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冻雨灾害下青龙山林场树木损伤特征与抗性评估

Damage characteristics and resistance assessment of trees under freezing rain disaster in Qinglongshan Forest Farm

  • 摘要: 探讨冻雨灾害对不同树种的损伤类型及其脆弱性,揭示树木生物学特性与其抗灾能力之间的关系,为森林资源管理、冻雨灾害防护及林业可持续经营提供科学依据。通过分析2024年2月武汉市江夏区青龙山林场树木的损伤情况,应用描述性统计和单因素方差分析(ANOVA),主成分分析(PCA)和结构方程模型(SEM)评估树木特性与损伤类型之间的关系,相关分析(Pearson)探索次要影响,结果表明:(1)不同树种在损伤类型上存在显著差异。香樟和马尾松因冠幅较大、结构相对脆弱,表现出较高的腰折和断梢发生率;杉木在折枝方面受损明显,但整体损伤较轻。(2)树冠形状、枝干结构和木材密度等生物学特性是影响树木抗冻能力的关键因素,环境因素(如坡位和坡向)与树木损伤存在一定的相关性。冻雨频发区域应优先选择抗冻性强、恢复快的树种(如杉木),并减少香樟等易受冻害树种的栽种,以降低整体受灾风险。

     

    Abstract: This study investigates the damage types and vulnerability of different tree species caused by freezing rain disasters, reveals the relationship between the biological characteristics of trees and their disaster resistance capabilities, and provides a scientific basis for forest resource management, freezing rain disaster protection and sustainable forestry management. By analyzing tree damage data in Qinglongshan Forest Farm in Jiangxia District, Wuhan City, Hubei Province, China in February 2024, descriptive statistics, one-way analysis of variance (ANOVA), principal component analysis (PCA), and structural equation modeling (SEM) were used to evaluate the relationship between tree characteristics and damage types, and Pearson correlation analysis was used to explore the secondary influences. The results showed that: (1) There were significant differences in damage types among differetn tree species. Cinnamomum camphora (camphor tree) and Pinus massoniana (Masson pine), with their large crown sizes and relatively fragile structures, exhibited high incidences of trunk breakage and crown breakage, while C. lanceolata (China fir) showed prominent branch breakage but overall lighter damage severity. (2) Biological characteristics such as crown shape, branch structure, and wood density were key factors affecting freeze resistance, and there was a certain correlation between environmental factors (e.g., slope position and aspect) and tree damage. In freezing rain-prone areas, priority should be given to planting species with strong freeze tolerance and rapid recovery capacity (e.g., China fir), while reducing the planting of freeze-sensitive species like camphor trees to mitigate overall disaster risk.

     

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