Abstract:
The soils of the Alakol depression are investigated. The physical and chemical properties of brown,
meadow-brown and gray-brown soils, meadow saline, sands of ridge-hummocky half-fastened, marshy (flood plain)
soils, also the gross content and concentration of the mobile form of manganese (Mn) are considered. The concentration of the elements was studied by profiles of soils. The gross content and concentration of the mobile form of
Mn in soils were determined by the atomic absorption method. The statistical processing of the obtained data was
carried out by N. A. Plokhinsky using Microsoft Excel. The level of the concentrations of the element under investigation is estimated, and the character of its intra-profile distribution is considered. The coefficients of the correlation
dependence of manganese content on the physicochemical properties of soils are calculated. Investigations were
carried out to determine the content of total manganese and its exchange form in soil-forming rocks and soils of the
Alakol depression, and their ecological and geochemical assessment was given. Specifically, the content and distribution of gross manganese in soils and the correlation dependence on the clay fraction, carbonates, pH of the
medium. It was revealed that in the mobile pool of manganese compounds in soils, the share of the mobile form
accounts for 10.5% of the gross content. The information obtained on the content and accumulation of manganese
reflects the patterns of distribution of Mn in the desert soils of the Alakol depression. Their basic physicochemical
properties, the gross content and the exchange (mobile) form of Mn are determined.
