不同预冷方法、包装方式、规格和贮藏对甜玉米品质的影响  

Effect of Different Precooling,Packagings,Specifications and Storage on Quality of Sweet Corn

作　　者：刘霞[1,2] 刘升[1] 包建强[2] 饶先军[3] 颜丽萍[3] 

机构地区：[1]北京市农林科学院蔬菜研究中心,北京100097 [2]上海海洋大学,上海201306 [3]福建农林大学,福州350002

出　　处：《制冷学报》2011年第5期67-70,共4页Journal of Refrigeration

基　　金：国家高技术研究发展计划(863计划;2008AA100803);国家科技支撑计划(2009BADB91309-6)资助项目~~

摘　　要：试验研究了纸箱、塑料箱包装对甜玉米冷库预冷、压差预冷和大(L)、中(M)、小(S)不同规格的甜玉米对冷库预冷效果的影响。比较了冷库预冷后纸箱、纸箱+PE膜包装的甜玉米在0℃冷库贮藏过程中的品质差别。研究结果表明:纸箱、塑料箱包装的甜玉米压差预冷时间比冷库预冷时间分别缩短了60min、10min,相同预冷方式,塑料箱比纸箱包装的甜玉米失重率低,甜玉米预冷时采用塑料箱包装压差预冷效果较好;大、中、小不同规格的甜玉米达到预冷目标温度0℃的时间分别为150min、140min、130min,预冷速率差异大,不同规格的甜玉米应分别预冷;纸箱、纸箱+PE膜两种不同包装的甜玉米分别贮藏到第8、12天感官评价值都降至商品界限3分,此时甜玉米的可溶性糖、Vc、TSS含量分别下降10%、5%、2%,甜玉米必须在此前进行销售。纸箱、纸箱+PE膜两种不同包装对甜玉米贮藏期间营养品质的影响差异大,甜玉米0℃贮藏期间采用纸箱+PE膜包装效果较好。This experiment studied the effect of cardboard boxes and plastic boxes on cold-room precooling and pressure precooling,as well as the effect of different specifications sweet corns on precooling.The quality of sweet corns between cartons and cartons ＋ PE film after cold-room precooling during 0 degrees Celsius storage is compared.The result showed that sweet corns which packaged by cartons and plastic box using pressure precooling speed 60min and 10min less than the cold-room precooling;useing the same precooling,plastic box showed lower weight loss than the carton box;so it is better using plastic box and pressure precooling.The precooling rate of the small、middle and big sweet corns is respectively 130min、140min、150min,different specifications cucumbers differ greatly,so different pecifications sweet corn should be precooled separately;and sensory evaluation of sweet corns packaged by carton boxes and carton boxes＋PE film after 8 and 12 days storage drops to 3 as well as the sugar content drops of 10%,the Vc content drops of 5% and the TSS content drops of 2%,so sweet corns must be saled before then.Comprehensive considerate the quality changes during storage carton and carton ＋ PE film packaging showed big differences,therefore,sweet corn storage period using cartons ＋ PE film packaging effect is better.

关 键 词：食品包装与储藏 甜玉米 包装 压差预冷 冷库预冷 贮藏 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程] TB657[轻工技术与工程—食品科学与工程]