Moisture loss characteristics of fresh table grapes packed in different film liners during cold storage

摘要

Moisture loss characteristics of grapes packed in different packaging liner films during cold storages (1.21 ± 0.25 °C) were studied. The moisture loss rate from grapes packed in non-perforated liner films was significantly (P < 0.05) lower compared to the moisture loss rate from grapes packed in perforated liner films (120 × 2 mm and 36 × 4 mm perforated liner films). After 72 d of cold storage, the maximum moisture loss of grapes stems was significantly (P < 0.05) higher (range from 49.24 ± 4.66% for non-perforated liner films to 88.55 ± 0.61 for no packaging treatment) than moisture loss of grapes berries which was less than 10%. Transpiration coefficients of the different stem parts and grape berries stored in a no packaging treatment decreased significantly (P < 0.05) with storage period. The 36 × 4 mm perforated liner film resulted in a significant (P < 0.05) decrease of transpiration coefficients of the intermediate stem; large stem parts and berries. There were no significant differences between the transpiration coefficients of the bunch parts stored in the 120 × 2 mm and non-perforated liner films. The transpiration rates of stem parts were lowest in the non-perforated liner film compared to other packaging treatment, while the transpiration rates of grape berries showed no differences between the different packaging treatments (0.79 ± 0.51 g kg1 d1, for the non-perforated liner film and 1.57 ± 0.58; 1.59 ± 0.75; 1.37 ± 1.00 g kg1 d1, for the no packaging; 120 × 2 mm and 36 × 4 mm perforated liner films respectively).