...竹林密度；丛立竹数；丛冠幅；年龄结构 [gap=6102]key words: dendrocalamopsis oldhami；high-yield structure；density of bamboo forest；individual numbers of a clump； width ofclump crown； age structure ..
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主要是竹林密度过大，林内通风透光不良所致。
The main cause is that density of bamboo forests is too big and ventilation and light is not so good.
并根据新竹产量与竹林密度和林分年龄组成的非线性相关关系，建立了新竹产量的预测模型。
The model of calculating new culm yield has also been established depending on the nonlinear relationship between new culm yield and bamboo stand density, culm age component.
另一方面，1～3年生毛竹竹壁密度的增加，对毛竹林生物量的增加也有一定的影响。
Furthermore, the increase of culm-wall density for 1~3 year bamboos has also the influence over the increase of biomass of bamboo groves.
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