A combined effect of nitrogen and sulphur in the onion nutrition | Společné pusobení dusíku a síry ve výživě cibule kuchyňské
2009
Lošák, T., Mendelova zemědělská a lesnická univ., Brno (Czech Republic) | Hlušek, J. | Kráčmar, S., Univerzita Tomáše Bati ve Zlíně (Czech Republic) | Buňka, F. | Kováčik, P., Slovenská poľnohospodárska univ. v Nitre (Slovak Republic)
Two-year vegetation pot experiment with onion (Allium cepa, L.) was carried out in 2004 and 2007. The yield of onion bulbs was stimulated by 8.4-21.2% in the conditions of the constant level of nitrogen (0.6 g per pot) and increased level of sulphur (40 and 60 ppm, resp. 30 and 60 ppm S) in comparison with natural (low) sulphur content in soil. There were no significant differences between two S-doses. Increasing levels of sulphur reduced the concentration of undesirable nitrates in bulbs by 6.6-33.1% in comparison with sulphur non-fertilised control treatment. The application of sulphur did not influence the concentration of both sulphur amino acids cysteine and methionine. It is highly recommendable to use nitrogen-sulphur mineral fertilizers in onion growing.
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