ABOUT PRELIMINARY SPRUCE REPRODUCTION CONCERVATION DURING CONTINUOUS FELLINGS

Abstract

Preservation of the forest coniferous component was evaluated at different technological processes of wood cutting areas development. Skidding of bundles of trees with tops with Russian unit-type equipment (ЛП - 19а, ЛП - 18, ЛП - 33) is possible only in drained areas. The stock of wood cutting areas should be ensured with coniferous undergrowth of mainly 1.5 m height gradation. The technological process of two kinds of wood cutting (whip and sorting one) demands to fulfill the coniferous undergrowth preservation requirements and depends only on the quality of wood cutting, but not the technical facilities. At continuous cuttings with preliminary spruce reproduction the undergrowth (trees of the 2nd layer) should be characterized with high vitality. The criteria of vitality are as follows: 10-15 cm height increase within recent period, pyramidal crown with needles, 50-60 year-old undergrowth of 5-6 m height.