乙草胺是一种选择性芽前除草剂,1991～1993年我们进行了不同剂量和不同时期使用乙草胺对春大豆旱地杂草防除效果和春大豆增产效应试验研究。结果表明:亩用50％乙草胺乳油50ml 并在播种当天施用,杂草防除效果在88.9％以上。鲜重防效达80.6％。大豆实际增产率86.55％。在生产上具有较高的推广 Acetochlor is a selective pre-emergent herbicide. From 1991 to 1993, we conducted experiments on the control effects of acetochlor on weeds in spring soybean and the yield-increasing effect of spring soybean at different doses and periods. The results showed that 50ml of 50% acetochlor EC was applied on the day of sowing and the weed control effect was over 88.9%. Fresh weight control effect of up to 80.6%. The actual yield of soybean 86.55%. In the production of a higher promotion