薄膜气调包装对枇杷果实冷藏期间呼吸和品质性状的影响

    Effects of modified atmosphere packaging on respiration and quality attributes of loquat fruit during cold storage

    • 摘要: 通过对呼吸速率、总可溶性固形物、可滴定酸、pH值、果肉硬度、维生素C、失重率和品质及感官指标的变化进行分析,研究了薄膜气调包装对枇杷(Eriobotrya japonica Lindl.,品种:解放钟)果实冷藏期间呼吸和品质特性的影响,气调包装用的薄膜为低密度聚乙烯薄膜(LDPE,厚度20 μm),以打孔的低密度聚乙烯薄膜包装为对照。结果表明,低密度聚乙烯薄膜包装枇杷果实后,3~4 d后可维持一个相对稳定的适宜枇杷贮藏的O2和CO2的气体浓度,即CO2(4.8±0.67)%,O2(11.5±0.85)%;薄膜气调包装结合低温可明显地降低枇杷果实的呼吸速率;薄膜气调包装可以最大限度地减小冷藏期间的枇杷果实的失重率、果肉硬度、维生素C、总可溶性固形物、可滴定酸和固酸比的变化,维持枇杷的新鲜品质,延长货架期。因此,低密度聚乙烯薄膜(LDPE,厚度20 μm)气调包装可用于枇杷的贮藏保鲜。

       

      Abstract: The influence of modified atmosphere packaging (MAP) on the sensory and quality attributes in loquats (Eriobotrya japonica Lindl.) cv. Jiefangzhong stored at 2~4℃ was investigated in order to prolong shelf life in this study. The plastic film was used: perforated low density polyethylene (Control) and low density polyethylene. The modified atmosphere reached the steady state was (4.8±0.67)% CO2 and (11.5±0.85)% O2. Changes in respiratory rate, total soluble solids (TSS), titratable acidity (TA), pH value, flesh firmness, vitamin C, weight loss and quality were recorded periodically for comparing the effects of the applied conditions. It is showed that the combination of a MAP and low temperature significantly reduced the respiratory rate of loquat. The quality attributes of MAP fruit were good, and MAP induced minimum differences in weight loss, firmness, vitamin C, TSS, TA and TSS/TA ratio during storage compared with control fruit, and also maintained the sensory quality at harvest of loquats at the end of storage and shelf life period. Therefore, it is feasible that MAP with a low density polyethylene (LDPE) film (thickness 20 μm) should be recommended for storing loquats.

       

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