苜蓿的杂草防除是草地生产上亟待解决的重要问题之一。我国北方夏季高温、多雨,苜蓿刈割后杂草生长极为迅速,因此,后期的苜蓿地杂草随着刈割次数的增加而增多,并由此使老苜蓿地比新苜蓿地杂草多,许多2—4年生的正在生产高峰时期的苜蓿地因杂草太多不得不翻耕。由于苜蓿本身也是双子叶植物,使用除莠剂除草有许多困难。本文报导的苜蓿地用百草枯除草法简单易行,使用的器械、药品都不难解决,值得有关生产和科研部门参考、试用。 Alfalfa weed control is one of the most important problems to be solved urgently in grassland production. In northern China, the weeds were extremely hot and rainy in summer, and weed growth was extremely rapid after alfalfa mowing. Therefore, the weeds in alfalfa fields increased with the increase of mowing times in the later period, and the old weeds had more weeds than the new alfalfa fields. Many 2-4-year-old alfalfa crops under peak production have to be tilled too much because of the weeds. Since alfalfa itself is also a dicotyledon, there are many difficulties with weeding herbicides. This article reported alfalfa paraquat weeding method is simple and easy to use, the use of equipment, medicines are not difficult to solve, it is worth the production and scientific research department reference, trial.