防火林带的理论与应用

所有的森林植物都有可能着火燃烧，防火林带实质上只是其在遇到林木时与其它林木相比不易点燃。防火林带阻火机理有三个层次：防火树种、结构合理的防火林带及其形成的火环境。枝叶茂盛的树冠能有效阻挡火陷的蔓延；良好的林带结构易于形成不利于可燃物燃烧的环境，并使可燃物呈不连续分布；防火林带组成的网格还对大面积的针叶纯林有机械隔离的作用。理想的防火林带树种要求具有较强的阻火能力，且适应性强，常绿、树冠结构紧密、种

The Theory and Application of Fire-resistant Forest Belts

All of the plants can be combusted, and the mechanism of forest belts resistance is that the tree species weren't liable to be burning compared with other plants. The fire resistance mechanism lies in three aspects, namely fire resistant tree species,rational construction forest belts and its environment.Tree crowns can hamper fire forward; forest belts can form the environment which is not help to fire,and they also make fuels distributed discontinuous. The network of forest belts has large area of conifer forest segregated. The ideal fire resistant tree species should embrace some characteristics, such as fire resistance,adaptation,evergreen,crown tightly,planting easily and having benefits. So the tree species must require high fire resistance and rational afforested and biological characteristics.