Abstract
The study demonstrated that the carbon content of humus and microbial biomass in the soils of successional ecosystems formed in the floodplain of a drying salt lake gradually increases and at the last stages of development reaches the values of zonal chernozem soils of the Baraba plain. The process of accumulation of humus and microbial biomass carbon is slowed down against the background of high salt concentrations in certain horizons of young soil profiles, so that the main reserves of humus and microbial biomass carbon are concentrated in the upper (0-10 cm) layer of emerging soils. This is especially noticeable at the initial stage and the stage of the salt community. At the last stages of succession development (the stages of solonetz and settled meadows on solonetz and chernozem-meadow soils), the reserves of humus carbon and microbial biomass significantly increase against the background of progressive processes of soil profile desalination. And at these stages, there is a significant increase in the reserves of carbon humus and microbial biomass in the 10-20 cm layer.
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