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of microbiological see more Selleckchem HKI 272 processes The study of microbiological processes in the soil allows deeper analysis of changes in the structure of soil and biotic system. The focus of microbiological processes was determined using the mineralization coefficient, which permits to characterize the intensity of mineralization processes and oligotrophic index of microbial communities. It was noted that the intensity of mineralization processes was higher in variants with colloidal solution of nanoparticles of molybdenum. It should be noted that this tendency was observed in both variants with CSNM application (3.93 to 1.94). The intensity had decreased in the flowering stage, but still the figure in experimental variants was higher than in the control (1.75 to 1.35) (Figure 1). The oligotrophic index of soils in variants with application of CSNM and microbial preparation was lowest (0.16) indicating the optimal conditions for the formation of soil microcoenosis. At this, the significant increase of number of oligotrophic microorganisms developed due to the minimal amount of organic matter in the soil and typical for the last stages of mineralization is of big interest. Thus, the oligotrophic index of soil during the flowering stage was two times higher and reached 1.35 (Figure 2). Doubling of oligotrophic

index had reflected the changes in the structure of soil microbial coenosis. Figure learn more 1 Performance orientation of microbial processes in Parvulin rhizosphere soil of chickpea plants. Plant emerging stage: (1) Control (water treatment), (2) colloidal solution of nanoparticles of molybdenum (CSMN), (3) microbial preparation, (4) microbial preparation + CSMN. Figure 2 Performance orientation of microbial processes in rhizosphere soil of chickpea

plants. Plant flowering stage: (1) Control (water treatment), (2) colloidal solution of nanoparticles of molybdenum (CSMN), (3) microbial preparation, (4) microbial preparation + CSMN. The application of colloidal solution of nanoparticles of molybdenum had enhanced the development of almost all groups of microorganisms two to three times relative to the control, mainly due to bacteria that metabolize mineral nitrogen, associative nitrogen fixation and associative oligotrophic microorganisms, that was also confirmed by the mineralization and oligotrophic indices. The application of CSNM in combination with bacterial preparation had a positive effect on the rate of transformation of organic matter, which increased threefold compared to that of the control, followed by the enhancement of mineralization processes and oligotrophic rates, indicating the improvement of trophic regime of the soil.