针对柑橘采后贮藏期间存在品质下降及腐坏的问题，该研究以晚熟柑橘为试验材料探讨不同臭氧处理时间对其采后贮藏保鲜效果。结果表明，持续25 d每日固定浓度不同时间的臭氧处理对晚熟柑橘品质有显著影响：臭氧每日处理1 min能显著降低柑橘失重率，贮藏25 d仅为CK组的59.90%；每日处理10 min可较好维持柑橘可溶性固形物（TSS）含量，贮藏结束时为9.20%；臭氧处理可延缓柑橘Vc含量的下降，显著抑制多酚氧化酶（PPO）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性，降低柑橘果皮表面微生物数量，但臭氧处理时间对柑橘硬度、可滴定酸（TA）含量、固酸比没有显著影响；每日处理1、10、20和40 min可抑制柑橘丙二醛（MDA）含量的增加，提升过氧化物酶（POD）活性，每日处理40 min还可显著提升柑橘总多酚含量（TPC）和总黄酮含量（TFC）；主成分分析臭氧每日处理10和40 min柑橘综合品质较佳，从经济性和安全性方面考虑，臭氧每日处理10 min可作为晚熟柑橘采后贮藏期间的适宜保鲜手段。

The late-maturing citrus was used as experimental material to explore the effect of different ozone treatment durations on citrus postharvest storage in an effort to counter the problem of quality decline and fruit decay during the postharvest storage of citrus. The results showed that treatment with fixed ozone concentrations every day (for different durations) for 25 days had a significant impact on the quality of late-maturing citrus. Ozone treatment for 1 min per day could significantly reduce the weight-loss rate of citrus, which was only 59.90% of that of the CK group after storage for 25 days. The contents of total soluble solids (TSS) in citrus were effectively maintained after daily treatment for 10 min; the TSS content was 9.20% at the end of storage. Ozone treatment could delay the decrease in the Vc content of citrus; it significantly inhibited the activities of polyphenol oxidase (PPO), superoxide dismutase (SOD) and catalase (CAT), and reduced the number of microorganisms present on the surface of citrus peel. However, the duration of ozone treatment did not have any significant effect on citrus hardness, titratable acid (TA) content, and solid acid ratio. Treatment for 1, 10, 20, and 40 min daily could inhibit the increase in the malondialdehyde (MDA) content and enhance the activity of peroxidase (POD) in citrus. Treatment for 40 min daily also significantly increased the total polyphenol content (TPC) and total flavonoid content (TFC) of citrus. Principal components analysis showed that the comprehensive quality of citrus treated with ozone for 10 and 40 min daily was better. From the perspective of economy and safety, daily ozone treatment for 10 min could be used as a suitable method for preserving late-maturing citrus fruits during post-harvest storage.

四川省科技创新苗子工程培育项目（2022111）；四川省财政自主创新专项（2022ZZCX060）；四川省十四五育种攻关（2021YFYZ0023-14）；成都市技术创新研发项目（2021-YF05-02120-SN）