模具对毛竹主秆造型的影响

Effect of Mold on Shape of Culm of Phyllostachys edulis

为探索在不同透光和透气条件下,毛竹Phyllostachys edulis笋在模具内的生长规律,2019年4月10日,以厚度为0.12 cm、0.15 cm、0.18 cm,高度200 cm的不锈钢方形模具为试材,采用四周不同大小洞孔的模具进行套笋,2019年7月20—21日拆模,调查经过造型竹和CK(自然生长)的200 cm主秆中每节的平均节间长和平均竹节数量,并对毛竹竹笋成竹过程中主秆形状和竹节生长及胸径变化等指标进行分析对比。结果表明:不同钢板厚度对竹笋生长后的节间长、竹节个数、主秆高和胸径大小的影响差异不显著,但钢板厚度应在0.12 cm以上;节间长和竹秆高均随着模具孔隙的增大而增大,两者呈明显的正相关关系;竹节数量随着模具孔隙增大而减少,两者呈明显的负相关关系;胸径在各处理之间差异不显著。为此,在毛竹材造型过程中应选择厚度>0.12 cm的钢板制作模具,再根据需要,通过模具孔隙的调整,选择不同竹笋粗度和模具的大小、长度培育规格不同的毛竹竹材。

On 10 April 2019,shoots of Phyllostachys edulis were treated with stainless steel square mold of 200 cm high and with different diameter round holes,with steel plate thickness of 0.12 cm,0.15 cm and 0.18 cm.On July 20-21,molds were removed,and determinations were implemented on average internode length,numbers of node of bamboo shoot in the molds and CK(no mold).Analysis was made on differences of shape,node and DBH growth.The results showed that plate thickness had no great influence on internode length,number of nodes,culm height and DBH,but the experiment resulted that the plate thickness should be more than 0.12 cm.Internode length and culm height had positive relation with size of round holes at mold,while numbers of node had obvious negative correlation.There was no significant difference in DBH among different treatments.