激光微孔保鲜袋包装对采后荔枝果实的保鲜效应

Effect of laser microporous film packaging on the postharvestpreservation of litchi fruit

为研究激光微孔保鲜袋包装处理对采后常温贮藏荔枝果实的保鲜效果,以“岵山晚荔”品种荔枝为试材,对采后荔枝果实进行普通聚乙烯(polyethylene,PE)薄膜袋(对照组)和激光微孔保鲜袋包装处理,而后置于(25±1)℃、相对湿度85%~90%的恒温箱中,定期测定荔枝果实的品质指标。结果表明,与PE包装相比,激光微孔保鲜袋包装能延缓荔枝果皮褐变指数和果实感病指数的上升,保持较高的商品率,抑制采后荔枝果实呼吸强度、失重率和果皮细胞膜透性的增加,减少可溶性固形物、可滴定酸、可溶性总糖和维生素C等营养物质含量的下降,维持荔枝果实良好的外观色泽。采用激光微孔保鲜袋包装的荔枝果实采后贮藏品质显著优于普通PE薄膜袋包装,研究结果可为荔枝采后常温贮藏保鲜提供便捷的处理方法。

In order to study the preservation effects of laser microporous film(LMF)packaging on postharvest litchi fruit stored at ambient temperature,the“Hushanwanli”litchi fruit was used as the material.The postharvest litchi fruits were packed with polyethylene(PE,control)film and LMF respectively,and then placed in an incubator at(25±1)℃with a relative humidity of 85%-90%.The relevant quality indexes of litchi fruits were measured regularly.Results showed that compared with PE packaging,LMF packaging could delay the increase of pericarp browning index and fruit disease index of litchi fruit,maintain a higher marketable fruit rate,suppress the respiration rate,weight loss,and cell membrane permeability,and keep the higher contents of soluble solids,titratable acid,total soluble sugar,and vitamin C.In addition,LMF packaging could maintain the appearance of litchi fruits.The quality of litchi packaged in LMF was better than that of PE,providing a convenient preservation method for postharvest litchi fruit stored at room temperature.