稻田杂草危害是影响水稻产量的重要因素之一,应用化学除草剂防除稻田杂草是一项重要的技术措施。但是,除草剂品种单一、应用不当,会造成杂草优势种及群落结构变化,往往一次用药不能有效控制杂草危害,在水稻生长中后期,田间又出现草荒现象。因此,探索一套有针对性的水稻田一次性 The damage of weed in paddy field is one of the important factors that affect the yield of rice. Application of chemical herbicide to control weed in paddy field is an important technical measure. However, the single herbicide species and improper application can cause the weed dominant species and the community structure to change. Often, the single herbicide can not effectively control the weed damage. In the middle and later stages of rice growth, grassland shortage occurs again. Therefore, to explore a set of targeted rice fields one-time