光降解袋对砂糖橘保鲜效果的研究

Study on the effect of photodegradable bag on the preservation of‘Shatangju’(Citrus reticulata Blanco)

目的探究新型环保包装光降解袋对砂糖橘的保鲜效果。方法用光降解保鲜袋和聚乙烯(polyethylene,PE)保鲜袋对砂糖橘进行密封包装处理,同时使用带孔PE塑料盒和不密封的PE袋(空白对照)对砂糖橘进行包装处理,然后将所有处理组的砂糖橘贮藏在(5±1)℃冷库中,定期记录砂糖橘的表型,测定砂糖橘的失重率、亮度(L^(*))、色彩饱和度(C^(*))、色度角(h^(o))、可溶性固形物和可滴定酸的含量、固酸比等。结果与空白对照和PE塑料盒处理组对比,光降解袋和PE袋密封处理显著抑制砂糖橘的失重率、色彩饱和度(C^(*))和发病率(P<0.05),同时维持较高的亮度(L^(*))、色度角(h^(o))、可滴定酸含量和果实商品率。与PE保鲜袋密封处理组对比,光降解保鲜袋密封处理组砂糖橘的失重率、色彩饱和度(C^(*))、可溶性固形物和可滴定酸的含量、固酸比等无显著差异(P>0.05),但光降解保鲜袋密封处理组显著抑制砂糖橘的发病率(P<0.05)和保持较高的亮度(L^(*))、色度角(h^(o))和果实商品率。结论新型环保包装光降解保鲜袋可以有效减少砂糖橘的失水萎蔫,延缓品质劣变,可用于替换PE包装保鲜袋。

Objective To explore the fresh-keeping effect of a new type of environmental-friendly packaging photodegradable bag on Shatangju.Methods The Shatangju was sealed packaged by photodegradation fresh-keeping bags and polyethylene(PE)fresh-keeping bags,at the same time,the Shatangju was packaged by perforated PE plastic box and an unsealed PE bag(blank control).Then,all the treatments of Shatangju was stored in refrigeration house at(5±1)℃.The phenotype of Shatangju under different treatments was evaluated regularly.The weight loss rate,luminosity(L^(*)),color saturation(C^(*)),huge(h^(o)),the content of soluble solids and titratable acid,and the ratio of solid to acid were determined.Results Compared with blank control group and PE plastic box treatment group,the weight loss rate,color saturation(C^(*))and incidence of Shatangju were significantly inhibited by photodegradation bag and PE bag sealing treatments(P<0.05).At the same time,fruit under photodegradation bag and PE bag sealing treatments maintained high brightness(L^(*)),chromaticity angle(h^(o)),titratable acid content and fruit commodity rate.The weight loss rate,color saturation(C^(*)),the content of soluble solids and titratable acids,and ratio of solid to acid of Shatangju were not significantly different between the PE plastic bag treatment group and the photodegradable plastic bag sealed treatment group(P>0.05).However,the photodegradable fresh-keeping bag sealed treatment group significantly inhibited the disease incidence of Shatangju(P<0.05)and maintained higher brightness(L^(*)),chromaticity angle(h^(o))and fruit commodity rate.Conclusion The new environmental-friendly packaging photodegradable fresh-keeping bag can effectively reduce the water loss and wilting of Shatangju,delay the quality deterioration,and can be used to replace PE packaging fresh-keeping bags.