不同地形条件对毛竹株数和竹壁材积的影响

Influence of Site Conditions upon the Shoot Number and Bamboo Timber Volume of Phyllostachys pubescens

以浙江天目山国家级自然保护区内的近自然毛竹林为对象,基于DEM在群落尺度上分析不同地形条件对毛竹株数和竹壁材积的影响,对单一地形因子分析结果表明:在近自然毛竹林中,毛竹株数随坡度增加有增加的趋势;毛竹株数相对于竹壁材积,对坡向较为敏感;毛竹株数和竹壁材积受地表起伏变化的影响不明显。对组合地形因子分析结果表明:坡向、坡度和粗糙度的不同组合,均会对毛竹的生长和发育产生不同的影响。

Taking the close-to-nature Phyllostachys serve in Zhejiang Province as the object, the influence pubescens stand in Tianmu Mountain National Nature Reof different site conditions upon the shoot number and the bamboo timber volume at community level was studied based on the Digital Elevation Model （DEM） technique. The single terrain factor analysis showed that the shoot number of P. pubescens tended to increase along with the in- crement of slope gradient in the close-to-nature stand. The change of shoot number was more sensitive than the change of bamboo wall volume to the slope aspect. There was no significant difference between the change of shoot number, the change of bamboo wall volume and the change in terrain relief. Based on the compound terrain factor analysis, the combinations of slope aspect, the slope gradient, the roughness of the terrain surface had varied influ- ence on the growth and development of P. pubescens.