Providing sugar beet seed farms with high quality seeds is crucial in optimizing sugar beet subcomplex of Ukraine since using high quality sugar beet seed makes this crop highly technological, highly profitable and competitive in the world market.

Even in the most high-performance hybrids the biological potential is not implemented under low-quality seeds. Sugar beet seeds quality is formed not only with the creation of new hybrids and their cultivation, but also under its pre-sowing treatment. During the beet sugar seeds pre-sowing treatment its stimulation, along with cleaning of impurities, calibration, grinding, sorting by the aerodynamic properties and specific weight, encrusting, is conducted to produce the seeds with the best-possible germination.

The experiments were carried out under conditions of Uman experimental breeding station of NAAS and Cherkasy State Agricultural Experimental Station of ESC "Institute of Agriculture" of NAAS in 2011-2013.

The production testing for using the stimulated sowing seeds was conducted in Cherkasy State Agricultural Experimental Station in 2013. We studied Alexandria and Umansky ChS 97 sugar beet plants of triploid hybrids. The sown area in the field experiments – 54 m², accounted one – 20 m², repetition – fivehold (Umanska DSS), threefold (Cherkaska DSHDS); the area in the production experiments was 0.4 hectares, the repetition – twohold.

Germination intensity under sowing Alexandria and Umansky ChS 97 triploid hybrids stimulated seeds, the average for three years on Uman experimental breeding station, were higher as compared with the control both on the 11th day after sowing, and in a phase of full stairs.

It is worth noting that the intensity of the sprouts emergence of Alexandria hybrid in all accounting dates was higher as compared to Umansky ChS 97 hybrid due to higher laboratory seeds germination. There were no significant deviations in the dynamics of sprouting depending on sowing stimulated seeds in different variants. It is found out that stimulating seed with initiation of passing the initial germination phases and its subsequent suspension in Umansky ChS 97 and Alexandria hybrids for all variants provided increasing its field germination as compared with the control.

Research on production checks Cherkasy experimental breeding station confirmed fully the results of field experiments on the effectiveness of using stimulated calibrated seeds for sowing. There has been found out a significant increase in the number of swellings obtained under sowing stimulated seeds as compared to the control where the seeds are not stimulated, especially in the initial stages of its germination. Nearly the same field germination was obtained under sowing unstimulated and stimulated seeds of sugar beet, which was provided with seedlings emergence intensity along with soil and climatic conditions and cultivation methods.

The dynamics of germination and seeds field germination affected the sugar beet plants optimum growth density which is one of the main factors of productivity.

The industrial research completely confirmed the results of the field studies on the efficiency of sowing stimulated calibrated seeds. Sowing stimulated seeds provided a significant increase in roots yield of both hybrids, which amounted to 4.4 t/ha for Alexandria hybrid and 3.3 t/ha for Umansky ChS 97 hybrid (MPR₀₅ stimulation = 3.3 t/ha).

The research has not found a significant increase in sugar content in beet roots depending on the method of seeds treatment. Rage roots sugar content ranged from 16.8 to 17.0 %. Additional products – sugar yield per hectare was obtained due to the significant increase in yield of roots under nearly equal sugar content. Sowing stimulated seeds of both hybrids resulted in increased sugar yield by 0.7-0.6 t/ha.

Key words: sugar beet, seed stimulate, field germination, sugar content, productivity.