洋葱生长期长,叶片窄,杂草长期与洋葱争水、争光、争养分,使洋葱大量减产,商品性差。从1995年开始,我们在洋葱田进行化学除草技术研究。现介绍如下: 1.洋葱育苗田化学除草 洋葱种皮较坚实,需大量底水,才可促进出苗,这样也最有利于杂草的萌发生长,造成草 Onions grow long, narrow leaves, weeds and onions long dispute, glory, fight for nutrients, so that a large number of cut onion production, poor product. Since 1995, we have conducted chemical weeding research in onion fields. Are introduced as follows: 1. Onion nursery chemical weed onion seed coat more solid, requiring a large amount of bottom water, can promote emergence, it is also the most conducive to the growth of weeds, resulting in grass