Study of the effectiveness of using bacteria Bradyrhizobium japonicum and Bradyrhizobium elkanii as a microbiological inoculant for soy seeds

Abstract

A current challenge in soybean cultivation is the development of biological inoculants based on symbiotic nitrogen-fixing microorganisms, which provide the crop with the necessary amount of nitrogen for full plant development and sufficient protein accumulation. In particular, biological inoculants containing live nitrogen-fixing microbial cells are in high demand. Nodulating bacteria of the genus Bradyrhizobium are considered promising candidates for such inoculants. The aim of this study was to isolate and investigate Bradyrhizobium japonicum and Bradyrhizobium elkanii and to develop a microbiological seed inoculant based on these bacteria. Optimal cultivation conditions were determined to achieve the maximum titer of viable bacterial cells. A microbiological inoculant composition was developed, and a prototype was created. Field trials of the experimental samples of the new bioproduct were conducted. The study demonstrates the effectiveness of the developed inoculant containing Bradyrhizobium japonicum and Bradyrhizobium elkanii in soybean cultivation.