Аграрный вестник Урала № 10 (164) 2017
Биология и биотехнологииУДК:631.6: 576.8 (571.12)
MICROFLORA OF DRAINED PEAT SOILS OF NORTHERN TRANS-URAL REGION.
The resultsof field and laboratory studies of the microflora of the drained peat soils ofNorthern Trans-Urals, used for growing of perennial grasses. It is shown thatpeat soils are characterized by specific features that lead to the formation ofa kind of microbial cenoses. The microbial association of drained peat soils isformed under conditions of high organogenicity. The most numerous group ofmicroorganisms in peat soils is bacteria. They govern the flow and activity ofkey microbial processes. The total number of microflora varies significantlyalong the soil profile, due to its genesis. There is a negative highassociation between nitrifying bacteria (r = –0.85), cellulose-decomposing (r =–0.70) and bacteria that decompose organic nitrogen. The predominance in thepeat soils of microorganisms that assimilate mineral forms of nitrogen overthose that utilize its organic compounds proves the increased oligotrophy ofthe habitat for carbon and nitrogen. The number of organisms decomposingorganic nitrogen is larger in the plow layer. With depth, their number becomessmaller. The results of the studies characterize peat soils as poor in terms ofthe number of microorganisms of the main physiological groups.
Keywords:
peat soil, microflora, bacteria, actinomycetes, nitrifiers, organic matter, correlation.
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