Virgin spruce forests of the subzone of the middle taiga
The results of investigations of the spruce forests of the subzone of the middle taiga are presented. On the territory of the Komi Republic in the middle sub-zone of the taiga, spruce forests grow on an area of 6.74 million hectares, of which 74% are concentrated in mature and overmature plantings. Middle-earth indigenous spruce stands are represented by phytocenoses of green-moss (47.6%), haircap-moss (36.8%), grass (3.2%), sphagnum (12.2%), lichen (0.2%) groups of types. The stands of old-growth spruce forests are mainly mixed in composition, IV-V (rarely III), the class of bonitet, 0.6-0.9 complete, with a stock of wood from 100 to 420 m3 / ha. In phytocenoses of virdin spruce forests, from 150 to 220 tons / ha of organic mass or from 75 to 91 tons / ha of carbon accumulate. The annual production of phytomass, depending on the type of forest, varies within 5.2¸ 10.2 t / ha. The timber reserves in the spruce forests of the middle taiga are 1.08 billion m3, including 795 million m3 in the forests designated for felling of the main use. Approximately 91% of its volume is concentrated in mature and overmature stands and form the basis of the explotation fund in Komi Republic