Effect of sulphur fertilization on contents of phenolic and sulphuric compounds in onion (Allium cepa L.)

Effect of sulphur fertilization on contents of phenolic and sulphuric compounds in onion (Allium cepa L.)

This study evaluated the effects of different levels of sulphur fertilization on the quality of onions (cultivars Bingo, Boston, Red Matte, Karmen, White Solid and Diamant). The study was conducted as a field experiment. Sulphur was added at doses of 0, 30.00, 40.00 and 50.00 kg·ha-1, respectively....

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Bibliographic Details
Published in:Journal of food and nutrition research 2018-01, Vol.57 (2), p.170
Main Authors: Tóth, Tomáš, Bystrická, Judita, Tomáš, Ján, Siekel, Peter, Kovarovič, Ján, Lenková, Marianna
Format: Article
Language:eng
Subjects:
Allium cepa
Antioxidants
Cultivars
Fertilization
Onions
Phenolic compounds
Phenols
Polyphenols
Qualitative analysis
Quercetin
Statistical analysis
Sulfur
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Summary:This study evaluated the effects of different levels of sulphur fertilization on the quality of onions (cultivars Bingo, Boston, Red Matte, Karmen, White Solid and Diamant). The study was conducted as a field experiment. Sulphur was added at doses of 0, 30.00, 40.00 and 50.00 kg·ha-1, respectively. Contents of total sulphur, total polyphenols and quercetin together with their antioxidant activity were determined, as well as possible correlations between the qualitative parameters. Sulphur fertilization increased (P < 0.05) the sulphur, quercetin and total polyphenols contents and the value of antioxidant activity in onion. Statistically significant highest contents of polyphenols as well as quercetin were recorded in red cultivars at a sulphur dose of 40.00 kg·ha-1. The highest contents of polyphenols were recorded in yellow cultivars at a sulphur dose of 50.00 kg·ha-1. White cultivars contained the lowest content of polyphenols as well as of quercetin, but the highest values were recorded at the sulphur dose of 40.00 kg·ha-1. The highest values of antioxidant activity were achieved in all cultivars at the sulphur dose of 40.00 kg·ha-1, except for cultivars Boston and Diamant.
ISSN:1336-8672
1338-4260