华山松小枝的耐火性模型研建

Modeling on Fire Resistance of Small Branches of Pinus armandii

[目的]探索小枝的耐火性及其主要的影响因子。[方法]在2009年森林防火紧要期,用自行设计的装置对华山松小枝进行耐火性试验。[结果]建立华山松小枝韧皮部死亡率与枝直径、受热时间、受热温度、韧皮部所在枝段是否有叶的关系模型。[结论]4个因子对韧皮部死亡率的影响程度从大到小依次为受热温度、受热时间、取皮枝段是否有叶、枝直径。

[Objective] The research aimed to probe into the fire resistance and main correlation factors of small branches of P. armandii. [Method] Fire resistance experimentations of small branches were tested during the highly dangerous period of forest fire in 2009 with experimental equipment designed by the authors. [Result]The mortality rate model of phloem was established. [Conclusion]The main factors that influenced the fire resistance of P. armandii branches were arranged in order of temperature, heating time, growing leaves or not on the sample section and diameter of branch.