| 马溶骏.昆明市东川区古树资源分布特征及影响因素研究[J].林业调查规划,2025,50(4):111-117 |
| 昆明市东川区古树资源分布特征及影响因素研究 |
| The Effects of COS, GA3, and KH2PO4 Soaking onZanthoxylum bungeanum Seed Germination |
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| DOI： |
| 中文关键词: 古树 资源特征 空间分布 影响因素 昆明市东川区 |
| 英文关键词: ancient trees resource characteristics spatial distribution influencing factors Dongchuan
District of Kunming City |
| 基金项目:中央财政林业科技推广示范项目(云〔2022〕TG15 号,云〔2024〕TG29 号). |
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| 中文摘要: |
| 为进一步掌握昆明市东川区古树名木资源组成,探究空间分布类型及其影响因素等,基于
2023—2024年调查数据,使用最邻近指数、核密度分析、近邻分析等方法对研究区内古树进行详细
调查与分析。结果表明,研究区古树总数量为262 株,隶属24科45属57种,三级古树占总数量的
79.8%,平均树龄为221 a,整体呈低龄化特征;最邻近指数R为0.42(R<1),在空间上呈聚集型分
布,且核密度分析发现其主要集中分布于研究区东部;古树分布于距河流0~2 km,海拔1 900~
2 200 m,坡度5°~15°,坡向以西北方向占比最高,阳坡古树数量略多于阴坡;不同土地利用类型占
比大小依次为农田>林地>草地>不透水面>裸土地>水体。昆明市东川区古树资源丰富,其在空间
分布上表现为聚集型分布,河流、海拔、坡度、坡向、土地利用等因素显著影响古树分布。 |
| 英文摘要: |
| To further understand the composition of ancient and famous tree resources in Dongchuan District
of Kunming City, and explore their spatial distribution patterns and influencing factors, a detailed investigation
and analysis were conducted based on survey data from 2023 to 2024 using methods such as
the nearest neighbor index, kernel density analysis, and proximity analysis. The results showed that the
total number of ancient trees in the study area was 262, belonging to 24 families, 45 genera, and 57 species.
Third-grade ancient trees accounted for 79.8% of the total, with an average age of 221 years, indicating
a generally young age structure. The nearest neighbor index R was 0.42 (R<1), suggesting a
clustered spatial distribution, and kernel density analysis revealed that they were mainly concentrated in
the eastern part of the study area. The distribution of ancient trees was observed within 0-2 km from rivers,
at elevations of 1 900-2 200 m, on slopes of 5°-15°, and with the highest proportion facing northwest. The number of ancient trees on sunny slopes was slightly higher than on shady slopes. Among different
land use types, the proportions followed the order: farmland > woodland > grassland > impervious
surfaces >bare land>water bodies. Dongchuan District of Kunming City is rich in ancient tree resources,
exhibiting a clustered spatial distribution, with factors such as rivers, elevation, slope, aspect, and land
use significantly influencing their distribution. |
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