Soybean is one of the most important high-quality protein source for human and animal nutrition in worldwide. With the soil bacteria Bradyrhizobium japonicum symbiotically colonizing the plant’s roots, soybean are able to fix atmospheric nitrogen. Because this bacteria is not native to Hungarian soils, soybean seeds need to inoculated with Bradyrhizobium strains before sowing. There are a number of different seed and soil inoculation products which contain Bradyrhizobium strains on the market but few data are available on their efficacy and plantspecific utility. The aim of this study was: (i) to test the ability of two commercially available inoculants (inoculant 1 and inoculant 2), one arbuscular mycorrhiza (AM) product, one seed dressing product and their combination to maximize soybean yield, protein content and Pro-Fat value, (ii) to study the interaction of different inoculants with three different registered Hungarian soybean varieties (Aires, Bahia, Pannonia kincse). Small plot field trials were performed at the Szeged Research Station of Hungarian University of Agricultural and Life Sciences in 2018. Effective inoculation with Bradyrhizobium inoculant 1 and its combinations with AM product and seed dressing product significantly increased grain yield, protein content and Pro-Fat value compared with inoculant 2 and controls. Interaction between the soybean varieties and different technologies were significant for yield, protein content and Pro-Fat value. Applying the obtained results in practice can contribute to the efficiency of soybean production

soybean, Bradyrhizobium, arbuscular mycorrhiza, seed inoculation, yield, quality

field crops and pastures

Presentation: poster