Sofya Alekseevna Borisova

A comparative analysis of the composition of lysimetric waters for 2021–2022 was carried out. for two groups
of stationary soil lysimeters in the city. Th e fi rst group of lysimeters is formed by the system: fallow — grass
phytocenosis — overgrown fallow — spruce forest — mixed and broad-leaved plantation, developing on the
same type of mantle loam. Th e second group of lysimeters represents soils with diff erent types of tillage: conventional
plowing, extra-deep planting according to Bushinsky, plowing according to Mosolov, deep plowing
according to Kachinsky.
For both groups, the same type of migration of components is shown, in which the most migrating elements are
carbon, mono- and divalent cations, and chloride ion, with minimal migration of iron, manganese, and aluminum.
In the group of lysimeters under various types of vegetation, as the tree canopy develops and, accordingly, the
intensity of the biological cycle increases in migrating waters, the concentration of such important biophilic elements
as magnesium, calcium, potassium, and carbon increases signifi cantly, and among anions, chloride and sulfate ions.
Th is determines, within the framework of the cluster analysis, two diff erent subgroups in terms of the composition of
natural waters: the fi rst one is formed by the fallow-grass phytocenosis — overgrown fallow system, and the second
one combines tree plantations.
In the group of lysimeters with diff erent tillage, a cluster characterizes the composition of water in lysimeters with
reclamation plowing according to Mosolov and deep plowing according to Kachinsky. At the same time, individual
aggregates form lysimeters with conventional plowing and ultra-deep planting according to Bushinsky. This is explained
by the fact that in this group of lysimeters, the initially created soil profi le design is transformed, which is
characterized by the placement of eluvial and illuvial soil horizons in various combinations and at diff erent depths
depending on the type of plowing.