摘要
为准确、全面地了解蓝山县的古树名木资源现状,文中采取查阅资料与实地调查相结合的方法,对蓝山县古树名木的资源特征、空间分布与生长状况进行统计与分析。结果表明:1)蓝山县现存古树名木1 111株,隶属于30科59属80种,枫香、樟、马尾松、侧柏、朴树等为主要优势树种;2)从树龄结构看,蓝山县整体树龄结构呈金字塔形状,三级古树数量最多,占比64.54%,树龄大于1000 a的古树有3株银杏和1株黄连木;3)从径级结构看,树高主要集中在10~20 m和20~30 m这两个区间,胸径主要在1 m以下,冠幅主要集中在10~20 m区间;4)从空间分布和生长状态看,蓝山县的古树名木呈现出明显的聚集特征,存在1个高密集区中心和3个次密集区中心,分布位置主要在农村,生长势正常的占比51.4%;5)从立地条件看,生长在平坡、缓坡和无坡向的古树名木数量最多。总体来看,蓝山县古树名木资源丰富,其数量和种类的分布特征呈现出一定的空间聚集性,坡度、人口密度、土地利用类型等因素均对古树名木的空间分布产生显著影响。
In order to explore the resources of ancient and famous trees in Lanshan County,the paper adopts the methods of literature review and field investigation to statistically analyze the characteristics,spatial distribution and growth of ancient and famous trees.The results show that:1)There are 1111 ancient and famous trees in Lanshan County,belonging to 80 species in 59 genera of 30 families,and the dominant tree species are Liquidambar formosan,Cinnamomum camphora,Pinus massoniana,Platycladus orientalis and Celtis bungeana;2)The overall tree age structure is in the pyramidal shape,while the third-grade old trees are in the largest number,accounting for 64.54%.The ancient trees older than 1000 a include 3 Ginkgo biloba and 1 Pistacia chinensis;3)From the perspective of diameter class structure,the height of the ancient trees is mainly concentrated in the ranges of 10-20 m and 20-30 m,the diameter at breast height is mainly less than 1m,and the crown width is concentrated in 10-20 m;4)In terms of spatial distribution and growth state,ancient and famous trees show the obvious aggregation characteristics,with 1 high-dense central region and 3 sub-dense central regions.They are mainly distributed in rural areas,and 51.4% of the trees have normal growth potential;and 5)From the site condition,the number of ancient and famous trees on flat slope,gentle slope and no slope direction is the largest.Overall,Lanshan County has abundant resources of ancient and famous trees,and their distribution characteristics are significantly influenced by the factors such as slope,population density,and land uses.
作者
马山虎
赵亚梅
黄庆文
何斌
吕正旺
余席春
李姣凤
Ma Shanhu;Zhao Yamei;Huang Qingwen;He Bin;Lyu Zhengwang;Yu Xichun;Li Jiaofeng(Lanshan County Forestry Bureau,Yongzhou 425800,Hunan,China)
出处
《中国城市林业》
2024年第5期182-189,共8页
Journal of Chinese Urban Forestry
关键词
蓝山县
古树名木
空间分布
资源组成
Lanshan County
ancient and famous tree
spatial distribution
resources composition
