The influence of application of growth regulators on the energy balance of sugar beet cultivation was observed in the yield stationary experiments accomplished in 1996 to 1998 on the Fluvi-Eutric Gleysols. The problems were followed at the variety Ibis on the followed variants of growth regulators application: 1. seed incrusted by Elorisan, 2. seed incrusted by Elorisan and foliar application of Elorisan, 3. foliar application of Elorisan, 4. the control without application of Elorisan. According to the results obtained the annual variability of additional energy inputs was observed whose values varied between 35.571 and 40.859 GJ.ha(-1). The reasons for the annual variability were different dosages of applied industrial fertilizers and of the human work used. The most significant part of additional energy inputs were represented by fertilizers (43.85-47.60%) of which the rate of industrial fertilizers varied from 25.26 to 29.35% and the rate of dung was from 18.13 to 20.83%. The second largest part of the total input of additional energy was formed by the fossil energy (22.27-24.28%). The negligible portion was represented by energy under form of growth regulators. Average outputs of energy in the dry matter of roots varied from 204.87 to 261.30 GJ.ha(-1) and in the dry matter of total biomass of sugar beet was the scale of 288.79 to 342.96 GJ.ha(-1). On the variants with the growth regulators application the statistically significant higher yield roots were gained over from 2.26 to 5.77 t.ha(-1) and of beet tops over from 0.42 to 1.42 t.ha(-1) in comparison to untreated control and that is why also higher increase of energy in production was observed. Having comparable inputs of additional energy the higher energy profit was observed in the variants treated by Elorisan while the highest profit values of roots energy (204.78 GJ.ha(-1)) and of the total biomass energy (291.33 GJ.ha(-1)) were found in the variant with the combined application of Elorisan. The annual variability was marked also in the determined values of energy coefficients. The highest values of energy coefficients for roots and the total biomass were reached in 1997 where the lowest inputs of additional energy were used. Growth regulators application caused the average increase of the values of energy coefficients of roots over from 0.26 to 0.45 and of the total biomass of sugar beet over from 0.26 to 0.47 in comparison to the control untreated by Elorisan.
