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Stabilizovaná hnojiva s dusíkem a sírou ve výživě řepky ozimé
Svědirohová, Monika
This thesis examined the effectsof applied stabilized fertilizers with nitrogen and sulphur content of mineral nitrogen and sulfurin the soil at two experimental sites. Further, the effect of each variant of fertilizers on yield and oil content of winter oilseed rape. The problem was solid by form of small-plot field trial at the experimental sites Žabčice and Vatínin the marketing year 2012/2013. The experiment included the following variants of fertilization: 1. unfertilized, 2. ENSIN 100 % of the dose, 3. ENSIN 80 % of the dose, 4. ENTEC 26 100 % of the dose, 5. ENTEC 26 to 80 % of the dose, 6. DASA+DASA, 7. LAD (ammonium nitrate with dolomite) + ENSIN. Fertilizers ENSIN and ENTEC 26 containing DASA (ammonium nitrate and amonium sulphate) and nitrification inhibitor. For variants 2 and 4 was applied once the total dose of nitrogen (194 kg / ha) and variants 3 and 5 was applied, only 80 % of the dose (155 kg / ha) as a stage tillering fertilization. Variant 6 was fertilised by DASA without a nitrification inhibitor. DASA was applied (78 kg / ha of nitrogen) as a regenerative fertilization, as well as the of fertilization I. (58 kg /ha of nitrogen). For the production of fertilization II. was used fertilizer DAM-390 (150 kg /ha of nitrogen). Seventh variant combines Ammonium nitrate (78 kg / ha of nitrogen) is applied as a restorative fertilization and stabilized fertilizer ENSIN (116 kg / ha of nitrogen), which was applied as fertilizer production I. The experimental area was Žabčice Nmi content and Lead in soil at the beginning of stem elongation highest in the variant fertilized fertilizer ENTEC 26 100 % dose. The seed yield of winter oilseed rape had different variants of fertilization statistically significant effect. Oiliness was statistically lower in the variant ENSIN 100 %, ENTEC 26 % 80 and DASA + DASA. The greatest economic efficiency, option fertilization LAD + ENSIN. This variant 1 crown costs fertilization produces 3.63 crowns in seed yield. The experimental area Vatín the highest content of Nmin in the soil at the beginning of stem elongationon the variant fertilizing ENTEC 26 100 % dose. The seed yield of winter oilseed rape is statistically different only from the other variant fertilized variant, which was applied fertilizer. The oil content of the parameter is statistically different each variant of fertilization. After evaluating various options coefficient of efficiency was the most effective fertilizer ENSIN 80 % of the dose. This variant 1 crown fertilizer cosi creates seed yield 7.39 CZK.
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