为了解决中、晚稻秧苗难扯问题,1978年我们在中稻秧田做了个喷施20％二甲四氯的试验,每亩用量2.5—4两,加水100斤,用喷雾器均匀喷在秧苗上。喷药前放干秧田水,喷药后24小时再灌水,以栽培管理条件相同的不喷药秧田作对照。从初步试验结果看,秧苗喷二甲四氯有如下好处:①除草。二甲四氯是水田除草剂,对双子叶杂草有良好的杀灭作用,对牛毛毡等单子叶杂草也有抑制作用。②好扯秧。据观察,喷药后3天,秧苗基本变脆、易扯断;喷药后6天根 In order to solve the late rice seedling difficult problem, in 1978 we made a 20% spraying of rice in the rice seedling test, the amount of 2.5-4 per acre two, add water 100 pounds, evenly sprayed on the seedlings with a sprayer. Drying before spraying put dry water, spraying after 24 hours of irrigation, to cultivate the same management conditions are not spraying seedling control. From the preliminary test results, seedlings spiked MCPA has the following benefits: ① weeding. MCPA is a paddy field herbicide that has a good killing effect on dicotyledonous weeds and inhibits monocotyledonous weeds such as bovine felts. ② good pull rice. It is observed that 3 days after spraying, seedlings basically become brittle, easy to break; 6 days after spraying root