利用云南松树冠部分的易燃可燃物调查取得的资料,将树冠分为3个层次,每个层次按照标准分为1时滞(<1 cm)、10时滞(1~2.5 cm)、100时滞(≥2.5 cm)3类,分别分析不同层次与不同时滞的枝、针叶之间的关系。结果表明:云南松树冠各层的易燃可燃物的重量均随着径级的增大而增大;云南松树冠叶量的多少与火灾的发生有着很密切的联系,但是叶量多少并不能完全决定火灾发生的程度。 According to the data obtained from the investigation of flammable combustibles in Yunnan pine canopy, the canopy is divided into three levels, each level is divided into 1 lag (<1 cm), 10 lag (1 ~ 2.5 cm), 100 Time-lag (≥2.5 cm), the relationships between branches and needles at different levels and with different time-lags were analyzed respectively. The results showed that the weight of flammable combustibles in all layers of Pinus yunnanensis increased with the increase of diameter. The amount of canopy of Pinus yunnanensis was closely related to the occurrence of fire, but the amount of leaf did not Completely determine the extent of the fire.