浙江楠苗期生长节律

Study of growth rhythm of reserved seedlings of Phoebe chekiangensis

以珍稀树种浙江楠Phoebechekiangensis为研究对象,研究了浙江楠留床苗的年生长规律。浙江楠每年3月初开始抽梢生长,11月末停止生长,生长天数约250d。留圃苗年生长呈波折状,阶梯性生长明显,属于全期生长类型。苗木高、径生长均有4次生长高峰。依据浙江楠留圃苗地上部分生长特点,可以将苗木的生长过程划分为3个时期:生长初期、速生期和苗木硬化期。3个时期的持续时间分别为20,180,60d,而速生期的生长量最大,占整个生长量的91 65%。

The growth rhythm of reserved seedlings of Phoebe chekiangensis was studied. The seedlings sprouted in March, stopped growing at the end of November. The growth period was about 250 days. The growth rhythm of reserved seedlings in one year was not even. It belonged to full-time growth type. The seedlings had 4 growth peaks. According to the growth characteristics of the above-ground part of reserved seedlings of Phoebe chekiangnsis, the growth process could be divided into 3 periods: early growth period, fast-growing period and induration period. The duration of 3 periods were 20 days, 180 days and 60 days respectively. And the seedlings grew very fast in the fast-growing period. The growth volume in the period accounted for 97.65% of the total growth volume.