壳聚糖处理番茄的保鲜效果研究

将变色期番茄果实浸入浓度为1．5％、2．0％、2．5％的壳聚糖溶液中30s，在常温下贮藏；35d，研究壳聚糖对番茄果实的保鲜效果。结果表明，壳聚糖溶液涂膜处理番茄果实，可延迟果实呼吸跃变，降低呼吸强度；缩小可溶性固形物含量变化幅度；延缓果实硬度、VC、总酸度下降速度；减小失重率，推迟果实腐烂时间，降低腐烂率，从而较好地保持番茄果实的贮藏品质。其中以浓度为2．0％的壳聚糖溶液涂膜保鲜效果最好。

Effects of Coating with Chitosan on Freshness of Tomatoes

The deteriorated tomotoes were soaked for 30 seconds with 1.5%,2.0%,2.5% chitosan solutions and stored for up to 33d at regular temperature.The effects of preservation of chitosan on tomtoes were studied.The results showed that different concentration chitosan solutions were used to coat for tomatoes to maintain its freshness.The results showed that the coating with the chitosan could improve the storage quality of tomatoes.The coating treatment could delay climacteric of tomatoes,reduce intensity of breathing,narrow the changing ranges of the soluble solid contents,delay the loss rates of tomato hardness,Vitamin C and total acidity,postpone the rotten time,and reduce the rotten rate.?A good freshness result could be obtained when 2.0% chitosan solution was used.