一、除草问题水稻旱种有一个苗期旱长阶段,三、四叶期之前约30至40天不需要灌溉。这时杂草极易生长,能否有效的防除杂草,关系到水稻旱种成败。两年来,我们在水稻早种除草试验中,采用了药物除草和人工除草相结合的办法,效果较好。这里主要谈一下药剂除草问题。目前我国新型除草剂种类较多。我们常采用的有三种:(1) 50％的杀草丹乳剂,它是一种选择 First, the weeding problem Rice dry seedlings have a long drought stage, about three to four leaves before about 30 to 40 days without irrigation. At this time weeds are very easy to grow, can effectively control weeds, related to the success or failure of rice dry farming. In the past two years, we used the method of combination of herbicide and artificial weeding in the experiment of early weeding in rice. Here mainly talk about drug weeding. At present, there are more types of new herbicides in our country. We often use the three kinds: (1) 50% of herbicide Dan emulsion, it is an option