Longitudinal analysis of annual height increment differentiation in Scots pine (Pinus sylvestris L.) stands of different age classes

Autorzy

• Bogna Zawieja Poznań University of Life Sciences, Department of Mathematical and Statistical Methods, Wojska Polskiego 28, 60-637 Poznań, Poland
  phone: +48 61 8487153, e-mail: bogna13@up.poznan.pl
• Katarzyna Kaźmierczak Poznań University of Life Sciences, Department of Forest Management, Wojska Polskiego 71c, 60-625 Poznań, Poland

Abstract

In the study, the measurements of Scots pine height increments were used to compare the increments of pine trees of different age classes. All of the analyzed trees were growing in stands located on fresh mixed coniferous forest sites. The study concerned a 10-year period of growth of 8 tree age classes. Due to variation in climate conditions, all trees were studied over the same calendar period. Longitudinal analysis was used to compare different age classes of trees with reference to the increments in height. This procedure had not been previously used for such purpose. The results obtained did not confirm the hypothesis of parallel profiles implying that there existed differences in the growth of trees in various age groups.

Keywords

• age group
• forests productivity
• profile analysis
• longitudinal data