Mikheyev V. Crop productivity of soybean varieties depending upon the growth regulators, desiccation and senication of sowings in the conditions of the Left-Bank Ukrainian Forest-Steppe

The subject of research - the processes of growth and development of soya plants, productivity and variety quality formation of different groups of ripeness. The aim of research - the optimization of seed treatment with rhizohumin and plant growth regulators, revealing an influence of desiccation and senication of crops on productivity and length of vegetative season of new soya variaties. The methods are field, laboratory, measuring and weight, mathematical and statistical. The value and novelty of the research - the effectiveness of soybean seed treatment with rhizohumin and new plant growth regulators is established. The influence of desiccation and senication of crops on length of vegetative season, seed yield and its qualitative indices formation of such soya varieties as Romantyka, Ustya, Annushka is determined. The soybean variety growing technology components are improved what promotes the acceleration of seed ripening by 2-14 days, the increase in productivity up to 2.0 ton/ha with the proteincontent up to 38.3 per cent. The main results of the research have passed a production trail and are applied of the farms of Kharkiv region over an area at 72 ha. The field of application - the agricultural production.