Olekshii L. Sugar Beet Productivity as Depending on Application of Growth Regulators and Miсrofertilizers in Right-Bank Forest-Steppe of Ukraine

The object of the research is processes of forming highly productive agrophytocenosis of sugar beet with high technological qualities of roots by applying growth regulators and micronutrient fertilizers. The purpose of the research is to achieve high sugar beet productivity by applying growth regulators and composite micronutrient fertilizers "Reakom" on typical black soil in the condition of right-bank of Forest-Steppe of Ukraine. The investigation results on forming productivity and quality of sugar beet roots as depending on application of chemicals are showed in the dissertation. Research results allowed defining the most effective forms, doses and technique of application of growth regulators and composite micronutrients fertilizers "Reacom" on sugar beet crops, determining complex influence of growth regulators and micronutrients fertilizers on basic physiological processes, growth and development of foliage, intensity of photosynthesis processes, accumulation of dry matter and nutrients in the plants. The most effective growth regulator for sugar beet seeds treatment was defined Biolan in dose 20 mg/t: roots yield - 51,6 t/ha, sugar content - 16,8 %, sugar harvest - 8,6 t/ha; foliage treatment - Biolan in dose 10 mg/ha: roots yield - 50,8 t/ha, sugar content - 16,7 %, sugar harvest - 8,5 t/ha. Applying Biostimulin on sugar beet crops decreased sugar harvest in comparing with Biolan on 0,2-0,3 t/ha. The highest productivity of sugar beet was got under composed application of growth regulator Biolan and micronutrients fertilizers Reacom-sugatr beet on OEDF + ultramicronutrients. When treating seeds with Biolan, 20 ml/t and further foliar application of composition of Biolan, 10 ml/ha and micronutrients fertilizer, 4 l/ha in phase of closing leaves intercrop, the sugar roots yield was 50,7 t/ha, sugar content - 18,2 %, sugar harvest - 9,2 t/ha; the increase to the control without chemical - reciprocally on 6,4 t/ha, 0,6% and 1,4 t/ha.