GROWTH CHARACTERISTICS OF SUGAR BEET PLANTS WHEN APPLYING DIFFERENT POLYFUNCTIONAL PLANT GROWTH REGULATORS
The article represents the research on effect of foliar treatment of plants with different types of multifunctional growth regulators on the formation of photosynthetic activity indicators and productivity of a sugar beet. We found that 10 days after the first foliar treatment with micronutrients, the leaf area increased by 4.57-5.80 ths. m<sup>2</sup>/ha, compared to 3.72 ths. m<sup>2</sup>/ha on the control. The same trend in the increase of the leaf area and the formation of photosynthetic potential remained throughout the vegetation season. The highest content of chlorophyll was seen after the reapplication of POLYDON Amino Zinc - it counted 67.01 IU; and the lowest - 61,67 IU on the control. A greatest mass of root crops was obtained on the variant with the treatment by POLYDON Boron - 796 g. It is 57 g more than when using POLYDON Amino Zinc, and 66 g - POLYDON Amino Boron-Molybdenum. The foliar treatment with multifunctional growth regulators resulted in yield increases of 3.1-11.0 %. The highest sugar content was observed with the foliar treatment by POLYDON Amino Boron-Molybdenum - 16.47 %. The most productive variant in terms of white sugar yield is the triple treatment with POLYDON Boron - 11.67 t/ha.