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1、现代食品科技ModernFoodScienceandTechnology2014,Vol.30,No.3不同预冷方式对荔枝贮藏品质的影响吕盛坪,吕恩利,陆华忠,杨松夏,郭嘉明(南方农业机械与装备关键技术教育部重点实验室,华南农业大学工程学院,广东广州510642)摘要:为掌握荔枝不同预冷方式对贮藏品质影响,以“淮枝”荔枝为材料,分别采用冰水(L1)、冷库(L2)、差压(L3)以及高湿差压预冷(L4)处理,而后进行25d保鲜试验,分析并对比不同预冷方式对荔枝贮藏后质量影响。结果表明:保鲜时间延长,荔枝质量损失率不断提高但均未超过1.5%。从5d至25d,L1、L2所得好果率从99.33%、5
2、3.29%分别降至15.70%、5.29%,L3、L410d后几乎无好果;L1、L2、L3和L4褐变指数分别从1.32、2.42、3.37、3.02升至2.97、3.94、4.18、3.97;同一时期,L1所得好果率和褐变指数明显优于其它方式。前10d,L1所得色差值明显大于其它预冷方式;L3、L4感官评定无显著性差异,但均明显低于L1。各预冷方式可溶性固形物(TSS)含量在16.63至17.93之间且无显著性差异,并表现出先增后降再增趋势;可滴定酸(TA)含量不断减少。基于对比结果,冰水预冷是荔枝较适合预冷方式。本文为荔枝预冷方式选择提供参考。关键字:荔枝;预冷;贮藏;品质文章篇号:16
3、73-9078(2014)3-157-162EffectofDifferentPrecoolingMethodsontheStorageQualityofLitchiLVSheng-ping,LVEn-li,LVHua-zhong,YANGSong-xia,GUOJia-ming(KeyLaboratoryofKeyTechnologyonAgriculturalMachineandEquipment,MinistryofEducation,CollegeofEngineering,SouthChinaAgriculturalUniversity,Guangzhou510642,China
4、)Abstract:InordertoobtaintheeffectsofdifferentprecoolingmethodsonthestoragequalityofLitchi,continuous25daysfreshkeepingexperimentfor“Huaizhi”precooledbyiceprecooling(L1),roomprecooling(L2),forced-airprecooling(L3)andforced-airprecoolingwithhighhumidity(L4)wascarriedout.Theanalysisandcomparisonofdi
5、fferentprecoolingmethodsonthequalityofLitchiwereconducted.TheresultsshowedthatthemasslossrateofLitchipretreatedbythefourmethodsincreasedwithtimetillnotmorethan1.5%.Fromthefifthdaytothetwentyfifthday,thegoodfruitratesofL1andL2decreasedfrom99.33%and53.29%to15.70%and5.29%,respectively,butL3andL4almos
6、thadnogoodfruitsafter10days.ThebrowningindexesofL1,L2,L3andL4increasedfrom1.32,2.42,3.37and3.02to2.97,3.94,4.18and3.97respectively.ThecolordifferenceofL1wassignificantlylargerthanthoseusedotherthreemethodsbefore10days.TherewasnosignificantdifferenceforL3andL4insensoryevaluation,butobviouslowersens
7、oryqualitiesoftheL3andL4thanL1wasfound.Thesolublesolids(TSS)contentforthefourmethodswerewithin16.63and17.93,withtendencyofincreasingfirst,thendecreasingbutincreasingagain.Thetitratableacid(TA)contentdeclinedwitht