บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effects of low-oxygen and high-carbon dioxide atmospheres on postharvest quality, storage and decay of 'Walla Walla' sweet onions.

Sitton, J. W.; Fellman, J. K.; Patterson, M. E.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 18 Pages: 20-25 Ref: 12 ref.

1997

บทคัดย่อ

Effects of low-oxygen and high-carbon dioxide atmospheres on postharvest quality, storage and decay of 'Walla Walla' sweet onions.

In 1991-1992, after an initial 4 months' storage in 1% O2-5% CO2, a second series of controlled atmosphere (CA) regimes (20.1%-0.5% O2 or 0.3%-17.8% CO2) was imposed on sound bulbs to extend onion (cv. Walla Walla) storage for an additional 4 months. In 1992-1993, onions were stored in 20.5%-0.7% O2 or 0.1%-16.3% CO2 for 7 months. Onions stored in 0.5% O2 (1991-1992) and 0.7% O2 (1992-1993) were of better quality and had less neck rot caused by Botrytis sp. immediately following CA storage than onions from other treatments. Onion neck rot was significantly reduced in CO2 concentrations >8.9%, while CO2 injury was significant at 4.1% CO2. Onions were removed at intervals from CA storage in 1992-1993 and held in respiration chambers (20 deg , 2 weeks) to monitor respiratory CO2 and C2H4 evolution, and assess shelf-life. CO2 production generally increased during storage, with peak levels in December. Ethylene was not detected from the onions during the first 6 weeks of storage; after this, ethylene

 was detected sporadically in most atmospheres, with the exception of 0.7% O2. After 2 weeks at 20 deg , onions previously stored in 0.7% O2 developed less decay but sprouted more than those from all other atmospheres studied.