多年来我省大豆田所用的除草剂品种,都是土壤处理剂。氟乐灵于大豆播前土壤处理并将药剂耙入土内,另一些除草剂如拉索等则于大豆播后苗前土壤处理,其药效发挥均极大地受土壤水分影响,加之我省的气候特点是十年九春早,因而常常达不到完全控制大豆地杂草的目的。另外除草剂的品种单一是存在的另一个问题,需要一个包括播前或苗前除草剂同适时的苗后除草剂处理相结合,以及同中耕相结合,既提高除草效果又提高大豆产量的除草体系。我们于1979年搞了苗后叶面处理和苗前土壤处理类型的除草 Over the years the province of soybean used in herbicide varieties, are soil treatment agent. Trifluralin before sowing soil processing and pesticides rake into the soil, and some other herbicides such as cable and so on sowing after sowing before the soil treatment, its efficacy are greatly affected by soil moisture, combined with the province Climatic characteristics are ten years nine spring early, and therefore often do not achieve the purpose of complete control of weeds in soybean. Another problem with the single herbicide variety is the combination of a combination of timely pre-emergence or pre-emergence herbicide treatment with timely post-emergence herbicide treatment and weeding combined with tillage to both increase herbicidal activity and increase soybean yield system. We engaged in weeding in 1949 and post-emergence foliar treatments and pre-emergence soil treatments