Abstract:Owing to the e-commerce and logistical needs for fresh grapes, a table grape preservation pad based on sodium metabisulfite and layered silicate was designed and produced, and was used for the postharvest preservation of ‘Cresson’ grapes during storage and transportation. The table grape preservation pads were treated using the following protocols: T1 (0.8 g sodium metabisulfite + 0.2 g sustained release agent), T2 (0.8 g sodium metabisulfite + 0.5 g layered silicate + 0.2 g sustained release agent), T3 (0.8 g sodium metabisulfite+1.0 g layered silicate + 0.2 g sustained release agent), and T4 (0.8 g sodium metabisulfite + 2.0 g layered silicate + 0.2 g sustained release agent). The effects of the table grape preservation pads on post-harvest storage quality of Cressen grapes were analyzed under shelf life conditions of 12~14 ℃. The results showed that the T3 and T4 treatments can significantly decrease ethylene content in the storage environment; effectively maintain fruit hardness, soluble solid content, titratable acid content, ascorbic acid content; have higher sensory evaluation scores; and significantly inhibit grape respiration intensity, shattering, rotting, and stem browning compared with other treatment groups. This indicates that T3 and T4 had significant preservation effects on Cressen grapes during their shelf life and can effectively maintain Cressen grape shelf life quality. Thus, T3 (0.8 g sodium metabisulfite + 1.0 g layered silicate + 0.2 g sustained release agent) can be used as a new grape preservation method in actual production.
