Iroko
ActiveAllium cepa L. · Onion
Enza Zaden, NL
UA
5 records
Variety traits
Keeping quality — onion
Allium cepa L.
The keeping quality of onions is defined as the marketable yield expressed as a percentage of the initial mass after a storage period. A key indicator of suitability for long-term storage is the dry matter content in the bulb, with an optimal level of 17–22%.
In the reference 147 varieties crop Onion, where this is mentioned in the description.
The evaluation of keeping quality in the variety testing system is conducted on a five-point scale, where high keeping quality corresponds to a marketable yield of more than 90%, and low — less than 75%. The genetic potential of a variety determines the limits of suitability: southern cultivar types usually have a shorter dormancy period compared to varieties specialized for winter storage.
The most important agrotechnical condition for ensuring keeping quality is balanced mineral nutrition. Excess nitrogen in the second half of the growing season prevents the full maturation of the bulb neck, promoting the development of rots, while potassium fertilizers contribute to the formation of dry outer scales.
Technological maturity, necessary for successful storage, occurs at mass lodging of the tops (about 70%). Subsequent high-quality drying of the bulbs is a mandatory step that minimizes the risk of infection with neck and bacterial rots and ensures the preservation of marketable qualities until spring.
General information about the subject — on the page Keeping quality.
Varieties of Onion mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Lorenzos
ActiveAllium cepa L. · Onion
Vilmorin, F
HU
4 records
Samantha
ActiveAllium cepa L. · Onion
ENZA ZADEN
UA
6 records
Elbrus
ActiveAllium cepa L. · Onion
Seminis SVS Holland, NL
UA
4 records
Universo
ActiveAllium cepa L. · Onion
NUNHEMS B.V.
UA
4 records
Exhibition
ActiveAllium cepa L. · Onion
UNWINS SEEDS LTD
HU
LT
UA
5 records
Gladstone
ActiveAllium cepa L. · Onion
Her Bimsdeboer
HU
UA
4 records
Oneida
ActiveAllium cepa L. · Onion
Martin Slot, John Pieter Schipper,
UA
5 records
Alice
ActiveAllium cepa L. · Onion
Petr Klapste
HU
SK
UA
4 records
Cimarron
ActiveAllium cepa L. · Onion
SUNSEEDS
IT
5 records
Sonoma
ActiveAllium cepa L. · Onion
Ger Beemsterboer
UA
4 records
Lisa
ActiveAllium cepa L. · Onion
Cora Seeds, I
DE
HU
4 records
Bursa
ActiveAllium cepa L. · Onion
WIJNKER THAAM
UA
4 records
Mississippi
ActiveAllium cepa L. · Onion
Scott Hendricks
UA
7 records
Monastrell
ActiveAllium cepa L. · Onion
ENZA ZADEN
UA
5 records
Hilton
ActiveAllium cepa L. · Onion
Syngenta Seeds B. V.
HU
LT
SK
4 records
Bayram 1
ActiveAllium cepa L. · Onion
EYLEM BAYRAM
UA
5 records
Stuttgarter Stanfield
ActiveAllium cepa L. · Onion
Ger Beemsterboer
UA
2 records
Karmen
ActiveAllium cepa L. · Onion
HU
SK
UA
6 records
Barletta
ActiveAllium cepa L. · Onion
IT
4 records
Venus
ActiveAllium cepa L. · Onion
ISI Sementi, I
UA
4 records
Olina
ActiveAllium cepa L. · Onion
HORAL JIRI / KLAPSTE PETR
HU
SK
4 records
Densidor
ActiveAllium cepa L. · Onion
PARMA SEED SRL
IT
UA
4 records
Corrado
ActiveAllium cepa L. · Onion
HAZERA SEEDS B.V.
UA
3 records