硅窗气调包装对黄秋葵采后贮藏品质的影响

Effect of Silicon Window Packaging on Storage Quality of Okra

摘要:

为探讨不同规格硅窗包装袋处理对黄秋葵的保鲜效果，以不同硅窗面积热合PVC包装袋（空白组、6 cm2、8 cm2、10 cm2）处理采后黄秋葵，并对黄秋葵的感官品质（腐烂、锈斑、硬度、色泽）及理化指标（电导率、Vc、L*）进行统计及分析。结果表明：黄秋葵在4 ℃贮藏期间，10 d时达到最大呼吸强度。硅窗气调包装可以有效改善黄秋葵采后贮藏期间的感官品质，处理15 d (80.52%、84.22%、86.34%)与20 d(75.92%、79.36%、78.26%)时，6 cm2与8 cm2、10 cm2处理组有显著性差异（p<0.05），这一结果与CO2浓度、O2浓度、电导率、L*显著性相关（p<0.05），即通过气体浓度有效抑制了组织电导率，提高了L*，从而显著提高了黄秋葵贮藏感官品质。从贮藏效果来看，4 ℃贮藏时，PVC袋（30 cm×40 cm，46 μm）热合8 cm2（0.7 mm厚）即能够最大程度的减少黄秋葵采后腐败率，从而达到延长黄秋葵货架期的目的。

Abstract:

In order to investigate the effect of different sizes of silicon window packaging bags on preservation of okra, post-harvest okra was treated with PVC bags with different sizes of silicon windows (blank group, 6 cm2, 8 cm2, 10 cm2). The sensory quality (decay, rust spot, hardness, color) and physical and chemical indexes (electrical conductivity, Vc, L*) of okra were analyzed. Results showed that the maximum respiratory intensity of okra was found at 10 d at 4 ℃. Modified atmosphere packaging with silicon window can effectively improve the sensory quality of okra during postharvest storage. When treated for 15 days (80.52%, 84.22%, 86.34%) and 20 days (75.92%, 79.36%, 78.26%), there were significant differences between 6 cm2 and 8 cm2, 10 cm2 treatments (p<0.05). These results were significantly correlated with CO2 concentration, O2 concentration, conductivity and L* (p<0.05). The electrical conductivity of tissues was effectively inhibited and L* was increased by gas concentration, which could significantly improve the sensory quality of Okra during storage. From the storage effect, when stored at 4 ℃, PVC bags (30 cm×40 cm, 46 μm) were heated to 8 cm2 (0.7 mm thick) to minimize the spoilage rate of okra after harvest, thus prolonging the shelf life of okra.