为了防止森林火灾,北方林区年年要在春秋季节打烧防火线,但遇有旱情或没有掌握好天气条件,又容易跑火成灾。这是一个很大的矛盾。大兴安岭防火办为了改变因烧防火线跑火的被动局面,选用百草枯不同浓度的溶液对各种杂草进行喷洒灭草,收到了较好的效果。试验地点、工具和方法试验地点是大兴安岭甘河支岔的草塘 In order to prevent forest fires, the northern forest areas have to fire fireproof lines every spring and autumn, but in the event of drought or lack of good weather conditions, they easily run fire and become disaster victims. This is a big contradiction. Daxinganling Fire Office in order to change the fire line due to burn fire passive situation, the use of different concentrations of paraquat solution of various weeds spray weed, received good results. Test sites, tools and methods Test site is the Daxinganling Gan River branch fork grass pond