臭氧气体处理对甜瓜和雪花梨果实贮藏品质及效果的影响

【目的】观察臭氧气体处理后甜瓜和雪花梨果实的贮藏品质变化,减少贮藏损失。【方法】以甜瓜和雪花梨为试材,经不同质量浓度臭氧气体处理后于4℃贮藏,定期分析果实品质变化。【结果】与对照相比,臭氧气体处理后甜瓜腐烂率降低50%,抗坏血酸含量下降10%、可滴定酸减少16%;有效维持雪花梨的硬度,延缓可溶性固形物变化,叶绿素含量下降47%;提高了两种果实可溶性蛋白质的含量,抑制丙二醛含量的上升。不同质量浓度的臭氧气体处理对甜瓜和雪花梨的腐烂率和品质的影响有所不同。甜瓜贮藏28d后,20mg/m3臭氧气体显著降低腐烂率,60mg/m3和100mg/m3次之;雪花梨贮藏40d后,100mg/m3臭氧处理的品质显著好于对照,而200mg/m3臭氧与对照的变化趋势相近。【结论】适当质量浓度的臭氧气体处理对甜瓜和雪花梨有一定的保鲜效果。

Effects of ozone treatment on quality of stored melon and Chinese pears

Objective]To improve the quality of stored melon and Chinese pear fruits with ozone.Methods] Taking melons and Chinese pears as materials,investigating the effects of different ozone treatments on quality changes of the fruits during storage at 4℃.Results]Compared with controls,ozone treatment could effectively reduce the decay of melon and Chinese pear fruits,delay the decrease of contents of ascorbic acid,soluble solid,titratable acid and cholorophyll of the fruits by 50％,10 ％,16％,and 47％,respectively,increase the soluble protein content and inhibit the increase of malondiadehyde content.There was a different show at ozone concentrations on quality of melon and Chinese pears.The 20 mg/m3ozone gave a minimum decay at 28 d of storage,followed by 60mg/m3 and 100mg/m3.The qualities of Chinese pears with 100mg/m3 ozone treatments were significantly better than control during 40 d of storage,and the changes of fruits with 200mg/m3 ozone and control group were similar.Conclusion].A suitable concentration of ozone treatment might be benefit for storage of melon and Chinese pear.