近年来,随着种植业结构调整和耕作制度的改变,小麦田杂草种群变化和群落演替加速,一方面抗性播娘蒿、抗性荠菜等杂草发生面积和发生数量逐年增加;另一方面一些次要杂草逐渐成为主要杂草,尤其是禾本科杂草数量和种类上都在逐渐增多,部分地区小麦田 In recent years, with the adjustment of planting structure and farming system, weed population changes and community succession in wheat field are accelerated. On the one hand, the area and number of weeds occurring in Artemisia annua and Shepherd’s disease are increasing year by year. On the one hand, some minor weeds gradually become the main weeds, especially the grasses and weeds in the number and types are gradually increasing, in some areas of wheat