乔木林可燃物载量空间分布研究——以吉安市为例

Spatial Characteristics of Fuel Loads in Arboreal Forests:a Case Study of Ji'an City

【目的】查清乔木林不同优势树种、不同龄组、不同郁闭度等级单位面积可燃物载量规律,为获取森林可燃物类型及分布数据提供参考。【方法】通过在吉安市布设了235个乔木林标准地开展调查后,对调查采样进行实验室测定。【结果】经数据对比分析得出:乔木林不同优势树种单位面积可燃物载量从大到小依次为混交树种、阔叶树种和针叶树种;不同龄组单位面积可燃物载量大小基本为成熟林>近熟林>中龄林>幼龄林;不同郁闭度等级单位面积可燃物载量从大到小依次为高郁闭度、中郁闭度和低郁闭度。研究结果在森林可燃物调查中指导分析乔木林不同类型森林可燃物类型及分布具有重要意义。

[Objective] Identifying the combustible load patterns per unit area of different dominant tree species(groups),age groups,and canopy closure levels in tree forests can provide a scientific reference for obtaining forest combustible types and distribution data.[Method] Based on a survey on 235 standard plots of tree forests in Ji'an City,laboratory measurements were conducted on the survey samples.[Result] Through data comparison and analysis,it was found that the combustible load per unit area of different dominant tree species(groups) in the tree forest was mixed tree species(groups),broad-leaved tree species(groups),and coniferous tree species(groups) in descending order;The fuel load per unit area of different age groups was basically mature forest>near mature forest>middle aged forest>young forest;The combustible load per unit area of different canopy closure levels was in descending order of high canopy closure,medium canopy closure,and low canopy closure.The research results are of great significance in guiding the analysis of the types and distribution of forest fuels in different types of tree forests in forest fuel surveys.