| 摘要: |
| 黄山松 Pinus taiwanensis 是中国特有造林树种，具有重要的生态和经济价值。为了给黄山松林
的可持续经营提供理论参考，文章以浙江四明山黄山松针阔混交林为研究对象，利用基于 4 株最近相邻
木关系的混交度、大小比数、角尺度和密集度 4 个空间结构参数，分析了该林分的空间结构参数多元分
布特征。结果表明：从零元分布看，林分总体上处于中度与强度混交之间的中庸的聚集分布的中等密集
状态；从一元分布看，一半以上林木为随机分布，处于各生长状态或各密集程度的林木比例相近；从二
元分布看，极强度混交—优势状态林木最为常见，且林木多数处于很稀疏状态的分布格局。大小比数等
级与密集度等级呈一一对应关系，即林木处于优势—很稀疏、亚优势—稀疏、中庸—中等密集、劣态—
比较密集、绝对劣态状态—很密集的一一对应关系，其中以优势 - 很稀疏的林木比例最高；从三元分布
看，空间结构参数的不同组合下，林木均以随机分布状态最多，以极强度混交—优势状态—随机分布林
木、极强度混交—优势状态—很稀疏分布林木、极强度混交—随机分布—很稀疏分布林木、优势状态—
随机分布—很稀疏分布林木的最为常见；从四元分布看，极强度混交的优势状态的随机分布的很稀疏分
布林木最常见。 |
| 关键词: 四明山 黄山松 针阔混交林 空间结构 多元分布 |
| DOI： |
| 分类号: |
| 基金项目:宁波市科学技术局公益性计划项目(2021S019) |
|
| Multivariate Distribution Characteristics of Stand Spatial Structural Parameters of Pinus taiwanensis Coniferous-broad Leaved Mixed Forest in Siming Mountain |
|
LOU Minghua1, YANG Tonghui1, WANG Weibing2, MAO Jianfang2, XU Jing2, ZHANG Jianhong1
|
|
1.Ningbo Academy of Agricultural Sciences,Ningbo;2.Ningbo Forest Farm,Ningbo
|
| Abstract: |
| Pinus taiwanensis is an endemic afforestation species in China with important ecological and
economic values. In order to provide a theoretical reference for the sustainable management of P. taiwanensis
forest, this paper takes the P. taiwanensis coniferous-broad leaved mixed forest in Siming Mountain of Zhejiang
Province. Four spatial structure parameters, including mingling, uniform angle index, neighborhood comparison, and crowding degree, based on the relationship between 4 nearest neighboring trees, were used to analyze the
multivariate distribution of spatial structure parameters of P. taiwanensis coniferous-broad leaved mixed forest
in Siming Mountain, Zhejiang Province. The results showed that, according to the zero-element distribution,
the stand was in the state of middle growth, of middle crowding, between middle and intensity mingling, and
aggregation distribution. According to the univariate distribution, more than half of the trees were randomly
distributed, and proportions of trees were similar in each growth state or each crowding degree. According to
the bivariate distribution, trees of extremely mingling-dominant state was the most common, and most of them
were in extremely sparse state. There was a one-to-one correspondence between neighborhood comparison
and crowding degree, namely dominant growth-extremely sparse state, sub-dominant growth-sparse state,
middle growth-middle crowding, subordinate growth-more crowding, absolutely subordinate growth- extremely
crowding, and the highest proportion of trees was in dominant growth-extremely sparse state. According to
the trivariate distribution, trees were most randomly distributed in different combinations of spatial structure
parameters, and the common states were extremely mingling-dominant growth-randomly distribution, extremely
mingling-dominant growth-extremely sparse, extremely mingling- randomly distribution-extremely sparse,
dominant growth-randomly distribution-extremely sparse. According to the quadrivariate distribution, the most
common state was extremely mingling-dominant growth-randomly distribution-extremely sparse. |
| Key words: Siming mountain Pinus taiwanensis coniferous-broad leaved mixed forest spatial structure multivariate distribution |
