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通过对江南油杉(Keteleeria cyclolepis)幼苗叶物候的观测和生长指标的测量分析,结果发现,江南油杉幼苗1年分春梢和秋梢2次发育,苗高和地茎分别在春梢和秋梢期出现2次快速生长期。苗高快速生长期出现在9—11月和3—5月,地茎快速生长期出现在8—10月和2—5月,地茎的2次快速生长期均比苗高快速生长期提前1个月。江南油杉苗期叶物候分为芽初露期、膨大期、初展期、展叶期4个时期,春梢从芽露期到展叶盛期总共经历57d,秋梢比春梢经历时间少3天。
Through the observation of the leaf phenology of Keteleeria cyclolepis seedlings and the measurement of their growth index, the results showed that the seedlings of Keteleeria cyclolepis showed two developmental stages in spring and autumn, Autumn shoots appear 2 times rapid growth period. The rapid growth period of seedling appeared in September-November and March-May, and rapid growth of soil stem appeared in August-October and February-May. Both of the rapid growth of stems and stems were faster than the rapid growth of seedling height 1 month. The phenological changes of the seedlings of A. niloticus were divided into four stages: the initial bud stage, infancy stage, early stage and leaf stage. The spring shoots experienced 57 days in total from bud to leaf stage, 3 days.