STUDY OF THE DEPENDENCIES BETWEEN THE ANATOMICAL STRUCTURE AND PROPERTIES OF DOUGLAS WOOD

Abstract

The wood of coniferous tree species is mainly made up of tracheids. Abstractly viewed in crosssection, these tracheids can be considered as elements of some structure. In early wood, tracheids are larger in size and have thinner walls. In late wood, they are smaller in size and thicker cell walls. All this implies an uneven structure. The paper examines the distribution of tracheids within the annual rings. The Douglas wood is examined in a cross-section. The number of cells in the early and late wood is measured. Tangential stripes of tracheids have been examined. These stripes are arranged in a radial sequence, gradually moving away from the axis of the stem. Dependencies between the anatomical elements in the areas of early and late wood with different widths of the growth rings are sought. A correlation analysis has been made between the structure and some physical properties of the wood. The coefficient of unevenness is determined.