辐照与水果保鲜膜剂复合处理柑桔的保藏效应

本文阐述了应用低剂量γ辐照与液态水果保鲜膜剂复合处理柑桔的保藏方法。该法具有增进柑桔贮藏效果、降低贮期腐烂损耗、保持和改善桔果品质和外观的作用。小试表明,经辐照+SM_1和辐照+京2B复合处理的温州蜜柑,在常温下贮藏140天的损耗率分别比相应膜剂处理下降12.9和8.0%、比单一辐照处理下降19.3和15.6%。扩大试验结果表明,该法对温州蜜柑和椪柑的长期贮藏均有效。温州蜜柑和椪柑经复合处理后,常温下分别贮藏125和140天的损耗率为20.6和17.9%,比托布津浸果分别下降5.4和7.6%。通过主要营养成分分析测定表明,复合处理对桔果总糖,总酸、维生素C及氨基酸组分均无不良效应。该法操作简便、成本低廉,有希望作为一种柑桔采后保藏技术在商业上应用。

MANDARIN PRESERVATION BY COMBINING-TREATMENT OF IRRADIATION AND FRUIT FRESH-KEEPING LIQUIDS

The combining treatments(CT)of Mandarin by low-dose irradiation and fruit fresh-keeping liquids reduce the rot or lose rate of the fruit,maintain fruit quality and fresh appearence and prolong the storage life.The results of a small scale experiment showed that after 140 days' storage at room temperature,the lose rate of Satsuma mandarin (Citrus unshin) treated with irradiation(60Co,3 krad) + SM,or irradiation(60Co,3 krad) +Jing-2B,was 12.9% and 8.0% lower than that of singly treated with SM1 of Jing-2B,respectively,and was 19.3% and 15.6% lower than that of singly irradiated.The result of a medium scale experiment showed that the combining treatment was also effective on long term preservation of Satsuma mandarin and Ponkan orange(C.poonensis).After 125 days' storage,the lose rate of Satsuma mandarin treated with CT method (60Co,3 krad + Jing-2B ) was 20.6%,which was 5.4% lower than that of treated with Thioponate pesticide.After 140 days' storage,the lose rate of Ponkan orange treated by CT method(60Co,3 krad + Jing-2B ) was 17,9%.which was 7.6% lower than that of treated with Thioponate pesticide.The analyescs of main nutricnsts indicated that CT method didn't exert any obvious influence on total sugar,total acid,vitamin C and amino acid content in the fruit.The method was also cheap and easy to utilize and might be a promising method in mandarin preservation.