The aim of the research is to investigate technological process of growing of promising soya cultivars in dry steppe zone of Volga region under irrigation. The urgency of the development of technological process of soybean seed growing is caused by the interest in soya as a crop with high content of protein and oil and which has demand on the domestic market of agricultural products. Experiment observations were done in accordance with standard techniques of experimental work and schedule of study. The experiment investigations were carried out through all elements of technological process. High productive soya cultivars of different selections were chosen which can provide high yield at irrigation lands of dry steppe zone of Volga region: Bara – 3.12 t/ha, Soyer 4 – 3.58 t/ha, Samer 1 – 2.83 t/ha, Samer 3 – 2.54 t/ha, Arleta – 3.10 t/ha, L-009-0077 – 3.90 t/ha. The optimal biological preparation (“Rizobakt”) comprising effective strains of nitrogen fixing bacteria and providing fixation of atmosphere nitrogen up to 60–80 kg/ha was chosen. The irrigation events of soya were differentiated. The optimal irrigation regime by the scheme 70–80–70 % was accepted for use. Biometrics of all soya cultivars was done during vegetation. As a result of three-year study on technological elements of soybean growing under irrigation it was revealed and recommended for production soya cultivars. The optimal plant density of 0.6 million plants per hectare at space row 0.3 m was established. The impact of seed treatment before sowing by biological preparation “Rizobakt” was established. The values of irrigation water use coefficient from 1.53 to 2.56 kg/m³ at irrigation regime 70–80–70 % from field capacity in soil layer 0.6 m were obtained.
Keywords: amelioration, technological process, soya, cultivar, irrigation, productivity, biological yield.
