毛竹主秆人工造型研究

Study on Artificial Molding of Culm for Phyllostachys edulis

在毛竹竹笋长成新竹的过程中,利用正方型的铁制模具套住笋体,强制毛竹主秆形状由圆形变方形。试验结果表明:竹笋高度超出模具5cm以上、竹笋粗度周长等于或略小于模具周长的竹笋,套上模具后竹笋既可成活,毛竹主秆又可形成方型;竹笋粗度周长大于模具周长的,上模后须适时对模具放松竹笋才能成活成型;套模后成活成型的新竹胸围、枝下高、全竹高只有对照的80%、53.8%、56.4%。研究表明在毛竹竹笋长成新竹的过程中,其主秆形状有可塑性,但对新竹的胸围、枝下高、全竹高生长有严重影响,会导致毛竹主秆矮化。

In the process of bamboo shoots growing into bamboo, we used a square iron mould to envelop the bamboo shoots and shape bamboo culms from round to square. The experiment results showed that： the bamboo shoot 5 cm higher than the mould height and with the equal or slightly less circumference than that of the mould could survive, and the culm could be formed square. And if the bamboo shoots had greater circumference than that of the mould, bamboo shoots could survive only on the condition that the mould must be removed at the right time. But the DBH, height under branch and whole height of young bamboo which have survived and been shaped after molding only were 80%, 53.8% and 56.4% of those of the control group, respectively. The study indicated that the Ph. edulis culm could be shaped during the growth, but the artificial molding have serious influences on the growth of young bamboo in terms of DBH, height under branch and the whole height of young bamboo and would dwarf the culm.