Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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DECIDUOUS AND CONIFEROUS FOREST’S SOIL ECOLOGICAL PROPERTIES OF NORTH-WEST RUSSIA MIDDLE-TAIGA ZONE

Solodovnikov A.N. 1
1 Forest Research Institute of Karelian Research Centre of RAS
Ecological properties distinctions of spruce, birch and aspen stand’s various origin soil are investigated in Middle-taiga zone of North-West Russia. Studies were done in Karelia Republic, in permanent sample plots in the Kondopoga district, in a grass-forbs birch stand with sandy-loam humo-ferric podzolic soils over loamy clays transitional to varved clays, and a grass-forbs aspen and blueberry spruce stand’s with an epigleyic clayey soil over varved clays; as well as in the Pryazha district in a bilberry-herbaceous birch stand with sandy podzolic soil over sandy-loam till and a grass-bilberry aspen stand with sandy-loam podzolic soil over sandy-loam till. Studies have demonstrated that the forest floor in deciduous forest is usually shallower than in spruce stands, but richer in nutrients. The more base-saturated deciduous litterfall reduces soil acidity. Obvious qualitative distinctions from spruce forests in the soil humus fractions ratio were identified. The features noted were the high content of Ca-bound humus fractions and the dominance of humic acids over fulvic acids in the soluble humus part of deciduous forest’s soils.