1生产中存在的问题1.1除草效果不稳定(1)对杂草不能完全封闭,由于杂草种子深浅不一,出土时间不一致,用药后仍有大量杂草出土,仅能达到生长缓慢的程度,经过一段时间后,仍可造成草荒。(2)对恶性杂草(苣买菜、刺菜、兰花菜、小根蒜)效果不好。由于这类杂草有的有地下匍匐茎,有的有根,而且芽眼多,很难达到防除效果。1.2对大豆的药害问题近几年即使对杂草防除效果不理想的情况下,对大豆仍可 1 problems in the production of 1.1 Herbicidal effect is not stable (1) can not be completely closed to weeds, as weeds seeds vary in depth, the unearthed time inconsistent, there is still a large number of weeds unearthed after treatment, only to slow the extent of growth, After a period of time, can still cause grassland shortage. (2) the bad weeds (Borage buy vegetables, pickled vegetables, orchids, small root garlic) is not effective. As some of these weeds underground stolons, and some have roots, but also many buds, it is difficult to achieve control effect. 1.2 on the issue of phytotoxicity Even in recent years, weed control effect is not ideal, the soybean can still