INFLUENCE OF DIFFERENT SYSTEMS OF CROP FARMING ON ECOLOGICAL AND TROPHIC GROUPINGS OF MICROORGANISMS OF TYPICAL CHORNOZEM IN THE CONDITIONS OF THE LEFT-BANK FOREST STEPPE OF UKRAINE

Objective. To establish the influence of different crop farming systems on parameters number representatives ecological and trophic groups microorganisms in typical chernozem. Methods. Comparative-profile-genetic, microbiological, statistical. Results. The upper 0–10- centimetre layer soil (the decreases with depth predominance microbiological activity 10–20-centimetre is possible only dry periods) characterised by highest activity. microbiocenosis undergoes greatest transformations conditions intensive system upon mixing turn a layer. This expressed significant decrease 0–10-centimetre vice versa — an increase layers 10–20 20–30 cm. Agrogenic soils have higher total compared to fallow area. most positive biogenesity was reported variants organic farming, especially use green manures. data directions development biological processes studied analysis oligotrophic coefficients, mineralization-immobilization mobilization nitrogen stock are provided. Mathematical showed sampling all microorganisms, while significantly affected microscopic fungi, actinomycetes amylolytic microbiota. Conclusion. chernozems reduces fungi. In microbiota reported. Under there decreased microorganisms. And verse, system, under manure, functional Cultivated characterized coefficient mineralization immobilization fallow.