Study On Treatment Concentration Of 1-MCP In Different Kiwifruit Cultivars

In this study ,the experiment was conducted to test the storage effects on'Hongyang'kiwifruit,'Xuxiang'kiwifruit,'Huayou'kiwifruit and'Jinxiang'kiwifruit after treated with 0.00μL/L(CK),0.25μl/L,0.50μl/L and 0.75μl/L 1-MCP at room temperature for 16h,and the effects were studied both during the cold storage at 2℃and the shelf life at room temperature.Through determining respiration rate, ethylene production rate, fruit firmness, soluble solid content, titratable acid content, weight loss rate and rot rate of kiwifruits, the suitable concentration of 1-MCP for each variety were probed, and the potential of 1-MCP to the fresh-keeping of kiwifruits was discussed.The main results are as follows.(1) Under low temperature storage conditions, 1 - MCP significantly reduce the respiration rate and ethylene production rate , the time of 'Huayou' and 'Jinxiang' s ethylene peak occurrence was delayed. The fruit of softening speed was reduced, but its downward trend was not affected, which still has the obvious rapid softening period and slow softening period. The titration acid content was delayed, and there were no significant differences among the decline of treatment on soluble solid. Meanwhile the fruits'weight loss rate and rot rate were reduced ,and the shelf life was extended by 1-MCP.(2) The experiment showed that the ripening of different kiwifruit cultivars with each concentration of the 1-MCP was not significantly affected,but different concentrations had different effects. Comprehensive evaluation indexes,while the concentration of 0.50μl/L 1- MCP had a better fresh-keeping effect on the storage of'Hongyang'and'Huayou'kiwifruit, 0.25μl/L 1 - MCP had fairly good effects on the storage and fresh-keeping of'Xuxiang'kiwifruit. while 0.75μl/L 1 - MCP had fairly good effects on the storage and fresh-keeping of'Jinxiang'kiwifruit.(3)'Hongyang's fruit softing was not sensitive on different 1 - MCP concentration, but the chilling injury was added by 1μl/L and above speeds high concentrations, and the injury was proportional to the concentration degree.