It was established maximum parameters of leaf area were formed by the following hybrids: Oleksandriya, Umans`ky`j ChS 90, Zluka, ICzB 0801, Romul, Kvarta and Sofiya. With the application of mineral fertilizers, we obtained the best values of leaf area per plant.
It the third decade of September to the third decade of October, the best performance of pure photosynthesis productivity were in hybrids: Vesto (0.42-1.19) and Kvarta (0.98-1.08 g/m2 per day). In hybrids Ramzes, Geroj, Bulava, Ol`zhy`ch and IVP ChS 84 the CPF parameters were higher than zero in the absence of fertilizer, for fertilizer N150P150K150 were: Ramzes, BCzChS 57, Geroj, Bulava, Ol`zhy`ch, for fertilizer N300P300K300: BCzChS 57 ta Geroj, however, the rest of the hybrids lost their dry matter during late harvest and photosynthesis during this period could not compensate for the amount of loss.
For formation of maximum productivity of a hog the harvesting periods in the third decade of July and August were the best. Thus, for crop yields, for harvesting in the third decade of July, the best results were in the hybrids Geroj and Sofiya, because the fertilizer variant N150P150K150 formed 71.8 and 88.8 t/ha of crop, and for fertilizer at a dose of N300P300K300 - 74,7 and 92.4 t/ha respectively. But for the harvest in the third decade of August, the best hybrids were Geroj, Sofiya, Romul, Kvarta. For fertilizers at a dose of N150P150K150, they provided 79.4, 100.0, 80.0, and 80.0 t/ha of boar, and for fertilizing at a dose of N300P300K300 - 83.3, 105.0, 84.0 and 84.0 t/ha, respectively.
It was determined that the following hybrids were the best in sugar beet root content for harvesting in the third decade of September: Geroj – 21,4 %, Sofiya – 21,8 %, Ukrayins`ky`j ChS72 – 21,3 %, Romul 21,4 %. But with the harvest in the third decade of October, the maximum level of sugar content in root crops was in hybrids: Sofiya - 22.0% and Umans`ky`j 21.9%. Hybrids such as Bulava, Ol`zhy`ch, Ukrayins`ky`j ChS72, Romul had increased sugar content at 21.5%.
The use of mineral fertilizer with the standard N150P150K150 led to a decrease in the sugar content of the roots by about 1.3-1.5% compared with untested control options. But the introduction of an increased dose of mineral nutrition - N300P300K300 by 2.2-2.5%. This reaction of the plants is caused by the proper level of providing the soil with mineral nutrition.
It has been investigated that the following hybrids were the best in the content of dry matter in the roots of sugar beets for harvesting in the third decade of September: Geroj – 28,4 %, Sofiya – 28,4 %, Umans`ky`j ChS97 – 28,4 %, Romul 28,5 %. And for harvesting in the third decade of October, the maximum solids content in root crops was in hybrids: Geroj – 28,3 %, Ol`zhy`ch – 28,3 %, Vesto – 28,3 %, Romul – 28,7 %, IVP ChS 84 – 28,4 %. The patterns of accumulation of dry matter under the influence of mineral fertilizers were similar to the features of sugar accumulation.
The most optimal period for obtaining the maximum collection of bioethanol from sugar beets was the third decade of October. Thus, 6.7 and 6.6 t/ha of bioethanol were obtained from Sofiya and Romul hybrids and for fertilizer N150P150K150.
The optimal period for obtaining the maximum yield of biogas from sugar beets was the third decade of September and the third decade of October. It was established that the best performance for sugar beet harvesting in September was provided by the Sofiya hybrid for fertilizer N150P150K150 - 20.8 thousand m3/ha and N300P300K300 - 21.0 thousand m3/ha. But for the harvesting of root crops in October, the best hybrid was Kvarta, for fertilizers N150P150K150 - 19.6 thousand m3/ha and N300P300K300 - 19.8 thousand m3/ha.
It was established that the highest hybrid energy efficiency was in the following hybrids during the third decade of September and the third of October and the use of N150P150K150: BCzChS 57 – 10,0-10,2, Geroj – 10,0-10,4, Sofiya – 9,8-10,2, Romul 11,0-10,9, Kvarta – 10,0-10,2.
Key words: sugar beet; fertilizer rate; harvesting time; root crop yield; sugar content; dry matter content.
