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Termín a způsob aplikace klasické a inhibované močoviny ve výživě kukuřice
Miloš, Lukáš
The aim of this bachelor thesis was to examine the effect of mineral fertilizers application on the grain yield of corn. The 4-year field experiment was conducted in years 2019-2022 in the form of small plot field experiment at the Field experimental station Žabčice. The primary objective of the experiment was to compare the method and term of application, as experimental fertilizers were chosen classic urea and its fully inhibited variant, thus urea with nitrification (IN) and urease (IU) inhibitor. The following treatments were included in the experiment: 1. Urea + IN + IU to the depot (autumn), 2. Urea to the depot (autumn), 3. Urea + IN + IU to the depot (spring), 4. Urea to the depot (spring), 5. Urea + IN + IU wide (spring), 6. Urea wide (spring).The work also focuses on average comparison of term (autumn, spring) and method of application (to the depot, wide), regardless of investigated fertilizer as well as to the average yield of grain after the application of the examined fertilizers (urea, urea + IN + IU). The average four-year results showed a difference of 4.3 % in grain yield after the application of urea fertilizer (8.38 t/ha), regardless of the term and method of application, compared to its inhibited variant (8.03 t/ha). The application of the examined fertilizers in autumn resulted in an increase in average grain yield by 5.8% compared to application in spring. The last factor investigated was the method of application, with maize fertilised widely yielding 10.3% higher compared to depot fertilisation.
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