目的 通过对比采前和采后1-甲基环丙烯(1-Methylcyclopropene，1-MCP)处理对“阳光玫瑰”葡萄货架品质的影响，得到较优的1-MCP处理方式。方法 将“阳光玫瑰”葡萄分别进行1 μL/L1-MCP采前喷施和采后熏蒸处理，处理后进行6 d常温货架期实验，以感官评分、质量损失率、固酸比、维生素C(VC)含量、呼吸强度、乙烯释放速率、硬度和香气成分为评价指标，通过主成分分析法分析得到1-MCP的最佳处理方式。结果 1-MCP处理后的葡萄感官评分较对照(CK)组高10分以上，Vc、可溶性固形物、可滴定酸等营养物质流失速度较慢，呼吸强度和乙烯释放速率较低，硬度较高，且在货架期6 d时CK组、采前1-MCP组、采后1-MCP组酯类香气成分的相对含量分别为0.09%，8.25%，39.39%，差异显著。经主成分分析法分析后得到3组葡萄得分排名为采后1-MCP处理组＞采前1-MCP处理组＞CK组。结论 1-MCP处理可有效维持“阳光玫瑰”葡萄的货架品质，且采后1-MCP处理组果实的货架品质优于采前处理组，说明在“阳光玫瑰”葡萄货架期保鲜中1-MCP宜于采后处理。

By the comparison between the effects of preharvest and postharvest 1-MCP treatments on the shelf quality of Sunshine Muscat grapes, a better 1-MCP treatment method was obtained. The Sunshine Muscat grapes were treated with 1 μL/L 1-MCP preharvest spraying and postharvest fumigation treatments, and then subjected to 6-day room temperature shelf experiment after treatment. Weight loss rate, solid-to-acid ratio, Vitamin C(Vc) content, respiratory intensity, ethylene release rate, hardness and aroma components are evaluation indicators to obtain the best treatment method of 1-MCP through principal component analysis. The results showed that the sensory score of grapes treated with 1-MCP was over ten points higher than that of the CK group. In addition, after grapes were treated with 1-MCP, the loss of nutrients such as water and VC was slower, the respiratory intensity and ethylene release rate were lower, and the firmness was higher. And in the late shelf life, the relative content of esters and other beneficial aroma components in grapes differed significantly. The relative content of CK group, preharvest 1-MCP group, and postharvest 1-MCP group were 0.09%, 8.25% and 39.39% on 6th day of shelf life. After principal component analysis, the three groups of grapes were ranked as postharvest 1-MCP group>preharvest 1-MCP group>CK group. In short, 1-MCP treatment can effectively maintain the shelf quality of “Sunshine Muscat” grapes, and the shelf quality of the 1-MCP treatment group after harvest is better than that of the preharvest treatment group, indicating that 1-MCP is suitable for postharvest treatment in the shelf preservation of Sunshine Muscat grapes.