v produktivnem času. Na podlagi ugotovljenih učinkov je v povezavi z načinom nege opravljena kalkulacija stroškov ukrepa. Podana je ocena potencialnih izboljšav sistema normiranja, ki je ključnega pomena za racionalizacijo nege.

• Language: Slovenian
• Keywords: sistem normiranja/kazalec porabe časa/enota mere
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [L. Vrabič]
• Year: 2016
• Number of pages: VII, 62 f.
• PID: 20.500.12556/RUL-115023
• UDC: 630*305(043.2)=163.6
• COBISS.SI-ID: 4598438
• Publication date in RUL: 08.04.2020

VRABIČ, Luka, 2016, Normiranje gozdnih del pri izvedbi drugega redčenja v spremenjenih gorskih gozdovih na Pohorju : diplomsko delo - visokošolski strokovni študij - 1. stopnja [online]. Bachelor’s thesis. Ljubljana : L. Vrabič. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=115023

Secondary language

• Language: English
• Title: Normalisation of forestry operations based on the performance of second thinning in secondery forests in Pohorje

Abstract

Within the process of calculating the costs of silvicultural measures in new growth forests, we frequently find ourselves deprived of data collected in the process of marking. System for standard time determination, which includes surface as a unit of productivity measurement instead of tree, is accordingly reasonable. This research is aiming to investigate adequacy of selected tree density and competitor tree density, as an indicator of time consumption in comparison to breast height diameter, as commonly used indicator in relevance to tree, as a unit of measure. Time study of thinning process in spruce pole stand with mixture of fir and beech has been conducted, where in total 72 completed felling and processing cycles has been recorded, out of which 57 were coniferous and 15 deciduous trees. Presented time standardisation systems are established on the basis of regression models, where known independent variable enables to predict more or less accurate estimates of dependent variable. Utilization of linear approximation has been recognized as adequate method in purpose of predicting time consumption. Breast height diameter has been ratified as most accurate indicator, whereas indicators selected tree density and competitor tree density are equivalent in terms of accuracy. Working time structure and work difficulty within productive time operations have been established. Cost analysis has been conducted on the basis of observed productivity in terms of particular tending concept. This research allowed us to evaluate potential improvements within time standardisation system, which is perceived to be crucial in the context of forest tending rationalization.