| Popis: |
The paper discusses the research results on the influence of forest types on the wood specific gravity of Scots pine as an integral indicator of wood quality. For the study, pine stands were selected in the forest conditions of the Precarpathian region (Ukraine). In the forest type of wet pine broadleaves biotope, wood density at the moisture content of 8% varied in the range from 356 to 735 kg∙m-3 with an average value of 511 kg∙m-3 and exceeded the similar indicator in fresh pine broadleaves biotope by 11%. A linear relationship between the wood specific gravity and the number of annual tree rings in 1 cm was established, which was described by the equation of the first level. A multiple comparison of the obtained research results allowed to distinguish four groups of wood samples in relation to wood density and the number of growth rings in 1 cm. The average value of the wood density for the first group of samples with the number of annual rings less than 5 pcs.∙cm-1 is equal to 385 kg∙m-3, and for the fourth with the number of annual rings more than 16 pcs.∙cm-1 - 601 kg∙m-3. The last one was characterized by the largest range of changes of the wood density, which varied from 445 to 735 kg∙m-3. The obtained results are of practical importance for the selection of stemwood for its desired purpose. |
