TY - JOUR AU - Petrychenko, V. F. AU - Kobak, S. Y. AU - Temriyenko, O. A. PY - 1970/01/01 Y2 - 2024/03/28 TI - Features of symbiotrophic nutrition and yield formation of soybean varieties under conditions of the right-bank Forest-Steppe JF - Feeds and Feed Production JA - FFP VL - IS - 86 SE - Articles DO - UR - https://fri-journal.com/index.php/journal/article/view/110 SP - 77-86 AB - The results of studies of the effect of bacterial preparations Rhizoactive based on the strain of nodule bacteria Bradyrhizobium japonicum M-8 and Phosphoenterin based on the strain of phosphorus-mobilizing bacteria Enterobacter nimipressuralis 32–3 and foliar nutrition with water-soluble fertilizers of OMEX trademark in combination with potassium humate in the phase of the 3rd trifacial leaf and full flowering on the productivity of soybean-rhizobial symbiosis under availability of the background soybean rhizobia populations in the soil. The amount of biologically fixed nitrogen (120– 126,5 kg/ha) and the seed yield of soybean varieties of different maturity groups (2.69– 2.80 t/ha) depending on the bacterial and mineral nutrition were determined. It has been revealed that bacterization with biological preparations Rhizoactive and Phosphoenterin contributes to the effective nitrogen fixation from the air and, as a consequence, an increase in the level of soybean seed yield. It has been proved that under conditions of the right-bank Forest-Steppe on gray forest medium loamy soils, seed bacterization with biopreparations based on such strains as Bradyrhizobium japonicum and Enterobacter nimipressuralis in combination with foliar nutrition with macro- and microelements improves biological nitrogen fixation of from the atmosphere by 69.0–71.1 kg/ha and increases the level of seed yield by 0.75–0.76 t/ha, even against the background of the soil population of nodule bacteria. A direct relationship and strong positive correlation between the amount of biologically fixed nitrogen and seed yield of soybean varieties have been established. ER -