云南松是我国西南林区的主要组成树种,分布于四川西南和云南大部,面积3 267万亩,蓄积2.78亿立方米。云南松分布区地处我国横断山系,自然地理环境特殊,冬春季受到西风环流南支急流的控制,气候干暖、少雨,加之此时正是云南松及其林下灌丛、草本的休眠期,林下枯枝落叶最容易着火,酿成森林火灾。因此,云南松林区是我国森林火灾最严重地区之一。据对四川的多年统计,云南松林区森林火灾受害面积占全省的80%,相应地云南省占70%以上,该省在 Pinus yunnanensis is the main tree species in southwestern China. It is distributed in southwestern Sichuan and most of Yunnan, covering an area of ​​2667 mu with an accumulated volume of 278 million cubic meters. Yunnan pine distribution area is located in China’s Hengduan Mountains, the special geographical environment, the winter and spring by the westerly circulation south branch rapids control, dry climate, less rain, at this time is the Pinus yunnanensis and its shrubs, herb dormant period , Litter under the forest most likely to catch fire, causing a forest fire. Therefore, Yunnan Songlin District is one of the most serious forest fires in our country. According to the statistics of Sichuan for many years, the forest fire damage area in Songlin District of Yunnan Province accounts for 80% of the province’s total, correspondingly, Yunnan Province accounts for more than 70%