Quantitative characteristics of the main types of useful plants in highly productive spruce forests of the Okhtinsky forestry

Materials are presented on assessing the quantitative characteristics of the main species of useful plants in highly productive spruce forests of the Okhtinsky district forestry of the Scientific and Experimental Forestry of the Leningrad region. The species composition, occurrence, projective cover and phytomass of plants of raw material importance have been established. It has been shown that, depending on the characteristics of the dominant and the edifier, the species composition and quantitative characteristics of raw plants in the living ground cover differ significantly. The density of the forest stand and the density of the crowns are the main factors on which the species composition, occurrence, projective cover and phytomass of plants in the living ground cover depend. With a crown closure of 89% and a stand density of about 1.1 thousand /ha, 14 species of vascular plants were recorded under the canopy of the sour spruce, and with a crown closure of 73% and a stand density of 745 specimens /ha - 25 species. Several species of mosses belonging to the class of leaf-stem mosses - dicranums, Schreber moss, rhytidiums, cuckoo flax - were identified in the composition of the moss-lichen layer at both the first and second experimental sites. The raw material value is 12 species under the canopy of dense spruce and 20 species under the canopy of sparse spruce. According to the magnitude of occurrence and projective cover, the predominant species include sourdough, mayberry, and buckthorn. The phytomass is dominated by green mosses and thistles. The obtained results can be used to replenish the database on raw plants and species diversity of indigenous spruce forests of the taiga zone of the European part of Russia. The purpose of the study is to assess potential raw materials in highly productive spruce forests.

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