扑救森林火灾付出的人力、物力代价很高,甚至因扑火而被烧死者屡见不鲜,因此,人们在实践中十分重视探讨防火的技术,如开设防火线(路)来阻隔山火的蔓延。由于防火线(路)要年年维修,费用大,效果也不理想。为了探索新的途径,由于阔叶树含水量大不易燃烧,在防火线(路)上营造阔叶树,形成防火林带,这是比较理想的一项有效防火措施。我县在五十年代就开始营造以抗火效果较好的木荷为主的防火林带。目前全县木荷防火林带长度已达205公里,这些“绿色长城”曾六次有效地阻止 Therefore, people attach great importance to exploring fire prevention technologies in practice, such as setting up a fire line to prevent the spread of mountain fire. As the fire line (road) to be annual maintenance, costly, the effect is not satisfactory. In order to explore new ways, because broad-leaved tree water content is not easy to burn, in the fire line (road) to create broad-leaved trees, the formation of fire belts, which is an ideal an effective fire prevention measures. In the 1950s, our county started to create a fire-retardant forest belt dominated by fire-fighting woody trees. At present, the entire county Muhe fire-retardant forest belt length has reached 205 kilometers, these “green Great Wall” has effectively stopped six times