INFLUENCE OF THINNING CUTTINGS ON THE FORMATION OF CLEAN SPRUCE STANDS
The influence of the spatial structure indicators on the growth of the stand is pronounced during the thinning felling period. In order to study this phenomenon in the sorrel spruce forest at the age of 42 years, in which the thinning felling was carried out earlier, a test plot was laid. Based on the digital model of the trial plot, the average taxation and spatial indicators of trees were determined, cores were taken from 21 trees on the basis of a stratified sample and the average periodic radial growth over 10 years was determined. The relationship between the trunk diameter and the average distance to competitors 'trees shows an increase in the range of variation in the trunk diameter with an increase in the average distance to competitors' trees. The boundary value of the distance of 1.8 meters was determined, after which the range of variation doubles. An analysis of the average distance to competitors from their number revealed that an increase in the average distance between competitors to 1.5 meters leads to an increase in their number, a further increase in this indicator does not have this effect. The study of trunk diameter differentiation shows that trees with minimal diameters are surrounded by dominant trees, trees with a diameter close to the average are surrounded by similar trees, and large trees are adjacent to trees of different diameters. Analysis of the dynamics of radial growth confirms the influence of thinning felling on its growth. After the felling, the previously decreasing radial increment stopped at the same level for 3 years and then began to increase.