The research of stabilizators influence on the growth, viability, nodulation activity and efficiency of Bradyrhizobium japonicum was conducted. It was found, that sodium alginate in a concentration of 0,2 % has a positive influence on a growth and functional activity of rhizobia. It was established in field experiments with soybean of Poltava cultivar that presowing seed bacterization with Bradyrhizobium japonicum, that were cultivated with given stabilizator, the area of assimilatory surface of leaves, number of nodules, their mass and nitrogen-fixing activity as well as plants productivity, were increasing.

The effectiveness of pre-sowing inoculation of winter wheat seeds with Agrobacterium radiobacter204, pre-activated with nanocarboxylates of metals, and the preparation Avatar (a complex of traceelements - metal nanocarboxylates), applied in combination and separately, was studied. The combinedapplication of bacterization and a complex of trace elements positively affects the microbiocenosis of therhizospheric soil of winter wheat: an increase in the number of ammonifiers (from 43.8% to 77.1%),nitrogen-fixing bacteria (from 2.7 to 3.5 times) was noted, while the number of micromycetes reduced.Pre-sowing bacterization and application of nanocarboxylates of metals contributes to the increase of thepotential nitrogen-fixing activity of rhizosphere soil and increase of wheat yield by 24.4% compared withthe control variant.