To prevent adverse changes of sweet cherries after harvest and extend their shelf life, in this experiment, a sweet cherry variety Meizao was used as the test material, three single and combined factors, namely UV-B(21.6 kJ/m2), UV-C(21.6 kJ/m2) ultraviolet radiation, and 1% of chitosan(CS) coating film, were used to treat sweet cherries, the control was no any treatment, totally 7 treatments were set. And they were stored at 4 ℃ for 28 days to detect the postharvest quality indexes of sweet cherries under different treatments. The results showed that, compared with the control group, the quality of the fruits treated with UV/CS was maintained better. UV/CS treatment could significantly inhibit the decrease in hardness, TAC content and AOX of sweet cherry fruits, as well as the increase in weight loss rate and TSS. Although both types of ultraviolet rays were effective in maintaining fruit quality, compared with UV-B treatment, the accumulation of TP content in sweet cherry fruits treated with UV-C was higher and the related AOX ability was also stronger. In conclusion, the treatment method combining chitosan, ultraviolet light(UV-B and UV-C) and cold storage had the best effect. It could significantly inhibit weight loss and the increase of TSS, and maximize fruit hardness and the contents of AA, AOX, TAC, and TP.
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