近年来，北方农垦水稻种植面积不断扩大，而稻田杂草的防除是影响水稻产量的重要因素。由于一些除草剂连年使用，使杂草种群发生了变化，造成除草剂除草效果下降。为了能选择出适合于本地应用的除草效果好、对水稻安全、比较经济的化学除草技术，进行了下列田间试验。１　试验 In recent years, the planting area of ​​paddy rice in North China has continuously expanded, and the control of weeds in paddy fields has become an important factor affecting rice yield. As some herbicides are used year after year, weed population has changed, resulting in herbicidal herbicidal effect decreased. In order to select a suitable herbicidal effect for local applications, the safe and economical chemical weed control technology for rice, the following field trials were conducted. 1 test