Variation of diameter at breast height increment values of single tree by planning period, age class, and social class: Study case of Scots pine stands from Sarıkamış region

Abstract

Scots pine (Pinus sylvestris L.) is an ecologically and economically important tree species. In Sarıkamış region, one of the important distribution areas of Scots pine, the effects of planning period, age class and social class of the tree on single tree diameter at breast height increment were investigated. For this purpose, two increment pens perpendicular to each other were taken from 268 sample trees in 67 sample areas with Pressler increment borer at breast height. Diameter increments (mm) for the last 1, 3, 5, 7, 10 and 15 years were measured with the help of the increment pens. The sample trees were divided into three groups as young (age group- 1), middle (age group- 2) and old (age group- 3) in terms of age and into four groups as dominant, codominant, suppressed and subdominant in terms of social class. Diameter at breast height-diameter increment values in a single tree were compared by paired t test. Diameter increments in 10-year periods were selected as control group. As a result of the comparison, dominant and codominant trees as social class; 10, 15 and 7-year periods for age group 1; 10, 7 and 15-year periods for age group 2; and 15, 10 and 7-year periods for age group 3 were more successful in explaining diameter increment in single tree.

Keywords

• çap artımı
• periyot süresi
• sarıçam
• sosyal sınıf
• tek ağaç
• diameter increment
• planning period
• scots pine
• social class
• single tree