The Density of Pine Wood in Drained Shrub-Sphagnum Pine Forests

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UDС

674.048

DOI:

10.37482/0536-1036-2020-2-73-80

Abstract

The density of wood is a key indicator of its quality. It is necessary to identify the factors affecting the density of wood for its effective and rational use. Knowledge of the features of wood formation in various forest growing conditions will allow to provide its well-targeted production for industrial use. Determination of pine wood density was carried out in the drained shrub-sphagnum pine forests of the Arkhangelsk forestry. Linear sample plots (20 m wide) were laid out near the drainage channel and in the interchannel space at a distance of 40 m from the channel. The distance between drainage channels is 100 m. Wood cores were selected at a height of 1.3 m on the trunk shady side and divided into parts 5 mm long. The conventional wood density was determined by the method of maximum humidity of the samples with a relatively small volume. The conventional wood density of pine in the drained shrub-sphagnum pine forests varied in the range from 0.390 g/cm³ to 0.697 g/cm³; near the drainage channel it was less in comparison with the interchannel space. The distance from the drainage channel in high-density plantations does not affect the conventional wood density. The density of pine wood in middle-aged plantations increases with increasing stand density. In mature and over-mature stands changes in the stand density do not affect the conventional wood density. The limiting values of the conventional wood density of pine are 0.486 g/cm³ with age increase and 0.532 g/cm³ with stand density increase. There is a tendency to increase the wood density with a decrease in the annual ring width. A significant correlation between the density of pine wood and the percentage of late wood was detected in middle-aged pine forests. A decrease in the wood density of the middle part of the trunk radius was found.

Authors

O.N. Tyukavina, Candidate of Agriculture, Assoc. Prof.; ResearcherID: H-2336-2019, ORCID: https://orcid.org/0000-0003-4024-6833

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: o.tukavina@narfu.ru

Keywords

drained shrubs-sphagnum pine forests, conventional wood density, stand density, hydromelioration, percentage of late wood

For citation

Tyukavina O.N. The Density of Pine Wood in Drained Shrub-Sphagnum Pine Forests. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 2, pp. 73–80. DOI: 10.37482/0536-1036-2020-2-73-80

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