不同气体组分对冬枣采后生理及贮藏效果的影响

采用冬枣作试材,对在(-1.5±0.5)℃,相对湿度为90%～95%下采用普通冷藏和(1)2%～3%O2,0～0.5%CO2;(2)5%～6%O2,0～0.5%CO2;(3)8%～9%O2,0～0.5%CO2条件下贮藏的冬枣进行了比较研究。结果表明,从贮藏的45d始,普通冷藏的枣果呼吸强度显著高于气调贮藏的,但3种气体组分之间的呼吸强度均未达到显著差异水平。贮藏时间在30d前,各处理枣果果肉乙醇含量无显著差异,但普通冷藏冬枣的乙醛含量显著高于3种不同气体成分贮藏的冬枣。贮藏至60d时的乙醛含量和贮藏90d时的乙醇含量,均以2%～3%O2,0～0.5%CO2条件下最高,显著高于其它3个处理,在该气体成分下,冬枣表皮转红速度最慢,但是好果率却最低,而在5%～6%O2﹢0～5%CO2的气调指标下贮藏90d时,好果率达87%。

Effects of different atmosphere components on storage quality and post-harvest physiology of Dongzao Jujube

Experiment was conducted with the fruit of Dongzao jujube cultivar for studying the atmosphere components in-cluding 2% to 3% O2,0 to 0.5% CO2;5% to 6% O2,0 to 0.5% CO2;and 8% to 9% O2,0 to 0.5% CO2 under the temperature of-(1.5± 0.5) ℃ and RH 90% to 95% in CA storage on its storage quality and post-harvest physiology.The results showed that the respiratory intensity of Dongzao jujube fruit stored in common cold storage was significantly higher than that stored in CA storage after the process of the first 45 d.But there was no significant difference among the effects of different gas compo-nents on respiration intensity.During the first month storage,the contents of ethanol had no significant differences,but the aldehyde content of the fruit stored in common cold storage was significantly higher than that of the 3 different gas conditions.Under the condition of 2% to 3% O2,0 to 0.5% CO2,the jujube fruit had maximum contents of ethanol after stored for 90 d and the content of aldehyde was the highest when stored for 60 d,which was significantly higher than the other 3 treatments.The skin color of Dongzao jujube under the 2% to 3% O2,0 to 0.5% CO2 storage conditions turned red most slowly compared with the other 3 treatments,but the fruit firmness rate of the former was the least.The CA storage with 5% to 6% O2 and 0 to 5% CO2 showed the best result and the quality fruit rate reached 87%.