海南省古榕树资源与生长特征研究

Resources and Growth Characteristics of Ancient Ficus microcarpa in Hainan

采用文献分析和野外植物调查法,对海南省古榕树(Ficus microcarpa)资源进行系统调查研究,分析古榕树的资源现状、分布格局和生长特征,构建树龄-树高模型,揭示海南省古榕树的衰老机制,为古榕树的日常养护管理和复壮提供理论和实践依据。结果表明:此次调查共记录到海南省古榕树3715株,呈集群分布,海口市和临高县分布株数较多,占总株数的48.7%;乡村是海南省古榕树的主要分布地点,占总株数的92.84%。大部分海南省古榕树生长状况和立地条件良好,树龄、胸径及树高结构均呈正态分布,拟合结果表明,逻辑斯蒂模型y=1.369/(1+7.053e-2.852x)(R2=0.998)适用于表示海南省古榕树的树龄与树高间的关系。叶片生理检测结果显示:古榕树正常株的叶绿素含量和SOD活性均高于衰弱株,但MDA含量低于衰弱株。这表明植物的叶绿素含量、SOD活性、MDA含量可作为判断古榕树衰老的生理指标。

The study used a combination of literature collection and field plant investigation to conduct a systematic of and study ancient Ficus microcarpa resources in Hainan Province.The resource status,distribution pattern,and growth characteristics of ancient F.microcarpa were analyzed,and a tree age-height model was constructed to reveal the senescence mechanism of ancient F.microcarpa in Hainan,and to provide theoretical and practical basis for the daily maintenance management and rejuvenation of ancient F.microcarpa.The results showed that a total of 3715 ancient F.microcarpa were recorded in Hainan Province,distributed in cluster.Haikou City and Lingao County had a higher distribution of trees,accounting for 48.7%of the total number of trees;the countryside is the main distribution area of Hainan ancient F.microcarpa,accounting for 92.84%of the total number of trees.Most of the ancient F.microcarpa also had good growth status and site conditions,and their age,diameter at breast height and height structure are normally distributed,and a logistic model equation of y=1.369/(1+7.053e-2.82)