Quality and quantity of shallot (Allium ascalonicum L.) yields affected by different time of autumn planting
Shallot is a lesser known vegetable belonging to the Alliaceae family and less widespread in the world and in Slovenia. Its development is different from that of common onions; it forms several smaller bulbs, which form a cluster. Shallot is most often reproduced vegetatively by planting bulbs in spring but the conditions for spring planting are not always optimal and may result in inferior yield. The experiment was conducted on the experimental field at the Biotechnical Faculty in Ljubljana, from October 2018 to July 2019. Two cultivars of shallot (Red Sun and Golden Gourmet) were included in our experiment. Bulbs were planted on October 22nd, November 5th and November 19th. Red Sun exhibited highest average yields, when planted on November 19th (2692.25 g plot‑1). On this particular treatment this cultivar averagely formed 2.9 bulbs cluster‑1 and was characterized by higher ratio between medium and thick bulbs compared to small bulbs. Contrary, Golden Gourmet cultivar showed optimal bulb formation (5.2 bulbs cluster‑1) and highest yields (1618.5 g plot‑1) for the second treatment (planted on November 5th).The proportion of medium-sized and thick bulbs was also highest for this treatment/planting date compared to other dates. It can be concluded that the number of bulbs formed in the cluster is strongly related to the characteristics of the cultivar, but also strongly depends on the time of autumn planting. For the Golden Gourmet cultivar, which forms a larger number of smaller bulbs in the cluster, the average weight of each bulb is lower, which ultimately contributes to a lower yield per hectare.
Slatnar, A., Lukšič, L., Hudina, M., Veberič, R. and Kacjan Maršić, N. (2021). Quality and quantity of shallot (Allium ascalonicum L.) yields affected by different time of autumn planting. Acta Hortic. 1320, 125-132
yield, quality assessment, planting time, technology production