Biological nitrogen contribution to the increased forage value of soybean grains in the Non-Chernozem zone of Russia

Abstract The article presents the results of studied effect biological nitrogen fixation on yield, forage value, protein and oil productivity soybean varieties belonging to northern ecotype (Mageva, Okskaya Svetlaya), depending water supply. Under conditions Central Non-Chernozem Region, have been proved provide maximum yield 3.05 t/ha; content – 43.51%; fat 20.67%; 1322 kg/ha; essential amino acids 833 531 in units 4118 kg/ha. In years with excessive optimal supply, pre-sowing seed inoculation an active strain 605b Rhizobium japonicum (Kirchner) significantly increases productivity: by 0.21-0.25 t/ha, seeds 2.11-3.35%, 0.33-0.57%, 125-176 kg/ha, 43-72 84-111 lysine 7-8 kg, unsaturated fatty 29-37 305-348