تأثير مواعيد الإدخال المختلفة إلى وحدة التخزين المبرد على بعض معايير الجودة لثمار الكرز صنف (Black Hardy Giant)‎ في ظروف محافظة السويداء

Abstract EN

The present research was conducted to study the interval entrance times of sweet cherry fruits Prunus avium cv Black Hardy Giant cultivar to the cold storage unit, to determine the effect of suitable entrance time on the quality and the storability of cherries.

Fruits were collected from the field of the Agricultural Scientific Research Center in Sweida at 1550 m altitude, then packaged into 60 μ polyethylene packs and admitted to the cold storage unit at different times ( 0, 4, 8, 12 hours) post harvesting and stored at 0 ± 1º C with 90-95 % humidity for two months.

Some physical indicators ( weight lose, firmness) and chemical characters ( total soluble solids, titratable acidity, content of vitamin C) were tested during the storage period every 15 days.

The present investigation indicated, after 60 days of storage, that the first treatment (0 h) had significantly the highest concentration of vitamin C (56.5mg/100ml) in comparison with 4 h and 8 h treatments, while there was no significant differences with 12 h treatment.

The 4 h treatment showed significant differences with 8 h and 12 h treatments in the TA content(0.703 %) , while there was no significant variance with 0 h treatment.

Concerning total soluble solids (TSS) the two treatments 0 h and 4h significantly revealed high concentrations ( 25,37 and 25,57%, respectively) in comparison with 8 h and 12 h treatments.

On the other hand, there was no significant variation between treatments concerning fruit firmness.

The 12 h treatment revealed the highest percentage of weight lose (3.9%) which was in significant with all other treatments.

Consequently, the rapid admission of cherry fruits at 0hr as well as 4hr into the cold storage unit post harvesting is highly recommended.