采收期对京白梨果实货架期品质的影响

以京白梨为试材，分3个采收期（盛花后130、137和144d，采期Ⅰ、Ⅱ、Ⅲ），对果实货架期生理生化指标进行了研究。结果表明：京白梨属于呼吸跃变型果实，不同采收期之间，果实单果重、乙烯释放量、果肉硬度、可溶性固形物（SSC）、pH值、种子颜色指数、果皮颜色差异明显，可作为京白梨适宜采收成熟度的参考指标。同时发现，随着采期的延后，果实乙烯峰值启动时间缩短，硬度和pH值下降加快。果实采收越晚，货架期果实SSC越高，L值越高。

Effects of Harvest Date on Fruit Quality of Jingbai Pears during Shelf-life Period

This paper studied integrated quality of Jingbai pears for three harvest dates which were picked at 130,137 and 144d after full bloom（DAFBⅠ—Ⅲ). Results are indicated: Jingbai pears is a kind of typical respiration climacteric fruit. There was significant difference for weight per fruit , ethylene production, flesh firmness, soluble solids contents, pH, coloration index of seed, pericarp color between different harvest dates. These can be the major technological index as the optimum harvest maturity of Jingbai pears. During shelf-life period, the later the harvest date, the shorter start-up time it took to the fruits of ethylene peak. Meanwhile, the later the harvest date, the higher solids contents and L value.