不同类型毛竹天然混交林对毛竹出笋和成竹的影响

在不同类型的毛竹天然混交林内设置标准地，调查林分的毛竹自然再生产情况。结果表明：由6~8竹组成的竹杉阔混交林、竹杉混交林和6竹组成的竹松杉阔混交林，林分结构组成较合理，自然再生产能力较强，每公顷出笋数、新成竹数、新竹质量以及每株母竹出笋、成竹数等各项生产指标均大于纯竹林；6~7竹组成的竹松阔混交林、6~8竹组成的竹松杉混交林、6竹和8竹组成的竹松混交林，其林分结构组成较差，自然再生产能力较弱，每公顷出笋数、新成竹数、新竹质量以及每株母竹出笋、成竹数等各项生产指标均不同程度低于纯竹林。

Effects of Natural Mixed Forests of Phyllostachys pubescens of Different Types on Bamboo Shooting and Growth

In the natural mixed bamboo forests of different types, 52 plots of bamboo were set to investigate the natural reproduction of Phyllostachys pubesens forests. The results showed that the bamboo-Chinese fir-broadleaved mixed forest composed of 60%-80% bamboos, the bamboo-Chinese fir mixed forest and bamboo-pine-fir-broadleaved mixed forest with 60% bamboos had the more reasonable structure, and stronger natural reproduction ability, with the number of shoots per ha, the number of bamboo culm, new bamboo quality and mother bamboo shoots per plant, the number of bamboo and other production index greater than those of pure bamboo forest, while the bamboo-pine-broadleaved mixed forest composed of 60%-70% bamboo, the bamboo-pine-fir mixed forest with 60%-80% bamboo plants and the bamboo-pine mixed forest with 60% or 80% bamboo had the poor forest structure and natural reproduction ability, with the number of shoots per ha, the number of bamboo culm, new bamboo quality and mother bamboo shoots per plant, the number of bamboo and other production index lower than those of pure bamboo forest.