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.
