板田油菜杂草种类多,主要杂草有看麦娘、通泉草和繁缕等,占总杂草量的80%以上,而且大多数丘块杂草危害严重。针对板田油菜杂草发生特点,湖南省醴陵市农业局近年来改进除草技术,各种杂草的总防效稳定在93.8%以上。做法如下:晚稻收获前5～7天,田间灌3厘米深的浅水层,每亩均匀撒施 There are many kinds of weed rape in weed field. The main weeds are Anemarrhena, Tung Chung, and chickweed, which account for more than 80% of the total weeds, and most of the weeds are severely endangered. In response to the occurrence of weed rape in Banten, Liling City, Hunan Province Bureau of Agriculture in recent years to improve weeding technology, the overall control of various weeds in the stability of more than 93.8%. Practices are as follows: 5 to 7 days before harvest of late rice, field irrigation 3 cm deep shallow layer of water evenly spread