我处是人少地多的黑龙江垦区,又是国家重要的大豆商品粮基地,杂草危害是大豆高产的主要限制因子之一。据调查,有杂草23科,47属,67种,土壤中草籽全层感染,出土杂草每平方米达千株以上,重者达万株以上,从早春到晚秋,各种杂草陆续出土危害,过高温多雨,则暴发齐长,大豆减产达50％,个别地块甚至绝产。化学除草收到了工省效宏的效果,豆田的主要杂草一稗草几乎被彻底征服,但宿根性、多年生和双子叶草却又繁衍起来。 1987年,我们在6队和11队共1260亩的大豆田实施了“以轮作换茬,科学耕作,加强选种,机械苗耙,中耕除草,并进行除草剂混用(6队用氟乐灵加灭草猛进行播前土壤处理,11队用杜尔加2.4D-丁酯进行播后苗前喷撒地表),辅以后期人工拿漏网大草”的综合灭草措施,收到了良好的灭草效果,从而使经济效益大幅度提高。普阳农场6队,综合 It is one of the major limiting factors for the high yield of soybean in China. According to the survey, there are 23 families, 47 genera and 67 species of weeds in soil, and the soil is full-layer infected with grass seeds. There are more than a thousand weeds per square meter of weeds and more than 10,000 strains of weeds. From early spring to late autumn, One after another unearthed hazards, over temperature and rainy, the outbreak Qi long, soybean yield reduction of 50%, even individual plots of land. Chemical weeding has received the effect of macroeconomic efficiency, the barnyardgrass, a major weed in the field, is almost completely conquered, but perennial, perennial and dicotyledonous species multiply. In 1987, we implemented crop rotation, scientific farming, seed selection, mechanical seedling raking, cultivating and weeding in a crop of 1260 mu of soybean fields in 6 and 11 teams, and weeding herbicides (team 6 with trifluralin Extinguishable grass fierce sowing before soil treatment, 11 teams with Dulga 2.4D-butyl for sowing after spraying before spraying the surface), combined with the latter part of the artificial net "net weed measures, received a good herbicide Effect, so that a substantial increase in economic efficiency. Puyang farm 6 teams, integrated