Wpływ procesów technologicznych na wydajność pracy i koszty pozyskiwania drewna w drzewostanach sosnowych starszych klas wieku. Część I. Trzebieże późne

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

5 technological processes of wood harvesting were the subjects of investigation (including 2 representing cut – to – length methods and, 3 – whole stem methods).
Forest felling and wood bucking were performed in the processes with the use of chain saw or harvester while the wood extraction by horse skidding, forwarding or skidding.
Spacing out of strip roads was as follows: 20, 30 and 50 m. The best labour productivity (47,1–36,0 m3 /8 machine hours and extraction distances 100 – 1000 m respectively) was achieved by applying harvester and forwarder in cut – to – length method. Significantly smaller costs (31,9–52,1 zł/m3 depending on the process, exploitation of machines and extraction distance 100–1000 m) – appeared in the same method with the use of chain saw, harvester or forwarder.
Also, significantly low cost (38,4 zł/m3) was characteristic for the whole stem method with the use of chain saw and horse skidding on the distance of 100 m.

Słowa kluczowe

• wood harvesting in thinnings
• labour productivity
• unit cost
• pine stands