均衡自发气调贮藏保鲜莱阳梨

以莱阳梨为试材，研究莱阳梨均衡自发气调贮藏的条件和效果。结果表明， EMAP贮藏能够较好地保持果实的硬度；抑制PPO活性，贮藏120d后，CK组PPO活性为40.9U/g，远高于EMAP组的28.4U/g，两者差异显著(P＜0.05)；延缓POD活性的降低和膜透性的升高，贮藏120d后，EMAP组POD活性为0.25U/g，显著高于CK组的0.04U/g，使用EMAP冷藏的梨果膜透性上升及变化幅度较CK组小，两者的差异极显著(P＜0.01)；减少VC含量的损失，贮藏至30d时， EMAP处理与CK相比梨果的VC含量较高，两者差异极显著(P＜0.01)。研究得到的莱阳梨EMAP贮藏的适宜气体组成为：2.2% CO2和14.0% O2，或者2.6% CO2和12.9% O2，在此条件下，莱阳梨的贮藏期可以达到200d以上。

Fresh-keeping Effect of Equilibrium Modified Atmosphere Packaging on Laiyang Pears

In this paper,the fresh-keeping effect of equilibrium modified atmosphere packaging (EMAP) conditions on quality parameters of Laiyang pears was explored. Results indicated that EMAP storage maintained a good level of fruit firmness,and inhibited the activity of polyphenol oxidase (PPO). After 120 days of the storage,the control group (without any packaging treatment) showed a PPO activity of 40.9 U/g,even higher than 28.4 U/g of the EMAP group,with a significant difference (P < 0.05). EMAP treatment delaye...