１９９６ ～１９９７ 年，对生长中客发梨山梨糖醇及其它糖含量进行测定。结果表明，果实中山梨糖醇含量有三个高峰期，即６ 月初、７ 月中旬和９ 月中旬，其中６ 月初含量最高；８ 月初之前果实中的糖以山梨糖醇为主，从８ 月中旬开始到采收前以果糖为主，而且果糖含量的增加与山梨糖醇的转化有关；果实中的葡萄糖和蔗糖含量在生长期间变化不大 1996 to 1997, the growth of passenger-made pear sorbitol and other sugar content were measured. The results showed that sorbitol content in fruit has three peaks, that is, early June, mid July and mid-September, of which the highest content in early June; before the beginning of August the fruit of sugar sorbitol-based, from mid-August Fructose began to be harvested before harvesting, and the increase of fructose content was related to the conversion of sorbitol. The content of glucose and sucrose in fruits did not change much during growth