The article provides the investigation results of the influence of different species of Lupinus L. genus from three genetic centres on the number of oligonitrophyles, bacteria utilising organic nitrogen, cellulose destructive miсroorganisms, azotobacter, micromyces and streptomyces in the rhizosphere of plants. It was shown that the number of rhizospheric microorganisms depends on the specific peculiarities of plant kinds and sorts.