高节竹立竹干形、冠形和叶形变化的海拔效应

Influence of Altitude on Culm Form,Crown,Phylliform of Phyllostachys prominens

为探明海拔是否会对高节竹立竹的秆形、冠形和叶形产生明显的影响,对立地条件、经营措施和经营水平基本一致的3个海拔梯度(110±10 m、370±10 m、560±10 m)的高节竹林2年生立竹进行了秆形、冠形和叶形相关指标的调查分析。结果表明:海拔对高节竹立竹的胸径、相对枝下高、相对全高、壁厚率、相对冠长、枝盘数、枝夹角和叶片单叶质量、叶面积、叶周长、叶长及叶面积波动性不对称有较为明显的影响(P<0.05),而对立竹的平均节间长、扁圆率、冠幅、枝分角、枝长、叶宽、叶片长宽比、比叶面积、叶周长波动性不对称影响总体上并不明显(P>0.05)。综合分析认为,海拔对高节竹立竹形态有影响,其中,秆形对海拔的影响最为敏感,其次为叶形,冠形最为迟钝,并且中海拔更有利于立竹秆、叶的生长发育,高海拔更有利于竹冠的生长发育。

In order to study the effect of altitude on the morphological characteristics of Phyllostachys prominens and provide reference for the cultivation of high quality bamboo shoots,culm form,crown,phylliform of 2-a P.prominens from three altitudinal gradients(110±10,370±10 and 560±10 m)were investigated.The results showed that DBH,relative under branch height,relative total height,wall thickness ratio,relative crown length,the number of nodes,angles between the culm and branches,leaf weight,leaf area,leaf perimeter,leaf length,FAW,FAA of P.prominens were markedly influenced by altitudinal gradient(P<0.05).Internode length,oblate ratio,crown breadth,angles between branches,branch length,leaf width,leaf length-width ratio,SLA,FAP of P.prominens showed no significant difference among different altitudes(P>0.05).In conclusion,morphological characteristics of P.prominens was influenced by altitudinal gradients,the culm form was most sensitive to elevation,then phylliform,crown was the least sensitive to elevation,the middle elevation was more conducive to culm form and phylliform growth,and the high altitude was more conducive to crown growth.