Proizvodnost mehaniziranog sustava pridobivanja drva u šumskoj kulturi obične smreke (Picea abies /L./ Karsten) na području Gorskog kotara

professional thesis

• Title (english): Productivity of Mechanized Harvesting System in a Norway Spruce (Picea abies /L./ Karsten) Forest Culture in Gorski Kotar
• Author: Zoran Štimac
• Mentor: Željko Zečić (mentor)
• Committee member: Dinko Vusić (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Forestry and Wood Technology; (Institute of Forest Engineering); Zagreb
• Defense date and country: 2017-05-10, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Forestry

Abstract

U izradi rada korišteni su podaci prikupljeni na području UŠP Delnice, Šumarija Mrkopalj u GJ »Bjelolasica«. Istraživanje je provedeno u cilju utvrđivanja pogodnosti primjene skupnog rada vrhunskih strojeva, odnosno harvestera i forvardera u neprorjeđivanoj šumskoj kulturi obične smreke. Na temelju rezultata terenskog istraživanja studijem rada i vremena konstruirani su matematički modeli za izračun proizvodnosti strojne sječe i izrade te izvoženja u ovisnosti o glavnim utjecajnim čimbenicima. Troškovna je pogodnost istražena usporedbom jediničnih troškova istraživanog sustava pridobivanja drva i prosječne cijene drvnih sortimenata iz istraživane sječine. Primjena istraživanog sustava pridobivanja drva u istraživanoj smrekovoj šumskoj kulturi troškovno je pogodna. Provođenjem radova prorede skupnim radom harvestera i forvardera u istraživanoj sječini moguće je ostvariti dobit u iznosu 136,41 kn/m3, a trošak strojnoga rada u istraživanim uvjetima čini 57 % prosječne cijene drvnih sortimenata fco. šumska cesta. Za postizanje optimalnog učinka istraživanog sustava pridobivanja drva u istraživanoj sječini nužno je angažirati 1,4 forvardera za svaki harvester, a praktično je ujednačenje proizvodnosti harvestera i proizvodnosti forvardera postignuto angažmanom vozača harvestera pri popravku forvardera uz posljedično povećanje dodatnog vremena harvestera i smanjenje učinka strojne sječe i izrade.

Abstract (english)

In this work data collected in FA Delnice, FO Mrkopalj, MU »Bjelolasica« was used. The study was conducted in order to determine the suitability of application of group work by highly mechanized machinery, harvesters and forwarders, in unthinned Norway spruce forest plantation. Based on the results of the field research by time and motion study, mathematical models to calculate the productivity of mechanical felling and processing and forwarding in relation to major influential factors were constructed. Cost benefit is explored by comparing the unit costs of the studied harvesting systems and average prices of wood assortments from the researched felling site. Application of the studied harvesting system in the investigated spruce forest plantation is cost efficient. By conducting the thinning operation with the group work of a harvester and a forwarder in the researched felling site, profit can be made in the amount of 136.41 HRK/m3, and the cost of machine work in researched conditions makes 57% of the average price of wood assortments fco. forest road. To achieve optimum performance of the studied harvesting systems in the investigated felling site it is necessary to engage 1.4 forwarder units for each harvester, but the productivity balance of harvester’s productivity and forwarder’s productivity was achieved by engagement of harvester’s driver in the repair of a forwarder, with a consequent increase in harvester’s allowance time and reduction of the mechanized felling and processing productivity.

• Keywords: Harvester; forvarder; proizvodnost; troškovi
• Keywords (english): Harvester; forvarder; productivity; costs
• Language: croatian
• URN:NBN: urn:nbn:hr:108:683258
• Study programme: Title: Forestry Techniques and Technologies; Study programme type: university; Study level: postgraduate specialist; Academic / professional title: sveučilišni/a specijalist/specijalistica šumarske tehnike i tehnologije (sveučilišni/a specijalist/specijalistica šumarske tehnike i tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-10-17 12:32:09