Distribution of intermediate and mature wood on the longitudinal cross section of the tree trunk and selected biometric traits of Scots pine (Pinus sylvestris L.)

The study presents an analysis of the occurrence of transition and mature wood in the stem profile of Scots pine trees. For this purpose, 10 experimental plots were established in the Miastko Forest District, which comprised two forest site types, fresh coniferous forest and fresh mixed coniferous forest, as well as five age classes, i.e. class II, III, W. V and VI, and in each plot three model trees were selected. Correlations were found e.g. between the height of the tree. the length and diameter of its crown and the vertical range of the occurrence of transition and mature wood. The described correlations may be used as an easy method for the determination of the vertical range of the occurrence of transition and mature wood. In addition, it has been demonstrated that in the stem profile both the transition and mature wood is formed in this zone of the stem on which the live part of the crown is set.