ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Controlled atmosphere storage shows potential for maintaining postharvest quality of fresh lychee fruits.

Thelakkat Vilasachandran; Sargent, S. A.; Maul, F.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 17 Pages: 83-89 Ref: 9 ref.

1997

บทคัดย่อ

Defect-free, detached litchi, cv. Mauritius, fruits (25 plus or minus 0.3 g) were placed in 1.765-litre glass jars (n=17 plus or minus 1 fruits/jar) where controlled atmosphere (CA) was applied utilizing a flow-through, humidified system at 5 deg C. The CA treatments consisted of combinations of 3% or 4% O2 with 5%, 10% or 15% CO2. Fruits stored in air were used as controls. Fruit quality was assessed at regular intervals over 22 days of CA storage plus one day storage in air to simulate retail conditions. Weight loss was lowest (1.27%) for fruits stored in 3% O2/5% CO2 (3/5). Fruits held in 3/5, 4/5 and 4/10 were darker in colour than those in the other treatments (lower L* value); there were no effects of treatments on hue angle and chroma values. Significant reductions in soluble solids content (SSC) were found in all treatments when compared with initial SSC, except for 3/10 and 3/15. Control fruits had the lowest titratable acidity, whereas 4/15 had the highest (0.40% and 0.62%, respectivel

y). Total sugars were also significantly lower for all treatments when compared with initial values. Fruits from CA treatments showed negligible incidence of black spot (Colletotrichum spp.) and a lower incidence of stem-end decay [unspecified] than control fruits. Sensory quality tests showed that fruits from 3/5 and 4/5 treatments were rated higher in flavour and texture than fruits from the other treatments; treatments involving 3/15 and 4/15 were rated lowest due to off-flavours.