Vegetation cover succession and its role in composition of water-soluble organic compounds in soils of cut areas

The paper deals with impacts of clear cuttings in spruce forests on content and composition of water-soluble components of soil organic matter. Low-molecular-weight organic substances in podzolic texturally-different soils under bilberry spruce forests and cut areas include 26 compounds of 12 carbonic acids, 10 carbohydrates, and 4 alcohols. The most popular water-soluble carbohydrates are galactopyranose, mannose, and D-ribose, alcohols - glycerin and erythrin, organic acids - glyceric, glycolic, and lactic acids. Soils at cut areas increase in total carbon content of water-soluble organic compounds and decrease in concentration of low-molecular-weight organic acids, alcohols, and carbohydrates.