DBH frequency distribution 径级频率分布
The results indicated that thinning based on small DBH had positive effect on stand distribution.
结果表明，以小径木为间伐对象的间伐作业对林分胸径分布有正面影响；
Based on analysis of population size class structure, the trend of population density of Schima superba changing with individual DBH was similar to skew normal distribution.
基于种群径级结构分析，木荷种群密度随个体胸径的变化趋势类似于偏正态分布形曲线。
应用推荐