翁源县古树资源特征与空间分布特征分析

Resource Characteristics and Spatial Distribution Characteristics of Ancient Trees in Wengyuan County

以翁源县调查登记的古树为研究对象,进行资源特征与空间分布特征分析。结果表明:翁源县现有古树433株,隶属于20科24属29种,以樟Camphora officinarum、龙眼Dimocarpus longan、马尾松Pinus massoniana等乡土树种为主。从结构特征上看,树龄主要集中在100~210 a,平均树龄为170 a;树高主要集中在11~16 m,平均树高为14.14 m;胸径主要集中在0.50~1.00 m,平均胸径为0.89 m;冠幅主要集中在10.00~16.25 m,平均冠幅为14.19 m。从生长状况上看,生长势正常、衰弱、濒危、死亡的古树分别有356,16,5,56株。从空间分布特征上看,古树在8个镇区均有分布,呈聚集型分布,存在6个核密度估计值较高且聚集古树15株以上的集聚区。风俗文化和自然环境是影响翁源县古树种类组成的重要原因。

Taking the ancient trees registered in Wengyuan county as the research object,the resource characteristics and spatial distribution characteristics are analyzed.The results show that there are 433 ancient trees in Wengyuan county,belonging to 29 species in 24 genera of 20 families,the dominant species are Camphora officinarum,Dimocarpus longan,Pinus massoniana.According to the structural characteristics of the ancient trees,the age of the trees is mainly concentrated in 100-210 years,the average age is 170 years,the height is mainly concentrated in 11-16 meters,the average height is 14.14 meters,the DBH mainly concentrated in 0.50-1.00 meters,the average DBH is 0.89 meters,the crown width mainly concentrated in 10.00-16.25 meters,the average crown width is 14.19 meters.According to the growth vigor,the number of healthy,weak,endangered and dead plants are 356,16,5 and 56.In terms of spatial distribution characteristics,the ancient trees are distributed in all 8 towns,showing an aggregation pattern,there are 6 clusters with high kernel density estimates and more than 15 ancient trees.The custom culture and natural environment are the important reasons that affect the species composition of ancient trees in Wengyuan county.