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我国大豆田杂草种类有70～80种,能造成草荒的有20～30种,只要掌握杂草的种类和特点,有效运用各种技术防治杂草,就会收到很好的效果。大豆从播种到封行约需30～40天,播种后5～15天是杂草出苗高峰,90%以上的杂草在25天内出土。利用杂草这一特点播种期施药消灭杂草、待大豆封行后以密控草。还可利用农业措施和大豆生长期茎叶处理消灭杂草。措施如下:
There are 70-80 kinds of weeds in soybean field in our country, which can cause 20-30 species of grassland shortage. As long as we grasp the types and characteristics of weeds and effectively use various techniques to control weeds, we will receive good results. Soybean from sowing to seal about 30 to 40 days, sowing 5 to 15 days after weeding peak, 90% of the weeds unearthed within 25 days. The use of weeds characteristics of sowing to eliminate weeds, until the soybean seal line to close grass. Weeds can also be eliminated using agricultural practices and stem and leaf treatments during the soybean growing season. The measures are as follows: