应用臭氧浓度精准控制熏蒸装置提高树莓贮藏品质  

Application of ozone concentration precise control fumigation device improving quality of raspberries during cold storage

作　　者：张娜[1] 李昆仑[1] 王文生[1] 阎瑞香[1] 

机构地区：[1]国家农产品保鲜工程技术研究中心(天津),天津市农产品采后生理与贮藏保鲜重点实验室,天津300384

出　　处：《农业工程学报》2017年第10期295-301,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：天津市科技计划项目(15YFNZNC00080);公益性行业(农业)科研专项(201303075)

摘　　要：为了明确不同浓度臭氧气体处理对树莓低温贮藏品质的影响,促进臭氧精准控制装置在果蔬采后贮藏保鲜中的应用,采用国家农产品保鲜工程技术研究中心(天津)研制的精准浓度臭氧冷藏熏蒸装置对树莓(品种:海尔特兹Heritage)进行短时臭氧熏蒸处理(4℃,1 h,相对湿度95%),臭氧质量浓度为0.21、0.54、1.07 mg/L,熏蒸后树莓置于0℃冷库中贮藏,定期测试不同浓度臭氧熏蒸处理对树莓采后贮藏品质的影响。结果表明:臭氧精准控制装置能够在较短时间内达到设定浓度,0.21、0.54、1.07 mg/L的臭氧分别在96、168、240 s时达到,并且臭氧浓度控制精准,精度为0.05 mg/L。不同浓度臭氧熏蒸处理均可以显著抑制树莓微生物繁殖(P<0.05),1.07 mg/L可使树莓微生物菌落总数降低1.62个数量级。0.21、0.54 mg/L熏蒸处理过的树莓感官品质显著好于对照组(P<0.05),能够有效延缓树莓果实维生素C降解,维持可滴定酸、可溶性固形物含量,抑制硬度下降,0.54 mg/L熏蒸处理对树莓的保鲜效果较佳,1.07 mg/L熏蒸处理对树莓表面造成轻微伤害,反而促进树莓贮藏中的腐烂,降低了营养品质,不利于树莓保鲜。精准控制臭氧浓度,对于明确臭氧处理保鲜效果、调控树莓采后贮藏品质方面具有应用潜力。In order to define the effect of precise control of ozone treatment on the quality of raspberries during cold storage, and promote the application of ozone precision control device in the fruits and vegetables postharvest fresh-keeping, the fresh raspberry （variety： Heritage） was processed with short-term fumigation （4 ℃, 1 h, relative humidity of 95%） using the precise ozone refrigerated fumigation device, which was developed by National Engineering and Technology Research Center for Preservation of Agricultural Products. The ozone concentration was set as 0.21, 0.54 and 1.07 mg/L, and the fumigated raspberries were placed in cold store （0 ℃）. The ozone fumigation device was tested, and the effects of different concentrations of ozone fumigation treatment on raspberry postharvest storage quality were analyzed. Results showed that using a two-wire ozone transducer installed inside refrigerated cabinet, and through the ozone sensor, the device turned the ozone concentration of refrigerated cabinet into current output to the intelligent measurement and control device, which was then compared with the parameters set on intelligent measurement and control instrument. Thus by relay signal to control the switch of ozone generator, the precise control of ozone concentration was realized. The device could set the concentration in a relatively short time, and accurately control the ozone concentration. The ozone concentrations of 0.21, 0.54 and 1.07 mg/L were respectively acquired after 96, 168, and 240 s since they were set, and the device control precision was 0.05 mg/L. The ozone fumigation treatment could inhibit significantly microorganism of raspberries to flourish （P〈0.05）, and the total number of colony in raspberries could be reduced by 1.62 orders of magnitude with 1.07 mg/L treatment. The greater the ozone concentration, the smaller the number of colonies, and the ozone concentration and microbial quantity had concentration- response relationship. The color, flavor, hardness, and rotting

关 键 词：臭氧 贮藏 品质控制 树莓 熏蒸 

分 类 号：S229.3[农业科学—农业机械化工程] S663.2[农业科学—农业工程]