| Abstract: | In a field experiment the influence of different girdling patterns like wide girdling, longitudinal debarking, debarking with one or several bridges, narrow girdling and bark crushing on resin soaked wood formation (lightwood) in Pinus sylvestris L. trees was investigated. Four years after treatment the concentrations of total extractives and resin acids were measured. It is shown that treatment methods differently affected concentrations of total extractives and resin acids. Longitudinal debarking with a wide bridge and debarking with several narrow bridges were the most successful methods for lightwood induction. |
