海南岛甘什岭无耳藤竹地径与节长分布特征

Distribution characteristics of basal diameter and internode length of Dinochloa orenuda in Ganshenling,Hainan Island

藤本竹植株奇特,秆呈攀缘状,类似藤本植物。以海南岛甘什岭地区自然分布的无耳藤竹(Dinochloa orenuda)为研究对象,采用KS检验算法,探讨其地径与节长的分布结构,以进一步揭示其生物生态学特征。结果表明:海南岛甘什岭无耳藤竹的地径范围为11.92~47.60 mm,其分布服从正态分布、对数正态分布和Γ分布,且原数值与正态分布的理论值相似率最高,其次为Γ分布,再次为对数正态分布;单节节长范围为23.33~43.33 cm,其分布服从正态分布、Weibull分布和Γ分布,且原数值与正态分布的理论值相似率最高,其次为Weibull分布,再次为Γ分布。海南岛甘什岭自然分布的无耳藤竹地径结构合理,生长势良好;节长与四川和云南威信自然分布的羊竹子(Ampelocalamus saxatilis)相似。在今后的开发利用中,无耳藤竹可作特色园林用竹,或通过加骨造型作为竹廊,也可作为山体修复的生态用竹。

Rattan-like bamboos are quite unique, which have scrambling-like stems and rattan-like shapes. In this study, the distribution characteristics of basal diameter and internode length of naturally distributedDinochloa orenudain Ganshenling, Hainan Island were analyzed using Kolmogorov-Smirnov algorithm, and its biological and ecological characteristics were further revealed. The results showed that the basal diameter ofD. orenudain Ganshenling, Hainan Island ranged 11.92-47.60 mm, and the distribution of basal diameter obeyed normal distribution, log-normal distribution and gamma distribution. The theoretical value of normal distribution was the most similar to the original value, followed by gamma distribution and log-normal distribution. The internode length ofD. orenuda ranged 23.33-43.33 cm. Its distribution obeyed normal distribution, Weibull distribution and gamma distribution. The theoretical value of normal distribution was the most similar to the original value, followed by Weibull distribution and gamma distribution. The basal diameter’s distribution ofD. orenuda in Ganshenling, Hainan Island was rational, and internode length ofD. orenudawas similar toAmpelocalamus saxatilis in Sichuan and Weixin of Yunnan.D. orenudacan be exploited as garden bamboo or bamboo corridor by molding, it can also be greening bamboo in mountainous regions.