以 １４ 年生高橙砧玉环柚为试材 ，采用石蜡切片 、透 射电镜观察等方法，研究了玉环柚果实特性与裂果的关系⒚结果表明，在果实表面积膨大速率、采后果实 临界爆破压力以及果皮组织结构等方面，易开裂的扁圆 形果和不易开裂的 梨形果有所不同⒚梨 形果各个时期，各个 部位的表面积膨 大速率比 较一致；而扁圆形果 在 ８ 月底时各部位 膨大速率还较一致， 至 ９ 月底及采收期，果 顶部膨大速 率明显大 于其他部位⒚采后果实 临界爆破压力梨形果极显著大于扁圆形果⒚梨形果的果皮组织结构较扁圆形果紧凑⒚ Using 14-year-old orange anvil Yuhuan pomelo as test material, the relationship between the fruit characteristics and fruit cracking of Yuhuan pomelo was studied by means of paraffin section and transmission electron microscopy. The results showed that in fruit surface area expansion rate, critical fruit burst pressure and pericarp Organizational structure and other aspects, easy to crack oblate fruit and pear-shaped fruit is not easy to crack different pear fruit in each period, the various parts of the surface area expansion rate is relatively consistent; and oblate fruit at the end of August when the various parts of the expansion At the end of September and harvesting period, the rate of top swollen fruit was obviously larger than that of other parts. The critical burst pressure of postharvest fruit was significantly larger than that of flat fruit. The fruit structure of pear fruit was more oblate Fruit compact ⒚