筇竹开花结实特性的研究

研究筇竹开花结实特性的结果表明：（1）开花筇竹林分呈零星斑块状分布，且开花的区域和面积有逐年扩大的趋势；（2）筇竹3月下旬始花，4月初进入盛花期；4月下旬以后种子成熟，无性系分株枯死；（3）开花筇竹的地下茎的颜色由鲜黄色变成红褐色及深褐色，逐渐腐烂死亡；（4）筇竹零星开花的现象是在遵循周期性学说的前提下，由于局部地段反复受到人为干扰，而引起一个或数个无性系内营养不足，提前开花的综合表现。

Studies on the Characteristics of Blossoming and Seed Bearing of Qiongzhuea tumidinoda

The characteristics of blossoming and seed bearing of Qiongzhuea tumidinoda stand were studied in the paper. The results showed that: The distribution of blooming stand was sporadic and spotted,and blooming area was 62~667 m2 per plot. In addition,the area of blossoming stands would be larger and larger year by year. Blooming date started in the last ten days of March, flourishing blooming date began in the early part of April and seed maturating was in the last ten days of April, then the ramet tended to be dead. The rhizomes of blossoming clone changed the color from bright yellow to henna and puce,afterwards it began to rot gradually. The phenomena of sporadic blosso- ming was a synthesis representation of earlier blossoming because one or several clones lacked nutri- tion resulted from locally repeated jamming,but it followed the periodicity theory as a prerequisite.