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Abstract
In the vegetation experiment conditions it was established that the greatest effect of soybean bacterization can be obtained by two strains of nodule bacteria with slow (Bradyrhizobium japonicum 46) and intensive (B. japonicum КВ11) growth rates when these strains used in inoculum in the ratio 1 : 1 (binary composition). In compared to the mono-inoculation the combined use of these strains contributed the formation of balanced symbiotic system, increase the level of molecular nitrogen fixation, content of chlorophyll in the biomass leaves and above ground mass of different soybean plants varieties on 7.8–19.6 %. In a field experiment inoculation of soybean seeds with a composition of B. japonicum strains to increase the soybean yields by 11.1–13.7 % compared to the mono-inoculation.
Highlights
An important reserve to increase productivity of legumes is the use of rhizobia, which functions in plant-microbial interaction are diverse: a molecular nitrogen fixation, improved nutrition of plants, synthesis of biologically active substances, increase of plant resistance to the action of pathogens and abiotic stresses [1; 2]
It is known that in regions of intensive soybean cultivation using biological preparations based on rhizobia, soils form different population of these microorganisms in terms of density
During the study of populations of soybean microsymbionts in soils of Ukraine, among their representatives we found strains with increased growth rate, which conventionally called “strains of intense growth”
Summary
An important reserve to increase productivity of legumes is the use of rhizobia, which functions in plant-microbial interaction are diverse: a molecular nitrogen fixation, improved nutrition of plants, synthesis of biologically active substances, increase of plant resistance to the action of pathogens and abiotic stresses [1; 2]. It should be noted that the list of biological preparations for the plant production over the past decade have expanded to include preparations based on microorganisms of various functional groups and preparations of binary action, obtained as a result of a combination of several microorganisms [6]. Today, it has been experimentally proved the significant stimulating effect of the mixed cultures of microorganisms on the growth and development of plants. The authors made a conclusion about the prospects of multistrain preparations when growing peas
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