稻田杂草因与水稻争水、争肥、争光,同时还是一些病虫害的寄主,因此严重影响了水稻的生长发育以及产量、品质。研究显示,当直播田稗草平均密度达30.6株/平方米时,水稻将减产73.5%。近年来,随着轻型、便捷型栽培方式的大面积推广,稻田杂草呈现种类增多、多发混发的态势,对水稻生产的不利影响日益增加。同时,由于稻田杂草防除难度增大,以及化学 Paddy field weeds competing with rice, fight fertilizer, glory, but also the host of some pests and diseases, thus seriously affecting the growth and development of rice and yield, quality. The results showed that when the average density of barnyard grass in direct seeding reached 30.6 plants per square meter, the yield of rice would be reduced by 73.5%. In recent years, along with the large-scale popularization of light and convenient cultivation methods, weeds in paddy fields show an increasing number of species with frequent occurrence of mixed hair and have an increasing negative impact on rice production. At the same time, due to the increased difficulty of paddy field weed control, as well as chemistry