Izvorni znanstveni članak
Productivity and Cost-Efficiency of Bundling Logging Residues at Roadside Landing
Juha Laitila
orcid.org/0000-0003-4431-3319
; Finnish Forest Research Institute, (Agr. & For.) Yliopistokatu 6, FI-80101 Joensuu FINLAND
Marica Kilponen
; Lappeenranta University of Technology / John Deere Forestry Lokomonkatu 21, FI-33900 Tampere FINLAND
Nuutinen Yrjö
; Finnish Forest Research Institute, (Agr. & For.) Yliopistokatu 6, FI-80101 Joensuu FINLAND
Sažetak
The aim of this case study was to clarify the productivity and cost of a system based on bun- dling logging residues at the roadside landing with the forwarder-mounted logging residue bundler. In order to find the bundling productivity, a set of time studies was carried out, in which several working techniques were tested and evaluated. The cost-efficiency of the roadside bundling system was compared with the conventional bundling system, wherein the logging of residue logs is made directly in the terrain and, after bundling, the logging residue logs are forwarded to the roadside landing with a forwarder. The harvesting cost (bundling and forwarding) of the extracted wood biomass to the roadside landing was calculated for bundling systems using time study data obtained from this study and productivity models and cost parameters acquired from the literature.
The productivity of roadside bundling ranged from 48 to 53 logging residue logs per effective working hour (E0h), depending on the working technique used, and the mean time required to produce one logging residue log ranged from 83.6 to 92.3 seconds (E0h). The harvesting costs of the logging residue logs (€/m3) at the roadside landing were 11.5–13.7 €/m3 for the system based on bundling in terrain and 10.8–17.7 €/m3 for the system based on bundling at the roadside landing, when the forwarding distance was in the range 100–600 m and the removal of logging residues was in the range 30–90 m³/ha (m3 = solid cubic metre). According to our results, bundling at the roadside landing allowed a reduction in harvesting costs, when the forwarding distance of the logging residues was 100 m or less and removal was beyond 50 m³/ha. The cost savings were quite small, however, at 0.1–0.7 €/m³.
Ključne riječi
Bundling; logging residue logs; productivity; compaction; harvesting; forest biomass; logging residue bundler
Hrčak ID:
116775
URI
Datum izdavanja:
1.10.2013.
Posjeta: 917 *