Comparative analysis of the composition of water extracts and soil solutions from peat gleyic podzolic soils of the Central Forest State Biosphere Reserve

The composition of soil solutions obtained by vacuum filtration from peat gleyic podzolic soils of the Central Forest State Biosphere Reserve under field conditions was determined. It was found that the composition and properties of the soil solutions reliably differ from those of the water extracts. The natural solutions are characterized by higher concentrations of metals (primarily of Na, K, Ca, and Cu), an increased content of the hydrophobic fraction of water-soluble substances, an order of magnitude lower carbon content, and lower values of the actual and potential acidity.