摘要
研究亚热带季风区内不同林型可燃物理化性质和燃烧性差异,用这种差异阻抗外界林火的干扰,对森林防火有极其重要意义。通过对亚热带季风气候区内不同林型理化性质及燃烧时间测定分析,结果表明:(1)不同林型中,针叶林含水率、燃点及粗灰分含量最低,粗纤维、粗脂肪及木质素含量最高,燃烧性最强。(2)不同树种均以树叶燃点最低、粗脂肪含量最高,树枝粗灰分及粗纤维含量最高;树叶易燃性强,而树枝则是燃烧性较强。(3)不同林型树叶燃烧时间与含水率显著相关,与粗灰分及粗纤维含量极显著相关;不同林型树枝燃烧时间与含水率、粗灰分及粗纤维含量显著相关,建立相关模型,可以揭示各种林型理化性质对可燃物燃烧性的影响机理。
It is very important to study and use the difference in physical-chemical properties and flammability of different forest types in the Semi-tropical monsoon area.The physical-chemical properties and combustion time of different forest types in the Semi-tropical monsoon area were determined and analyzed,with the following result:(1)In different forest types,the coniferous forest the moisture content,ignition point,and crude ash content were the lowest in the coniferous forest;but the crude fiber content,crude fats content,and lignin content were the highest,so the flammability was the strongest.(2) In different species components,the ignition point of leaves was the lowest with the highest crude fat content;the crude ash content and crude fiber content were the highest in branches,so leaves were easier to start burning,while the flammability of branches was stronger.(3) In different forest types,the combustion time of leaves had a significant correlation with moisture content,and had a very significant correction with crude ash content and crude fiber content,the combustion time of brancheshad a significant correlation with moisture content,crude ash content and crude fiber content.Correlative models could reveal the influencing mechanism of physical-chemical properties of different forest types to flammability.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第6期1149-1154,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(40865004)
关键词
森林可燃物
理化性质
燃烧性
林型
forest fuel
physical and chemical properties
flammability
forest types