云南省澜沧县云南方竹种群结构

采用样方法对云南省澜沧县竹塘乡茨竹河村人为条件影响下生长的云南方竹种群结构进行调查，结果表明：在云南方竹种群年龄结构中Ⅱ龄级所占比例最大，占48.8%，其次为Ⅰ龄级和Ⅲ龄级，分别占调查竹株总数比例的26.5%和18.4%；胸径主要分布范围为2.1~3.5 cm，占总体数量的87.4%；竹株高度则主要分布范围为3.1~12.0 m，占总体数量的87.3%。澜沧县方竹种群年龄结构变化的总体趋势是随着分株年龄的增大，分株在整个种群中所占的比例逐渐减少。云南方竹种群呈增长趋势。

Population Structure of Chimonobambusa yunnanensis in Lancang County,Yunnan Province

The paper investigates the population structure of Chimonobambusa yunnanensis, which is growing under human inventions in Cizhuhe village, Zhutang township, Lancang county, Yunnan province, using sampling method. The results show that the age structure of C. yunnanensis population is dominated by the second age class, accounting for 48.8%, followed by the first age class and the third age class, which account for 26.5% and 18.4%, respectively; DBH is mainly distributed in the range of 2.1-3.5 cm, accounting for 87.4% of the total. The overall trend in the age structure of the C. yunnanensis population in Lancang county is that the proportion of the whole branch strain gradually decreases as the branch age increases. The C. yunnanensis population in shows a growing trend.