Wpływ procesów technologicznych na wydajność pracy i koszty pozyskiwania drewna w drzewostanach sosnowych starszych klas wieku. Cz. II. Zręby zupełne

Autorzy

• Marian Suwała Instytut Badawczy Leśnictwa, Zakład Użytkowania Lasu, Sękocin Stary, 05-090 Raszyn, Poland, fax +48 227153557, e-mail: m.suwala@ibles.waw.pl
• Krzysztof Jodłowski Instytut Badawczy Leśnictwa, Zakład Zarządzania Zasobami Leśnymi, Sękocin Stary, ul. Braci Leśnej 3, 05-090 Raszyn
  Tel. +48 22 7150346, e-mail: K.Jodlowski@ibles.waw.pl

Abstrakt

Investigations were performed in two Scots pine stands differed in average tree volume (0,4 m3 and 0,7 m3). In both cases four technological processes of wood harvesting were tested: two of whole-stem method and two of short-wood method. Chain saw or one arm harvester was used for felling and other technological operations while skidder or forwarder (whole-stem methods) and only forwarder (short-wood methods) for wood harvesting. The highest productivity (96,0-63,5 and 109,0-72,8 m3/8 machine hours for the average tree volume 0,4 m3 and 0,7 m3 accordingly and 100-1000 m of extraction distance) was obtained for short-wood method that applied harvester and forwarder. This method was also characterized by the lowest unit cost of wood harvesting: 18,7-26,3 zł/m3 for 0,4 m3 trees and 16,0-22,4 zł/m3 for 0,7 m3 trees with the extraction distance ranged from 100 m to 1 km (with the use of machinery equal to 1600 hours/year).

Słowa kluczowe

• clear cuts
• unit cost
• productivity
• wood harvesting
• Scots pine