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Využití kombinovaného hnojiva ve výživě řepky ozimé
Dundálek, Ladislav
The diploma thesis aimed to evaluate the effect of regeneratively applied combined fertilizer in the nutrition of oilseed rape. The experiment was established at two localities (Žabčice and Vatín) in the form of a small-plot field experiment carried out in the economic years 2020/2021 and 2021/2022. The following treatments were included in the experiment: unfertilized, control, FertiTOP 44 NPS, and FertiTOP 44 NPS in lower dose. The total dose of nitrogen applied in treatment FertiTOP NPS 44 (lower dose) was 130 kg/ha. Control treatment and FertiTop NPS 44 in full dose were based on the total dose of 168 kg/ha of N. In addition to nitrogen, sulfur was also applied as part of regenerative fertilization in control treatment. The following parameters were examined: yield, oil content, oil production, and economic evaluation. A statistically significant difference between the examined treatments was found for the yield and oil production parameters. Overall, the FertiTOP 44 NPS (full dose) treatment was evaluated as the most optimal option with the highest average yield of 3.81 t/ha recorded in the Vatín location. At the Žabčice location, this variant provided an average yield of 3.20 t/ha. This variant was evaluated for the second highest oil content in the Vatín locality (45.3%), but in the Žabčice locality, this variant provided lower oil content (40.7%). In terms of oil production, the FertiTOP 44 NPS (full dose) treatment showed the highest oil production at both locations. The application of FertiTOP 44 NPS resulted in the average oil production 1.72 t/ha in Vatín and 1.31 t/ha in Žabčice. The economic evaluation showed that application of FertiTOP 44 NPS resulted in increase of profit by 21.21% compared to the control treatment in the economic year 2020/2021. Similar result was observed in second year (2021/2022), but the increase in profit compared to the control variant was only 4.11%.
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