南酸枣人工幼林根系与其树高、胸径的分形特征

Fractal Characteristics of Root System,Tree Height and DBH of Choerospondias axillaris

南酸枣为我国南方的多用途优良阔叶树种。依据3年和5年生的5种南酸枣林分类型林木的根系及树高、胸径的观测数据,应用分形理论,探讨了南酸枣人工幼林林木的根系与其树高、胸径的分形关系特征,揭示了林木根系的生长过程及其生物量的积累与空间分布规律。结果表明:根系与树高、胸径之间存在极显著的分形关系,说明南酸枣人工幼林根系生物量的累积及其空间分布是一个分形生长过程,它服从分形维数D值规律增长;根据分形模型可以估算林木根系的生产力。

Choerospondias axillaris is a superior multiple-use tree species in south China. According to data of root system, tree height and DBH of three years old and five years old stand, using the fractal theory, the fractal relationship between root system and tree height, DBH was studied. The course of root system grow, accumulation of biomass and spatial distribution pattern were studied as well. The results showed that there was significant fractal relationship between root system and tree height, DBH, the research results also implied that the biomass accumulation of root system of young Choerospondias axillaris plantation is a course of fractal grow, in compliance with the rule of D value in fractal dimension. The productivity of root system of forest trees can be estimated and calculated according to the fractal model.