采用田间小区试验方法,进行了80%滴丁·乙乳油播后苗前土壤封闭处理防除大豆田杂草田间药效试验。结果表明,80%滴丁·乙乳油对大豆田杂草有较好的防除效果,对单、双子叶杂草均有较高防效,45d株总防效为78.22%～91.38%,鲜重总防效为79.68%～91.38%,随使用剂量增加,药效逐渐提高,以400g/667m2防效最好,而且对大豆出苗及生长发育无不良影响,增产幅度为10.85%～14.55%。 Field experiments were conducted to determine the efficacy of 80% Dibutyl-B-galactosidase seedlings in soil-seeding control before weeding. The results showed that 80% D-B EC had better control effect on weeds in soybean field and higher control effect on single weed and dicotyledonous weeds. The total control effect of 45 d strains was 78.22% -91.38%, the total fresh weight The control effect was 79.68% ~ 91.38%. With the increase of dosage, the efficacy was gradually increased. The effect of 400g / 667m2 was the best, and had no adverse effect on the emergence and growth of soybean. The yield increase ranged from 10.85% to 14.55%.