冬枣减压和臭氧联用保鲜技术研究

Study on fresh-keeping technology of hypobaric and ozone of Dong jujube

以冬枣为材料，研究减压、臭氧对冬枣贮藏期生理生化指标的影响。结果表明，减压和臭氧均能降低冬枣呼吸强度，抑制淀粉酶活性，减缓淀粉降解速度，抑制霉菌孢子繁殖，防止果实腐烂，保持果实硬度。减压还可减缓冷害，使贮藏温度较常压下（-1～0℃）降低2℃。正交试验结果表明，采用盛水加湿法，-2℃和40．5kPa条件下，每隔20d用300mg／m^2O3处理30min，可使冬枣贮藏140d，好果率达92．4％。

Using Dong Jujube as materials in the experiment,the effects of hypobarie,ozone on physiological and biochemical changes of Dong Jujube during the storage were studied. The results showed that hypobaric and ozone could reduce respiratory intensity,inhibit amylase activities,slow down the degradation rate of starch,resist the reproduction of mold spores,prevent the rot of fruit and keep the firmness of fruit. Hypobaric storage could also slacken the cold harm of fruit and drop the storage temperature by 2 ℃. Through the orthogonal experiment,under the condition of plenty of water,Dong jujube was stored at -2 ℃ and 40. 5 kPa and dealt with ozone 300 mg/m^3 for 30 minutes every 20 days. The rate of fine fruits was up to 92.4% after 140 days＇ storage.