Variation of form factors in black pine stands of Kastamonu region according to various single tree and stand characteristics

Abstract

The aim of this study was to examine the form factors of black pine (Pinus nigra J.F.Arnold) trees in even-aged, pure and natural stands of Kastamonu region. Data obtained from 120 sample plots taken from different site classes, canopy, development stage, ecoregion, density and age, and a total of 145 sample trees, including at least 1 sample tree with the diameter closest to the mean diameter in each sample plot, were used, and the breast height form factor (f1.3), absolute form factor (f0), natural form factor (f0.1) and artificial form factor (f0.5) were calculated with averages of 0.489, 0.317, 0.504 and 0.481, respectively. The relationships of form factors with various tree and stand characteristics were determined by statistical analysis. The results revealed that the form factors vary according to both tree and stand characteristics. The breast height form factor is correlated with all tree and stand characteristics except stand density and has differences in terms of site classes and development stages. The absolute form factor correlates with crown length and tree age and has differences in terms of site classes and ecoregions. The natural form factor correlates with all tree and stand characteristics except crown length and has differences in terms of development stages. The artificial form factor is only correlated with stand age. The success of form factors in volume calculations was also evaluated, and it has been determined that the most successful volume estimations can be achieved with the absolute form factor.

Keywords

• gövde formu
• şekil katsayısı
• ağaç hacmi
• pinus nigra
• stem form
• form factor
• tree volume
• pinus nigra