分别以14棵自然生长在毛竹林中的散生杉木为中心,调查16 m范围内毛竹的胸径以及杉木的胸径、冠幅和杉竹间距。以立地为随机效应,建立毛竹胸径与竹杉间距及杉木胸径关系的线性混合模型;采用O函数结合不同零模型分析杉木对周围毛竹的竞争。结果表明:不论样地是否施肥,杉木显著减少4 m范围内立竹密度,但不影响4 m以外毛竹的分布。竹林内散生杉木对其附近新竹生发具有竞争抑制作用,且不因施肥而缓解。 Fourteen sparsely planted Chinese fir plants, each growing naturally in the bamboo forest, were taken as the center to investigate the DBH, the DBH and the spruce spacing of the bamboo in the range of 16 m. Based on the random effects, the linear mixed model was established for the relationship between the DBH of bamboo and the DBH and the DBH of the Chinese fir. The O function was used to analyze the competition of Chinese fir on the bamboo. The results showed that Chinese fir significantly reduced the stand density within 4 m regardless of the fertilization on the plot, but did not affect the distribution of the bamboo beyond 4 m. Pine wood in the Chinese fir near Hsinchu hair growth has a competitive inhibition, and not due to fertilization and ease.