The quantity of particular ecological-trophic groups of microorganisms in the lentil rhizosphere under the influence of biological preparations

. In connection with the increasing application of chemical substances in the farm production, the microbial associations are being exposed to a bigger negative influence. There -fore, researching of a structure and consistency of the microbial associations is a fundamental task on the way to examine the directions of the biological processes in a soil in purpose to biologize the growing technologies of farm crops. This article presents the results of a field experiment on studying of influence of the microbial preparation ( Rhizobium leguminosarum biovar viceae strain К-29, w. s., 100 ml/hа seed rate), and the plant growth regulator Regoplant (presowing treatment of seeds 250 ml/t), with its further post-emergence application at the rates 50 ml/ha) on the microbiota quantity of particular ecological-trophic groups in the lentil rhizosphere of Linza variety. The quantity of the microorganisms in the phase of budding and blooming af ter application of the plant growth regulator was investigated on the different substrates: MPB (ammonifiers), S. M. Vynohradskoho (nitrifyiers), O. O. Imshenetskoho and L. I. Solncevoi (cel -lulolytic). The quantity of the microorganisms was denominated in colony-forming units (CFU) in 1 gram of dry soil. It is established, that developing of the ecological-trophic groups of microor ganisms in rhizosphere of the lentil was considerably activated in the case of complex application of the investigated biological preparations. The biggest quantity of the nitrifying, ammonifying and cellulolytic microorganisms in the lentil rhizosphere was noticed in the variants of the ex - periment with pre-sowing treatment of seeds with the mixture of microbial preparation ( Rhizobium leguminosarum biovar viceae strain К-29, 100 ml/hа seed rate) and plant growth regulator Regoplant (250 ml/t) with its further postemergence application at the rates 50 ml/ha, where the average exceeding compared to control was 63%, 50% and 40% for the ammonifying, nitrify - ing, and cellulolytic microorganisms. The data obtained complement the scientific understand ing of the study of the influence of biological preparations on the microbiological activity of soil microorganisms in the lentil rhizosphere and formation of perspective for the development of biologically technology of growing culture.