The effect of native strains of nodule bacteria on the development of symbiotic apparatus and on the productivity of new soybean cultivars

Abstract In 2018 and 2019, we studied new strains of nodule bacteria soybean ( Bradyrhizobium japonicum ) in comparison with the standard (Noktin A) field experiments on experimental V.S. Pustovoit All-Russian Research Institute Oil Crops (VNIIMK), Krasnodar a leached extra heavy loam weakly humus chernozem. The were strain 5/1, isolated from meadow-chernozem soil Amur region 7p, chernozem region. aim research was to evaluate their effectiveness promising cultivars Slavia, Bars, Irbis Opus by influence development symbiotic apparatus, root system above-ground vegetative mass plants phase vegetation, flowering seed-filling, as well seed yield its quality. For 2 years, average, all varying degrees contributed more intensive an increase at beginning growth season. We observed maximum biomass seedfilling Bars cultivar 5/1 – 45 48 %, respectively. However, Slavia bacterization variants this had less dry than control, 30-51 %. Overall, provided productivity but year different combinations partners (soybean rhizobia strain). highest cultivars: average over years - 0.17-0.27 t/ha (8.7-13.0 %) 0.06-0.35 (2.6-15.1 %), responsive bacterization. noted certain cultivar-strain relation preliminary complementary pairs: 7p; 5/1; standard; 7p standard.