Evaluation of supplementary plant preparation application effect on potato production parameters

The aim of the master's thesis was to evaluate the effects of the application of an auxiliary product on the production parameters of potatoes. For this purpose, a one-year small-plot experiment was established in 2022 at the experimental field in Lukavec. The varieties Ornella, Red Anna, Val Blue, and Westamyl were selected for the experiment. For this experiment, the auxiliary product Energen Fulhum Plus was applied. Energen Fulhum Plus is a modified aqueous solution of substance salts obtained by the original decomposition of technical lignosulfonate. It supports the formation of fine root hairs and, as a result, increases the use of moisture and nutrition. It also supports growth, yield, and material composition. After the harvest of the experimental plots, the yield was determined and then samples were taken for chemical analyses. From the experiment, the tuber yield, average tuber weight, starch content, starch yield, dry matter content, nitrogen content, nitrogen yield, and polyphenol content were evaluated. In the monitored year 2022, the temperature and precipitation during the period March - September were above average and it is evident from the results that all the varieties increased the tuber yield (t/ha), average tuber weight (g), starch content (%), starch yield (t/ha), nitrogen content (%) and nitrogen yield (t/ha) compared to the control after the application of the auxiliary product Energen Fulhum Plus. As for the dry matter content (%) after the application of the auxiliary product, the dry matter content increased in all varieties except the Val Blue variety, which showed a slight decrease in dry matter content. The application of the auxiliary preparation had different results for the total content of polyphenols (mg EGA/g dry matter), it increased in the varieties Westamyl and Val Blue and, on the contrary, decreased in the varieties Ornella and Red Anna