Abstract:In order to solve the "individualized" demand for fresh-keeping packaging technology for Xinjiang's fresh grapes e-commerce logistics. Effects of modified atmosphere packaging (5% O2+8% CO2) combined with different concentrations of sulfur dioxide (SO2) (100 μL/L, 300 μL/L, 500 μL/L, 800 μL/L) fumigation on the postharvest physiological indicators of Xinjiang red globe grapes were examined. The effect of modified atmosphere fumigation packaging technology on the postharvest quality of red grapes was investigated. The results showed that compared with the control, the modified atmosphere fumigation microporous packaging could preserve better fruit hardness, soluble solids content (TSS), titratable acid (TA) content and vitamin C (Vc) content, slow down the rise of pH, and maintain the postharvest quality of the fruit. The 500 μL/L SO2+5% O2+8% CO2 treatment exhibited a better fresh-keeping effect. After 8 days of storage, the pH value was 4.26, which is lower than the control group; the grape fruit hardness was 10.76 N, the TSS content was 16.67%, the TA content was 0.52%, and the Vc content was 1.18 mg/100 g, which were all higher than those of the control group. These showed that the modified atmosphere fumigation microporous packaging method can effectively extend the organoleptic quality and commerciality of grapes, and slow down the loss of nutrition and flavor of red globe grapes. Therefore, the 500 μL/L SO2+5% O2+8% CO2 controlled atmosphere fumigation microporous packaging technology can provide theoretical and data support for the research on postharvest storage, transportation and preservation technology of fresh table grapes.
