A classical latitude clinal variation pattern was found for seedling growth of long-leaf type provenances.Compared with the northern provenances, the southern ones had higher seedling growth rate.

• 相关分析发现，较之于北部的长叶类型三尖杉种源，来自于南部的长叶类型种源苗高生长量较大，地径有增大的趋势；