INFLUENCE OF WEATHER CONDITIONS, VARIETY AND SEA ALGAE-BASED BIOPREPARATIONS ON ROOT YIELD, SUGAR CONTENT AND POLARIZED SUGAR YIELD OF SUGAR BEET

The field polyfactor experiment with sugar beet was performed in the years 2014-2016 at SUA research station in Nitra, Dolna Malanta. The experiment monitored the influence of weather conditions, genotype of varieties and biopreparations on root yield, sugar content and polarized sugar yield of sugar beet. The weather conditions had highly significant influence on all three monitored parameters. The highest values of root yield, sugar content and polarized sugar yield were detected in 2016. The variety had significant influence on root yield, highly significant influence on sugar content but no influence on polarized sugar yield was observed. Among the investigated varieties the highest values of sugar content and polarized sugar yield were observed in the Galvani variety; the Kosmas variety reached the highest root yield in average. Sea algae-based biopreparations had significant influence on root yield. After application of Alga 600 biopreparation, the highest root yield and polarized sugar yield were recorded. Application of biopreparations did not influence the sugar content values.