桂林岩溶石山阴香种群结构的研究

探讨了桂林岩溶石山阴香种群的高度、胸径和冠幅结构以及三者间的相互关系,并采用分异指数量化了种群个体间高度、胸围和冠幅结构的差异程度。结果表明:阴香种群个体高度集中分布在2-8m;胸径集中分布在2-6cm;冠幅多集中分布在1-4m,少数分布在5-7m之间;阴香种群个体的高度、胸围和冠幅多数为中等分异;阴香种群以幼树和小树个体占多数,自然更新能力较好,处于稳定的增长状态,这将有利于增加种群结构的复杂性和稳定性。

Structure of Cinnamomum burmannii Population in Karst hills of Guilin

The structure of plant height, diameter breast height (DBH) and crown diameter were studied in Cinnamomum burmannii population in Karst hills of Guilin, as well as their relationships. Differences in the plant height, perimeter at breast height and crown diameter of individuals of the population were determined by differentiation indices. Most individuals of the population were 2-8 m in plant height and 2-6 cm in DBH. The crown diameters of most individuals were 1-4 m with a few of 5-7 m. The plant height, perimeter at breast height and crown diameter of C. burmannii individuals were found moderately differentiated. C. burmannii population consisted mainly of young trees with good regeneration, which is beneficial to complexity and stability of the population.