气调贮藏对冬枣品质的影响

Effect of CA Storage on Post-harvest Storage Quality of Dongzao Jujube

研究了冬枣果实在低温(-1～-2℃)条件下,8个不同体积分数的气体成分(15%O2+0%CO2、10%O2+0%CO2、5%O2+0%CO2、2%O2+0%CO2、2%O2+2%CO2、2%O2+4%CO2、2%O2+8%CO2、2%O2+10%CO2)和1个对照(21%O2+0%CO2)处理对冬枣果实呼吸、果肉相对硬度、组织相对电导率、维生素C含量以及贮藏效果的影响。研究结果表明,适当的低O2可降低冬枣果实的呼吸强度、抑制果肉硬度的下降、减慢组织相对电导率的升高、延缓维生素C的降解、维持冬枣果实良好的贮藏品质;而贮藏环境中的CO2则会促进果实呼吸,导致组织相对电导率升高,促进维生素C的降解,加速了冬枣果实的软化,鲜食价值迅速丧失。2%O2+0%CO2的气体条件对冬枣贮藏最为有利。

In order to further explore the effects of controlled atmosphere（CA） on Dongzao jujube fruit quality during storage, the effects of 8 different treatments with gas compositions （15%O2＋0%CO2, 10%O2＋0%CO2, 5% O2＋0%CO2, 2%02＋0%CO2, 2%O2＋2%CO2, 2%O2＋4%CO2, 2%O2＋8%CO2, 2%O2＋10%CO2） and one ck （21%02＋ 0%CO2） on respiratory intensity, relative electrical conductiveity, relative pulp firmness, VC content and storage quality of dongzao jujube fruit were studied under the condition of low temperature （- 1to - 2℃）. The results showed that, appropriate low concentration of 02 could result in the reduction of dongzao jujube＇ s respiratory in- tensity, slow down the increase of pulp＇ s relative electrical conductivity, restrict lowering of relative pulp firm- hess, delay the degradation of VC, and maintain storage quality of fruits. But CO2 could accelerate fruit respira- tion, causing increase of pulp＇s relative electrical conductivity, promoting degradation of VC, accelerating the softening of jujube, and the rapid loss of the value of fresh jujube. The research showed that the CA index of 2% O2＋0%CO2 was the most beneficial to storage of dongzao jujube.