Uszkodzenia drzew i gleby przy pozyskiwaniu drewna w wybranych rębniach złożonych na terenach nizinnych

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

Abstrakt

Four technological processes of wood harvesting in the shelterwood or selection cutting methods on lowland were investigated in four mixed stands, two of them were dominated by Scots pine and other two with majority of

European beech. Short-wood (cut-to-length) method was used in the two processes while the whole-stem system in the other two. In all cases the chain saw was used for felling and other technological operations. Forwarder and skidder were than applied for wood extraction; the distances between the strip roads were 30 and 60 m. The lowest level of tree damage (12,5% of injured trees and 6,2% of synthetic tree damage index) and soil disturbances (synthetic soil disturbance coefficient 4,0%) was obtained for the short-wood method with the use of forwarder for wood extraction and for 30 m distance between the strip roads. Highest level of tree damage was reached in the whole-stem method with the application of skidder for the wood extraction. For the 30 m and 60 m distances between the stripe roads the share of damaged trees was 20,5% and 19,6%, respectively the index – 11,5% and 10,9%, while the soil disturbance 7,8% and 8,4%.

Słowa kluczowe

• Shetlerwood cutting system
• tree injury
• soil disturbance
• wood harvesting