The effect of selenite on growth and storage of onions
2008
Zegnere, L., Latvia Univ. of Agriculture, Jelgava (Latvia) | Alsina, I., Latvia Univ. of Agriculture, Jelgava (Latvia)
Three year trials were carried out to evaluate the growth, development and storage of onion cultivars 'Stuttgarter Riesen', 'Red Baron' and 'Snow Ball'. The growth experiments were placed at the experimental field and in a greenhouse of Institute of Soil and Plant Sciences Latvia University of Agriculture. During the growth season onions were treated with sodium- or iron selenite, 50 mg mE-2, 100 mg mE-2 or 200 mg mE-2. Controls were without selenite application. The length and weight of onion leaves was determined during plant growth. Fresh and dry weight was registered at harvest. Onion bulbs were stored at different temperatures: +5 deg C, +15 deg C or +25 deg C. The loss of weight during storage was recorded. The results showed that the weight of onions and the weight and length of depend on cultivar's feature. Sodium- or iron selenite had no significant influence on the parameters of the onion leaves. Onions of the cultivar 'Stuttgarter Riesen' had the highest weight, and 'Snow Ball' had the lightest ones. There were significant differences in content of dry matter between cultivars. No significant effect of selenite was observed in onions grown in the greenhouse. A positive correlation was observed between storage temperature and weight loss of the onions bulbs during storage. The onion bulbs quality on storage depended on the cultivar. Onions dressed with small and medium doses of selenite lost less weight in comparison with control.
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