滇中地区火烧迹地地盘松幼林的燃烧特性

采集重大森林火烧迹地地盘松幼林的地表可燃物，以铁质燃烧床为主要实验仪器测试其燃烧特性。结果表明：地盘松幼林地表可燃物燃烧时产生的火强度属于低强度火，其中火焰热辐射、蔓延速率、火焰高度、火焰最高温度、火焰维持时间和火强度分别为(2.71±0.74） kW/m²、（0.41±0.11） m/min、（37.10±15.52） cm、（462.90±60.26） ℃、（4.24±1.07） min、（185.31±131.53） kW/m。无焰燃烧时的热辐射和温度分别为（2.40±1.52） kW/m²、（325.00±64.97） ℃。地盘松幼林的阻滞时间为100 s左右。距离火焰30~150 cm处，30~133 s内温度呈现急剧上升后急剧下降的趋势，且只有一个峰值；距离火焰10 cm处维持高温的时间较长，火灾隐患较大，灭火时应多注意防止发生复燃的现象。

Burning characteristics of the young forest of pinus yunnanensis in forest fire sites in central Yunnan

The surface combustibles at forest fire sites of young forest of pinus yunnanensis were collected,and laboratory experiments on samples were carried out mainly by the iron combustion bed.The results showed that:the fire intensity generated by the burning of surface combustibles in the young forest of Pinus yunnanensis is low.Flame heat radiation,spread rate,flame height,flame maximum temperature,flame holding time and fire intensity are(2.71±0.74)kW/m^2,(0.41±0.11)m/min,(37.10±15.52)cm,(462.90±60.26)℃,(4.24±1.07)min and(185.31±131.53)kW/m,respectively.The heat radiation and temperature during flameless combustion are(2.40±1.52)kW/m^2 and(325.00±64.97)℃,respectively.The blocking time of the young forest of Pinus yunnanensis is about 100 s.The temperature at 30~150 cm away from the flame shows a sharp decline after a sharp rise in 30~133 s,and there is only one peak.The time to maintain high temperature at 10 cm away from the flame is long,the fire hazard of such fire is large,and more attention should be paid to prevent reignition when extinguishing.