雾化熏蒸结合气调包装技术在冬枣采后贮运保鲜中的应用

为探究雾化熏蒸结合气调包装技术对冬枣采后贮运品质的协同保鲜作用，以新疆冬枣为研究试材，采用2% CaCl2+100 mmol/L SA（salicylic acid，SA）雾化熏蒸结合8% O2+92% N2气调包装处理，以8% O2+92% N2气调包装与无处理作为对照组，测定相关生理指标变化。结果表明：2% CaCl2+100 mmol/L SA雾化熏蒸结合气调包装技术明显抑制了冬枣硬度、可滴定酸、原果胶、纤维素含量的下降，延缓了腐烂率、失重率、细胞膜渗透性、可溶性固形物、可溶性果胶、纤维素酶（Cellulase，Cx）、果胶甲酯酶（pectin methyl esterase，PME）、多聚半乳糖醛酸酶（Polygalacturonase，PG）的上升。雾化熏蒸结合气调包装方式较对照组效果更好，在第6 d时，硬度为9.16 N、失重率为1.54%、腐烂率为2.00%、细胞膜渗透性为43.65%、TSS为17.20%、TA为0.81%。纤维素、原果胶、可溶性果胶含量分别为0.45%、0.59%、0.88%，Cx、PME、PG的酶活性比8% O2+92% N2气调包装对照组低了23.52%、18.60%和10.00%，比无处理对照组低了40.90%、22.22%和30.28%，表明雾化熏蒸结合气调包装技术对延缓冬枣采后腐烂有显著的效果，可以延长货架期。因此，雾化熏蒸结合气调包装技术作为一种新型的处理方式可以很好的提升冬枣贮运品质。

Application of Atomization Fumigation Combined with Modified Atmosphere Packaging Technology in Storage, Transportation and Preservation of Winter Jujube

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.