武汉市常见树种凋落枝叶易燃性分析
Analysis of flammability of common tree species in Wuhan City
研究武汉市4种常见树种，马尾松(Pinus massoniana Lamb.)、栓皮栎(Quercus variabilis Blume，)、油茶(Camellia oleifera Abel.)和山胡椒(Lindera glauca(Siebold&Zucc.)Blume)的凋落枝叶为研究对象，进行理化性质试验，采用聚类分析和主成分分析将凋落物分难燃、可燃、易燃三个等级。结果表明：油茶叶及小枝的热值低、燃点高、点燃时间长、木质素含量低，表现出较强的阻火性能，同时，与油茶叶及小枝混合的树种，均表现阻火性能提升;山胡椒枝的燃点高、点燃时间长，燃烧性较弱，但其落叶却相反，可见山胡椒落叶易燃，小枝耐火;马尾松落叶凋落枝热值高、燃点低、点燃时间快、木质素和纤维素含量高，易燃性较强，与马尾松枝叶混合的树种，均有易燃趋势。油茶凋落枝叶难燃，可作为森林防火树种。由马尾松组成的混交林，具有较高火灾风险，应重点监管。该研究可为武汉市防火树种筛选以及防火林带的建设提供参考。
The physical and chemical properties of four common tree species,Pinus massoniana Lamb.,Quercus variabilis Blume,Camellia oleifera Abel.,and Lindera glauca(Siebold&Zucc.)Blume,in Wuhan City were studied.Cluster analysis and principal component analysis were used to divide the litter into three grades:refractory,flammable and flammable.The results showed that oil tea and twigs had low calorific value,high ignition point,long ignition time and low lignin content,showing strong fire resistance.At the same time,the fire resistance of the tree species mixed with oil tea and twigs was improved.The burning point of the branch is high,the ignition time is long,and the flammability is weak,but the fallen leaves are the opposite.It can be seen that the fallen leaves of the pepper are flammable and the twigs are fire-resistant;p.massoniana leaf litter branches have high calorific value,low ignition point,fast ignition time,high lignin and cellulose content,and strong flammability.Tree species mixed with P.massoniana branches and leaves have a flammable trend.The litter leaves of Camellia oleifera are flame retardant and can be used as forest fire prevention tree species The mixed forest composed of Pinus massoniana has a high fire risk and should be supervised.This study can provide reference for the selection of fire-resistant tree species and the construction of fire-resistant forest belts in Wuhan.
何琬琬;
华中农业大学 武汉 430000;
forest fire littering branches and leaves physicochemical properties flammability wuhan City
201-211 / 11
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