Effect of Controlled Atmosphere Storage on Postharvest Preservation of Xuxiang Kiwifruit

In order to investigate the effects of different controlled atmosphere storage conditions on the postharvest preservation of kiwifruit,the Xuxiang kiwifruit were stored under the 4 different controlled atmosphere(2% O₂+3% CO₂,2% O₂+5% CO₂,5% O₂+3% CO₂,5% O₂+5% CO₂)with the temperature 0℃. The fruit hardness,soluble protein contents,vitamin C contents,total phenol contents,malonaldehyde(MDA)contents,peroxidase(POD)activity and polyphenol oxidase(PPO)activity were detected to evaluate the preservation effect. As the results,controlled atmosphere storage effectively maintained fruit hardness,delayed the decline of soluble solids,vitamin C and total phenol contents,inhibited the increasing of MDA content and PPO activity,maintained the higher level of POD activity,which effectively prolonged the storage period of kiwifruit. In summary,2% O₂+5% CO₂ had the best fresh-keeping effect,which could maintain the quality of the kiwifruit,increasing the contents of antioxidants,and delay the aging rate of fruit.