STUDY OF THE VARIABILITY OF THE PERCENTAGE OF LATE WOOD DEPENDING ON THE WIDTH OF THE ANNUAL LAYER

Abstract

The use of wood as a natural and environmentally friendly material is expanding, but to increase the rationality of its use, it is necessary to know the qualitative indicators of this variable material. They depend on the species, the age of the tree, the region and the growing conditions. Evaluation of the quality of wood involves experiments that require time and special equipment. The least time-consuming procedure for assessing the quality of wood is to use macrostructure parameters, which include the percentage of late wood and the width of the annual layer. The width of the annual layer can be easily measured not only in the laboratory, but also in the field. The purpose of the study was to establish the nature of the change in the percentage of late wood in Scots pine from the forest-steppe zone along the radius of the trunk, as well as the parameters of the width of the annual layer, at which the percentage of late wood will be of the greatest importance. The percentage of late wood affects the physical and mechanical properties of wood, the greater its value, the better the wood.