PEAVINE PRODUCTIVITY BY MINERAL FERTILIZATION OF DIFFERENT DOSES AND SEED INOCULATION UNDER THE CONDITIONS OF NORTH-EAST FOREST STEPPE OF UKRAINE

The essential source of providing people with highly qualified food protein is cultivation of grain legume crops, particularly peavine. Its value is determined not only by the high protein content, balanced by amino acid content, but by the quality to fix the nitrogen in symbiosis with tuberous bacteria improving soil fertility. The optimization of cultivation conditions by integration of technology elements’ influence (seed inoculation and mineral fertilizers) favours to the highest possible genetic fulfillment of leguminous crops. Hence, the main condition of gaining high yield of crops is the development and introduction of a modern competitive crop cultivation technology. That is why the study of seed inoculation influence by bacterial fertilizers when combined with the application of mineral fertilizers on peavine productivity and quality is of great practical importance. The researches were being conducted during 2014-2016 years in the scientific-production centre of Sumy National Agrarian University. The researches included such variants of experiment: by the bacterial fertilizers without inoculation and with the treatment of seeds by Ryzohumin. The inoculation of seeds was not made on the control. The backgrounds of mineral nutrition were P₆₀K₆₀, N₆₀P₆₀K₆₀. In article research findings as for the influence of mineral fertilizers of different doses (P₆₀K₆₀, N₆₀P₆₀K₆₀) and seed inoculation by Rizogumin on peavine productivity under the conditions of northeast forest steppe of Ukraine are given. It is determined that the use of bacterial fertilizer gave the opportunity to increase grain yield of this crop on 0.61-0.78 ton per ha. It is proved that the most favorable conditions for the formation of peavine productivity were formed by combining the processes of seed inoculation and mineral fertilization in N₆₀P₆₀K₆₀ dose. The high potency of symbiotic mechanism formation and its activity were achieved by combining presowing seed inoculation by Ryzohumin and application of phosphate-potassium fertilizers (P₆₀K₆₀). The highest amount and weight of tubers were 24.2 pieces per plant and 1.01 gram per plant