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2021, № 5 (47) |
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SOIL SCIENCE
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Polyakova N.V., Lavrinova M.G., Kulagina N.A., Volodina E.N. |
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The number and composition of the main groups of microorganisms in alluvial drained soils, depending on the type of land, the use of fertilizers and biological products |
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The paper considers the results of studying the number and composition of the microbiological community of alluvial bog soils formed in the floodplain of the Kudma River, Bogorodsky District, Nizhny Novgorod Region. The microbiological pool of the soil was estimated on the basis of counting the total number of colonies on nutrient media: MPA, KAA, Gauze No. 1, Chapeka-Doksa, Golodny agar. Studies have established that the largest microbial pool is possessed by the soils of an 18-year old fallow, the lowest - by the soils of an undrained area; on the plots used for haymaking and arable land, the total number of microorganisms was 1.5 times lower than in the fallow. The most common in the studied soils were representatives of the heterotroph group (MPA medium). The composition of microorganisms was determined by subtype differences between soils, the degree of hydromorphism, and the type of land. According to the results of the vegetation experiment, it was found that the number and composition of the soil microbiota depended to a greater extent on the temperature regime and biological products; the greatest positive effect was produced by preparations containing strains of nitrogen-fixing microorganisms.
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