ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Low oxygen storage of 'Ginger Gold' apples.

Barden, C. L.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 16 Pages: 183-188 Ref: 2 ref.

1997

บทคัดย่อ

Ginger Gold is a high quality early apple cultivar harvested in early to mid-August in south central Pennsylvania, USA. Fruits have a green to yellow, smooth skin, cream coloured flesh, and a mild flavour. Fruits were harvested from 5-year-old trees on M.26 on 25 August 1995 and on 14, 21 and 28 August 1996. The 1995-harvested fruits were stored in air at 0 deg C or in controlled atmosphere (CA) storage (3% O2 + <2% CO2 or 0.7% O2 + 1% CO2) for 4 or 7 months, and the 1996-harvested fruits were stored in air at 0 deg or in CA storage (0.7% O2 + 1% CO2, 1.0% O2 + 1% CO2 or 1.5% O2 + 1% CO2) for 5 or 8 months. In air storage, fruit firmness and quality, based on measurements of total soluble solids (TSS), titratable acidity (TA) and disorders and defects, declined rapidly after 2 months. In CA storage, however, firmness and quality were maintained for several months. The SS content at harvest varied greatly between the 2 years of study (12.6 in 1995 and 9.0-9.5 in 1996) and hence the eating quality

 at harvest and also after storage varied greatly. However, parameters such as firmness and TA were similar in both years. The best results were obtained in low-oxygen storage (0.7% O2 + 1% CO2). In both seasons, firmness remained at 72 N with no low-oxygen injury in this storage regime. There were no significant differences in percentage decay between the CA regimes (decay incidence was <5% in all samples). After 8 months' storage, fruits from all CA regimes had approx. 2% cracking and breakdown. Fruits harvested on 14 August 1996 had approx. 8% scald after 8 months' storage, compared with no scald in the later harvested fruits. Storage atmosphere had no significant effect on scald incidence although there was a tendency to less scald with lower O2.