Abstract:In order to explore the synergistic effect of atomization fumigation and modified atmosphere packaging technology in preserving the quality of winter jujube during postharvest storage and transportation, Xinjiang winter jujube was used as the research material, and 2% CaCl2+100 mmol/L SA (salicylic acid) atomization fumigation combined with 8% O2+92% N2 modified atmosphere packaging treatment were applied. Using 8% O2+92% N2 modified atmosphere packaging only (without the atomization fumigation treatment) as the control group, the changes in related physiological indicators were measured. The results showed that 2% CaCl2+100 mmol/L SA atomization fumigation combined with modified atmosphere packaging technology inhibited significantly the decreases in the hardness, titratable acid, protopectin and cellulose content of the winter jujube, and delayed the rise of the decay rate, weight loss rate, cell membrane penetration, soluble solids, soluble pectin, cellulase (Cellulase Cx), pectin methyl esterase (PME) and polygalacturonase (PG). Atomized fumigation combined with modified atmosphere packaging seemed better than the control group. On the 6th day, the hardness was 9.16 N, weight loss rate was 1.54%, decay rate was 2.00%, cell membrane permeability was 43.65%, TSS was 17.20% and TA was 0.81%. The contents of cellulose, protopectin, and soluble pectin were 0.45%, 0.59%, and 0.88%, respectively. The enzyme activities of Cx, PME, and PG were lower by 23.52%, 18.60% and 10.00%, respectively, compared with those of the control group subjected only to 8% O2+92% N2 modified atmosphere packaging, and lower by 40.90%, 22.22% and 30.28% compared to the untreated control group. These results indicate that atomization fumigation combined with modified atmosphere packaging technology can significantly delay the decay of postharvest winter jujube, and can extend the shelf life. Therefore, atomization fumigation combined with modified atmosphere packaging technology as a new treatment method can improve the quality of winter jujube during storage and transportation.
