壳聚糖涂膜对沂州木瓜贮藏品质的影响

Effect of Chitosan Coating on the Quality of Yizhou Papaya during Storage

以沂州木瓜为试材,研究壳聚糖涂膜对木瓜的保鲜作用。在室温条件下采用不同质量分数的壳聚糖溶液对沂州木瓜进行涂膜处理,测定其总糖、VC含量、感官品质、质量损失率、硬度和腐烂率的变化。结果表明:壳聚糖涂膜处理能延缓果实硬度、总糖含量、VC、质量损失率和感官品质的降低,降低果实的腐烂率,1.5%壳聚糖涂膜处理保鲜效果最好,可有效地延长沂州木瓜的保鲜期。

Freshly harvested Yizhou papaya fruits with 80% maturity degree were subjected to coating with chitosan solutions at different concentrations or plain water and subsequent storage at 23-25 ℃ in order to examine the fresh-keeping effect of chitosan coating on papaya. During the storage,changes in total sugar and vitamin C contents,sensory quality,weight loss rate,firmness and decay rate of papaya were measured. Results showed that chitosan coating could delay the reductions in firmness,total sugar and VC contents,weight loss rate and sensory quality,decrease the percentage of rotten fruits,and substantially extend the shelf life of Yizhou papaya fruits,especially at a concentration of 1.5%.