我区地处“三北”,大部地区属于干旱、半干旱气候带,生态系统非常脆弱,因此,森林资源在我区显得十分宝贵.我区林业面临的主要灾害是森林火灾、病虫害和乱砍滥伐。这“三害”对我区的森林资源危害十分严重。 1987年,我区大兴安岭林区发生4次较大山火,虽经尽力扑救,还是有250万亩森林严重受灾. My district is located in the “Three Norths”, most of the area belongs to the arid and semi-arid climate zone, the ecosystem is very fragile, therefore, the forest resources are very valuable in our district.Mainland forestry in our region is the main disaster forest fires, pests and diseases Deforestation. This “three evils” is very harmful to the forest resources in our district. In 1987, four large fires took place in the Greater Khingan Range forest area in our district. Despite the best efforts, there were still 2.5 million mu of forest seriously affected.