中文摘要：

对西藏拉萨露地栽培的早熟品种的油桃果实的生长发育进行了动态观测,结果表明：3个油桃品种中油5号、曙光和9-37果实的纵径发育特征为“S”曲线;而果实横径的“S”形不明显,呈较为平缓的直线发育规律;果形指数随着生长发育期表现下降的趋势,此3个油桃品种的果实均呈长圆形。

英文摘要：

The article is focused on the fruit development of the early ripe nectarine varieties which production in open in Lhasa. The result shows that the change of longitudinal diameter of ＂zhongyou 5＂, ＂shuguang＂ and ＂9--37＂ are ＂S＂ curve during the growing period. The transverse diameter shows a relatively smooth linear growth rule. Fruit shape index is gradual decline during the growing period, and all fruit appearance characters are long round.