近几年黑龙江省嘉荫农场由于忽视对问荆的防治 ,使问荆成为危害大豆田的主要杂草之一。大面积使用化学除草剂 ,一般的田间杂草都能防除 ,但对问荆只能暂时起到抑制作用 ,问荆的适应力、再生力不断提高 ,草荒呈蔓延趋势 ,特别是干旱年份与大豆争温、争水、争养分 ,造成田间荫蔽 In recent years, Jiayin County, Heilongjiang Province, neglected the prevention and control of Jing, making Jing become one of the major weeds that endanger the soybean fields. Large area use of chemical herbicides, the general field of weeds can be controlled, but the resistance Jing can only temporarily play a role in restraint, asked Jing adaptability and regeneration continue to increase, the grass is desiccation trend, especially in dry years and soybeans Contention temperature, water, fight for nutrients, resulting in shade the field