通过6年的引种试验,对引进泡泡树品种的物候期及形态特征进行了详细研究.结果表明:引进品种‘Sweet Alice'2年生苗木己见开花,第3年开始挂果,其他品种开始开花和结实时间均晚1年.引进品种花期在3月下旬到4月中旬之间；果实成熟期为7～8月上、中旬,其中‘Taylor’果熟期较早,实生品种果熟期较晚.不同品种6年生果实形态存在一定差异,‘Overleese'和‘Mary Foos Johnson'果实较大,是早期丰产的优良品种.%The phenological phases and morphological characters of introduced pawpaw varieties had been studied in detail for six years. The results showed that the variety 'Sweet Alice' began to flower at the age 2 and bore fruit at the age 3, being one year earlier than other varieties to flower and bear fruit. The introduced varieties' florescence was from late March to mid April and their fruit maturation period was between July and the first 20 days of August. The Taylor variety's fruit maturation period was earlier,while the seedling-plants' was later. There were certain differences in fruit size and yield among the 6-year-old varieties. Both 'Overleese' and 'Mary Foos Johnson' varieties had larger fruit size and weight and were superior ones yielding well at early stage.
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