不同MAP包装内气体变化情况及其对山楂果实品质的影响

Changes of Gas in Different MAP and Effect of the Changes on Quality of Hawthorn Fruit

为延长山楂果实的保鲜期,提高果实贮藏品质,筛选适宜山楂果实长期低温贮藏的塑料薄膜包装。本研究采用4种不同薄膜包装(MAP),对‘大金星’山楂果实进行冷藏(0±0.5)℃试验,研究了不同MAP处理中O2、CO2和乙烯气体体积分数的变化趋势,以及山楂果实生理和贮藏品质的变化。结果表明:在低温(0±0.5)℃条件下,厚度为30μm的PVC薄膜包装有利于减缓山楂果肉硬度和可滴定酸含量的下降,但加速了贮藏后期果实中MDA含量和果肉褐变率的上升;而厚度为15μm的高渗出CO2保鲜袋,对抑制果实硬度下降和减缓果实可滴定酸降解效果不显著,但对减缓MDA含量和果肉褐变率的上升有积极作用。4种不同薄膜包装(MAP)处理中,厚度为15μm的高渗出CO2保鲜袋贮藏效果最佳,适宜山楂果实长期保鲜。

In order to prolong fresh-keeping period of hawthorn fruits, improve storage quality of the fruits, andscreen MAP film package suitable for long-period low-temperature storage of hawthorn fruits, the study took‘Dajinxing＇hawthorn as materials and carried out the refrigeration test with four different MAP film packages（PE perforated bag with 20μm thickness, PVC bag with 30μm thickness, PVC bag with 50μm thickness, andfresh-keeping bag effectively penetrating CO2 with 15μm thickness）. Changing tendencies of volume fractionof O2, CO2, and ethylene, changes of fruit physiology and storage quality of hawthorn in different MAPtreatments were researched during refrigeration（0±0.5℃）. The results showed that under the condition of（0±0.5）℃, PVC bag with 30 μm thickness was beneficial to lessen fruit hardness and titratable acid content.However, in the late period of storage, it promoted rise of MDA content and browning rate. Comparatively,fresh-keeping bag effectively penetrating CO2 with 15μm thickness had insignificant effect on restriction ofhardness decline and retard of titratable acid decomposition, but possessed active effect on lessening the rise ofMDA content and browning rate. Among four different MAP film packages, fresh-keeping bag effectivelypenetrating CO2 with 15μm thickness had the best storage effect and was suitable for long-period fresh-keepingof hawthornfruits.