该研究旨在与商业气调（O2=2.25%且CO2<0.10%）比较，探究动态气调（O2=0.90%~1.25%且CO2=0.06%~0.17%）对“Bartlett”梨贮藏中实时乙烯数量以及两次出库包装后（2019年12月3日和2020年1月21日）在20 ℃贮藏1和5 d各气调库中不同果园梨果实品质和生理病害发生的影响。通过实时乙烯数量与褐斑病发病率之间的关系，预测动态气调处理的果实最适出库包装时间。与商业气调库中（CA 23）6个果园果实相比，动态气调库（CA 24）中6个果园果实在贮藏过程中乙烯数量减少了42.12%，在20 ℃贮藏1和5 d后能显著抑制果皮叶绿素降解（p<0.05）以及贮藏5 d后褐斑病发生（p<0.05），但对果实乙烯生成率、出库硬度、软化能力、可溶性固形物和可滴定酸降解影响不显著。在第二次出库包装时，CA 23平均褐斑病发病率为30.00%（已达到商业不可接受范围30.00%），但CA 24为17.04%。通过实时乙烯数量与褐斑病发病率之间的线性规律，得出在2020年3月7日CA 24平均褐斑病发病率为30.00%。相比与商业气调，动态气调可延长1个月果实寿命，使其更具商业应用价值。

This study aimed to investigate the effects of dynamic controlled atmosphere (O2=0.90%~1.25% and CO2=0.06%~0.17%) on the real-time ethylene content of 'Bartlett' pears in comparison with commercial controlled atmosphere (CA) (O2=2.25% and CO2<0.10%). The effects of each controlled atmosphere on the fruit quality and physiological disease occurrence for the fruits from different orchards stored at 20 ℃ for 1 day and 5 days after being taken out from the storage chamber for packaging (December 3, 2019 and January 21, 2020). Based on the relationship between the real-time ethylene quantity and the incidence of brown spot disease, the optimal timing for taking the fruit out of the dynamic controlled atmosphere for packaging was predicted. Compared to the pears from 6 orchards in the commercial CA room (CA 23), the ethylene content of the pears from 6 orchards in the dynamic CA room (CA 24) decreased by 42.12% during storage. The dynamic CA treatment significantly inhibited the degradation of peel chlorophyll (p<0.05) after 1 and 5 d of storage at 20 ℃, and the incidence of brown spots after 5 d of storage at 20 ℃ (p<0.05), whilst causing no changes in the ethylene production rate, fruit firmness, softening potential, soluble solids content, and titratable acid. Upon the second out-for-packing, the average incidence of brown spots for the fruits in CA 23 was 30.00% (which reached the commercially unacceptable range, 30.00%), whilst the average incidence of brown spots for the fruits in CA 24 was 17.04%. According to the linear relationship between the real-time ethylene cumulative quantity and the incidence of brown spots, the average incidence of brown spots for the fruits in CA 24 would be 30.00% on March 7, 2020. Compared to the commercial CA treatment, the dynamic CA treatment extends the fruit storage life by 1 month, indicating that the dynamic CA treatment is more valuable for commercial applications.

Washington Tree Fruit Research Commission（PR-17-106）；国家自然科学基金项目（31501539）