己醛处理对脐橙果实贮藏品质的影响

研究不同剂量己醛熏蒸处理对采后脐橙果实贮藏品质的影响。脐橙果实用0（对照）、50、100、150 μL/L的己醛熏蒸处理24 h后，于5 ℃、85%～90% 相对湿度条件下贮藏60 d，并定期进行指标测定和感观分析。结果显示，50、100 μL/L己醛处理对脐橙果实的贮藏品质无显著影响；150 μL/L己醛处理会对果实造成毒害，表现为果皮褐变和果肉汁囊枯水、粒化；同时，150 μL/L己醛处理果实的还原型VC含量也显著低于其他处理。说明适宜剂量的己醛熏蒸处理能够控制脐橙果实侵染性病害的同时不影响果实的贮藏品质，过高剂量的己醛处理会造成果实的生理性病害。

Effect of Hexanal Treatment on Storage Quality of Navel Orange

Previous studies have shown that treatment with 100 μL/L hexanal could significantly inhibit infectious diseases
of citrus fruit. This study was designed to investigate the effects of different concentrations of hexanal on the postharvest
quality of navel orange. After being exposed to 0, 50, 100 or 150 μL/L hexanal vapor for 24 h, the fruit were stored at 5 ℃
and 85%–90% relative humidity for 60 days. Sensory attributes and other indicators were evaluated during storage period.
Results showed that 50 and 100 μL/L hexanal treatments did not have obvious effects on storage quality of navel orange
fruit. However, 150 μL/L hexanal treatment caused poisoning in fruit with symptoms of reddish-brown peel as well as
dryness and granulation of pulp. Besides, the ascorbate content of the fruit treated with 150 μL/L hexanal was significantly
lower than that of other treatments. To conclude, appropriate concentration of hexanal could maintain the quality while high
concentration of hexanal could cause physiological disorder of navel orange fruit.