太白红杉分枝格局的可塑性研究

Study on Branching Pattern Plasticity of Larix chinensis

研究了不同竞争类型和地形因子对太白红杉分枝格局的影响.结果发现: 1 处于不同竞争地位的太白红杉分枝格局有较大差异,主要是分枝率、枝长和枝间距变化明显; 2 太白红杉南、北方向的分枝格局有明显差异,主要是分枝率、枝长和末级枝的分枝角度的差异;而东、西方向上无明显差异; 3 由于受到地形的影响,太白红杉个体中存在明显的侧枝上转现象.研究结果表明:处于不同竞争地位的太白红杉植株在分枝格局上表现出明显的差异,太白红杉不同方位的分枝也具有较大的差异,说明太白红杉植冠构型具有较强的形态可塑性和适应性.

In this paper,the effect of different competition types and different geomorphological factors were investigated.The results are as follows:(1)There is a great architectural variation of Larix chinensis in different competition types,bifurcation ratios,branch length and interval between branch change significantly.(2) Between one trees northern and southern branching pattern,there is a significant difference between tip branches,such as bifurcation ratios,branch length and angle.While there is no significant difference between one trees west and east branching pattern.(3) Branch reorientation demonstrates directly the trees architecture modulation.We conclude that in different competition types there is significant branching pattern difference.And in the different direction parts in L.chinensis,the difference is obviously too.These results show that the branching pattern plasticity and adaptability of L.chinensis is very obvious.