小蓬竹种群结构研究

Studies on the population structure of Ampelocalamus luodianensis

利用样方调查法,研究了贵州董架乡小蓬竹种群的结构特征。结果表明:小蓬竹无性系种群中1、2年生竹比例超过了50%,2、4年生竹数量多于1、3年生竹,个体地径主要集中在0.400～0.698 cm范围内,4～6 m高度级个体数量比例最大。小蓬竹丛平均地径与丛株数大小具有显著的正相关性。由此说明,该种群目前处于增长状态、种群结构基本合理并具有一定的大小年现象,小蓬竹竹丛数量随丛株数的增加呈下降趋势,丛株数为10株以上的竹丛,其平均年龄较为稳定。

Objective to investigate the present growth status and future development trends about Ampelocalamus luodianensis population,the structural characteristics of A.luodianensis population in Dongja township of Guizhou province were studied.The results indicated that the number of one year and two years bamboos were more than 50 %.The number of one years and three years bamboos were fewer than the number of two years and four years old plants.Most ground diameter of individuals were between 0.400 cm and 0.698 cm and the heights of individuals were mainly from 4 m to 6 m.There was a notable positive correlation between the number of plants and average ground diameter in clusters.The results showed that the population was in growth states and the population structure was basically reasonable.It had the phenomenon of on and off-year in A.luodianensis population.The number of clusters showed the downtrend with the increases of number of plants in clusters.The average age of clusters was stabilized when the number of plants in clusters was above 10.