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https://doi.org/https://doi.org/10.5552/crojfe.2025.2507
Harvester Efficiency During Thinning Operations in Alder Planted Stands with Some of Coppice Origin
Martyna Rosińska
; University of Life Sciences Faculty of Forestry and Wood Technology Department of Forest Utilisation Wojska Polskiego 71A 60-625 Poznań POLAND and The State Forests National Forest Holding Osusznica Forest District Osusznica 3, 77-130 Lipnica POLAND
Mariusz Bembenek
; University of Life Sciences Faculty of Forestry and Wood Technology Department of Forest Utilisation Wojska Polskiego 71A 60-625 Poznań POLAND
Rodolfo Picchio
; University of Tuscia Department of Agriculture and Forest Sciences (DAFNE) Via San Camillo de Lellis 01100, Viterbo ITALY
Zbigniew Karaszewski
; Łukasiewicz Poznan Institute of Technology Research Group of Chemical Technology and Environmental ProtectionWiniarska 1, 60-654 Poznań POLAND and Onliwood – Wood Trading Portal Łąkowa 96, 26-616 Radom POLAND
Stelian A. Borz
; Transilvania University of Brasov Faculty of Silviculture and Forest Engineering Department of Forest Engineering Forest Management Planning and Terrestrial Measurements Şirul Beethoven 1 500123, Brasov ROMANIA
Piotr S. Mederski
; University of Life Sciences Faculty of Forestry and Wood Technology Department of Forest Utilisation Wojska Polskiego 71A 60-625 Poznań POLAND
Sažetak
In Central European conditions, harvester use becomes more popular for broadleaved tree species, though there are still some difficulties with effective delimbing of satisfactory quality. Considering these issues, economic aspects are ultimately crucial when deciding on the use of harvesters and assessing the effectiveness of their productivity. The objective of the present research was to apply different harvesters in thinning of alder stands to determine their productivity level focusing on the use of tree trunk for logs. The study was carried out in alder stands under thinning where five different harvesters were used in nine stands, five of which were of coppice origin. Additionally, in six cases, harvesting was done after the growing season and in three cases during the growing season, when trees were covered with leaves. An average productivity was 14.42 m3 PMH0-1, with maximum values of 24.34 m3 PMH0-1 in a coppice stand, and 23.66 m3 PMH0-1 in a planted stand. Delimbing was carried out in the tree crowns with the mean diameter as small as 7.9 cm under bark, which shows very good use of the tree trunk for logs. It was also established that the thicker the tree, the bigger the top diameter of the last log, leading to bigger biomass production, e.g. for energy purposes, but also with smaller effectiveness of log processing.
Ključne riječi
cut-to-length, CTL, broadleaved tree species, productivity, harvester head
Hrčak ID:
326347
URI
Datum izdavanja:
17.1.2025.
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