Влияние структуры древостоя на плотность древесины сосны и ели в черничном типе леса

Abstract

Mixed stands of spruce and pine of myrtillus y forest types occupy large areas of the forest
 fund of the Leningrad region. For the theory and practice of forestry it is important to know the impact
 of plantations on the density of wood in bunk mixed spruce-pine stands. In mixed stands of
 pine and spruce disks and cores of wood species were selected from the model tree to determine the
 basic density by the method of maximum water capacity. The study of basic wood density of pine
 and spruce in the coniferous bunk stands revealed that its rates are higher for both species in the
 mixed forest stand than in pure coniferous plantations in the region of the study. With the predominance
 of pines in the stand composition, its wood density is higher than in stands dominated by
 spruce. Density of pinewood increases from smaller to larger classes of stand diameters. Variability
 of wood density by diameter of trunk is higher in spruce than in pine in mixed stands. In stands, after
 cutting dilutes the density of pinewood is lower than in the plantation, which is not passed with
 felling. In the bunk spruce-pine the stand, to the age of maturity, larger mass of stem wood of coniferous
 species is formed than in the pure one-tier stands of pine or spruce. Developed regression
 equations depending on the density of the wood at a height of 1.3 m to the average density of trunk
 allow for a more accurate assessment of this parameter in mixed stands than previously published
 equations for pure stands of myrtillus forest types for the study area.