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1981年黑龙江省垦区农场大豆田使用土壤处理除草剂除草面积为47.6万公顷,占大豆播种面积的73％。1982年后,大豆苗后除草剂的应用增长速度超过土壤处理除草剂。1983～1986年,仅拿捕净、稳杀得和杂草焚三种苗后除草剂的使用近1500余吨,除草面积达98.8万多公顷;而这四年中大豆田使用土壤处理除草剂氟乐灵的数量逐年下降。苗后除草剂使用简便,除草效果好,除草面积不断扩大。苗后除草剂的优越性:杂草出苗后,根据草情
In 1981, Heilongjiang Land Reclamation Farm soybeans use soil treatment herbicide weeding area of 476,000 hectares, accounting for 73% of soybean acreage. After 1982, the application of soybean seedling herbicides increased faster than that of soil treatment herbicides. From 1983 to 1986, only about 1,500 tons of herbicides were used for the three kinds of post-emergence herbicides, of which 988,000 hectares were used for grazing. In the past four years, soybean fields were treated with herbicides, The number of spiritual decline year by year. Post-emergence herbicides easy to use, weeding effect, weeding area continues to expand. Advantages of post-emergence herbicide: weed emergence, according to the grass