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Evaluation of storage losses of onion sets depending on the storage temperature

Marcela Krawiec

Department of Seed Production and Nurseries
University of Agriculture in Lublin
Leszczyńskiego 58, 20-068 Lublin, Poland

The purpose of the presented research was to evaluate the storage losses of onion sets in various temperature conditions, depending on the cultivar and onion size. Two temperature ranges were applied: 0-1°C and 18-20°C, which, according to the research of many authors prevent vernalization of onion sets. The experiment was carried out from 1996 to 1999. For storage, two cultivars of onion were selected, i.e. ‘Rawska’ and ‘Błońska’, divided into 4 size classes depending on the diameter of the onion bulbs (5-10, 11-15, 16-20, 21-25 mm). Determined were the extent of the weight losses, the total storage losses caused by complete drying up of sets, sprouting into leaves, and occurrence of disease symptoms (% of the number of onions in the sample). It was found that storage of onion sets in a temperature of 18-21°C had a significant effect on the increase in total storage losses in comparison with storage in a temperature of 0-1°C. These losses were 27.1% and 4.4%, respectively, in relation to the number of onions in the sample. Regardless of the storage temperature, the type of the quality losses depended on the size of the onion sets. The smaller the onion sets stored, the more bulbs completely dried up and the fewer were sprouting into leaves.

Krawiec M., 2002. Evaluation of storage losses of onion sets depending on the storage temperature. Folia Horticulturae 14/1: 13-20.