Authors:
A. S. MOTORIN,
doctor of agricultural sciences, leading researcher,
Research Institute of Agriculture of Northern Trans-Urals – a branch of Tyumen Scientific Center of RAS (2, Burlaki Str., 625501, Moskowskiy, Tyumen region)
Abstract. The results of field and laboratory studies of the microflora of the drained peat soils of Northern Trans-Urals, used for growing of perennial grasses. It is shown that peat soils are characterized by specific features that lead to the formation of a kind of microbial cenoses. The microbial association of drained peat soils is formed under conditions of high organogenicity. The most numerous group of microorganisms in peat soils is bacteria. They govern the flow and activity of key microbial processes. The total number of microflora varies significantly along the soil profile, due to its genesis. There is a negative high association between nitrifying bacteria (r = –0.85), cellulose-decomposing (r = –0.70) and bacteria that decompose organic nitrogen. The predominance in the peat soils of microorganisms that assimilate mineral forms of nitrogen over those that utilize its organic compounds proves the increased oligotrophy of the habitat for carbon and nitrogen. The number of organisms decomposing organic nitrogen is larger in the plow layer. With depth, their number becomes smaller. The results of the studies characterize peat soils as poor in terms of the number of microorganisms of the main physiological groups.
Keywords: peat soil, microflora, bacteria, actinomycetes, nitrifiers, organic matter, correlation.
