Browse

Microbial biomass was evaluated by determining the content of soil phospholipids in the upper and illuvial horizons of different-age kastanozems and solonetzes of the Bronze Age, Early Iron Age and Medieval time, located on various soil-forming rocks, in the zone of dry steppes, as well as in modern background soils. The microbial biomass in the upper horizon of modern Kastanozem on loess-like loams was 2800 ?g per g of soil that was 3 and 4 times higher than that in the upper horizon of modern kastanozem and mode...

In a model laboratory experiment, the succession of the microbial community during the decomposition of food products of a protein (sheep meat, cow curd), lipid (sheep fat) and polysaccharides (millet) was studied. Data on the dynamics of changes in the content of organic carbon, active microbial biomass, and respiratory response to the adding the low-molecular-weight compounds (amino acids and carboxylic acids) into the soil were obtained. It was found that the slowest decomposition of fat occurs after two months...

The buried soils of kurgans that have been constructed during the arid (2200-1800 years BC) and humid periods (1300-1400 years AD) in the Volga upland and the Caspian lowlands were studied. The paleosols buried 2200-1800 years BC are characterized by significant salinity and the accumulation of easily soluble salts and gypsum in the middle part of the soil profile and the formation of characteristic salt peaks at the depth of 80-120 cm. The chemical properties of medieval paleosols buried (1300-1400 years AD) indi...

The biomass of living microorganisms determined from the phospholipid content was studied in the exposed surface soils and soils of archaeological site in the dry-steppe zone of the Northern part of the Ergeninsky Upland (Russian Federation). The studied soils were represented by Kastanozems and Solonetzes. In the exposed surface soils living microbial biomass was in average 383±47 ?g C/g in the upper horizon and consistently decreased to 32% of this level down the profile. The proportion of living microbial bioma...

For reasoned reconstruction of initial presence of various organic substrates in the soil-ground material of archaeological sites, a model experiment was performed, where the dynamics of decomposition of organic substrates of protein, lipid and polysaccharide composition by soil microbial communities was studied. The experiment was carried out on gray forest soil under optimal conditions (60% WHC, 25oC). Soil samples were enriched by one of the substrates of protein (gelatin, casein, and sheep wool), lipid (sheep ...