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INFLUENCE OF THE AGROCHEMICAL TREATMENT OF OIL-CONTAMINATED SOIL ON THE ABUNDANCE DYNAMICS OF MESOPHILIC AND PSYCHROPHILIC MICROORGANISMS

Authors: Trusey I. V., Gurevich Y. L., Ladygina V. P.

The influence of a polymeric structure-formation agent, chalk and microorganisms on the numbers of mesophilic and psychrophilic microorganisms in oil-contaminated soil was estimated. A carbamide-formaldehyde structure-formation agent had the most positive effect on microbial growth. Introducing hydrocarbon-degrading bacteria and chalk influenced to a lesser degree.

EARTHWORMS (LUMBRICIDAE, ANNELIDA) AS A COMPONENT OF ARTIFICIAL FOREST ECOSYSTEMS IN THE NORTHERN CASPIAN SEMI-DESERT

Authors: Sizemskaya M. L., Vsevolodova-Perel T. S.

The results of the ongoing 50-year experiment of introduction of the Eisenia nordenskioldi species into massive oak plantations (Quercus robur L.) in the Northern Caspian semi-desert are analyzed. The change of the quantitative proportion of the dominant earthworm species due to the growth and conditions of forest cultures as well as their impact on the meadow-chestnut soils is considered.