辐照灭菌对红薯干品质和贮藏特性的影响  

Effects of Irradiation Sterilization on Quality and Storage Characteristics of Dried Sweet Potato

作　　者：王炳奎[1] 张猛超 刘超纲[1] 吴列洪[1] 杨文新[1] 陈金跃[1] 沈升法[1] 陆艳婷[1] WANG Bingkui;ZHANG Mengchao;LIU Chaogang;WU Liehong;YANG Wenxin;CHEN Jinyue;SHEN Shengfa;LU Yanting(Institute of Crop and Nuclear Technology Utilization,Zhejiang Academy of Agricultural Sciences,Hangzhou,Zhejiang 310021)

机构地区：[1]浙江省农业科学院作物与核技术利用研究所,浙江杭州310021

出　　处：《核农学报》2023年第3期513-521,共9页Journal of Nuclear Agricultural Sciences

基　　金：浙江省农业新品种品种选育重大科技专项(2021C02064)。

摘　　要：为了获得标准化的红薯干辐照灭菌工艺,本试验以γ射线与电子束为不同辐射源,就不同辐照剂量和剂量率对红薯干主要成分、外观品质和贮藏特性的影响开展研究。结果表明,经γ射线≥4 kGy剂量辐照,36℃恒温培养10 d或常温贮存90 d两种方式处理的红薯干;经γ射线≥6 kGy剂量辐照,36℃恒温培养30 d或常温贮存360 d两种方式处理的红薯干,均未检测出微生物。γ射线辐照处理后,红薯干的可溶性固形物、类胡萝卜素含量和感官指标均未发生显著变化。相同剂量下,剂量率越高对红薯干的外观影响越大。电子束剂量率高,辐照处理后的红薯干外观呈黄白色,发生了显著变化。红薯干货架期90 d的辐照灭菌最低有效剂量为4 kGy。本研究结果为红薯干辐照加工工艺的制定提供了依据。In order to obtain standardized irradiation sterilization processes for dried sweet potato,the effects of different irradiation sources ofγray and electronic beam,irradiation doses and dose rates on the main components,appearance quality and storage characteristics of dried sweet potato were investigated.The results showed that no microorganisms were detected in the dried sweet potato after irradiated withγ-ray dose≥4 kGy and subsequently incubated at 36°C for 10 d or stored at room temperature for 90 d.The same result was observed in the dried sweet potato irradiated withγ-ray dose≥6 kGy and incubated at 36℃for 30 d at constant temperature or stored at room temperature for 360 d.No significant changes in soluble solids,carotenoid contents,and sensory indexes were observed in dried sweet potato after treatments withγ-ray irradiation.The higher the dose rate at the same dose,the greater the influence on the appearance of dried sweet potato.Due to the high dose rate of electron beam,the appearance of dried sweet potato changed significantly after irradiation.Thus,the minimum effective dose was recommended to be 4 kGy for irradiating dried sweet potato with a shelf life of 90 d.The results would provide basis for the establishment of irradiation sterilization process for dried sweet potato.

关 键 词：红薯干 辐照灭菌 最低有效剂量 贮藏特性 

分 类 号：TS215[轻工技术与工程—粮食、油脂及植物蛋白工程]