在冬末春初的低温时节,为了使蔬菜提早上市卖个好的价钱,近些年来常采用覆盖地膜的方法增温、保温、保墒、保肥来促进蔬菜早熟增产,同时,应用除草剂除草,兼收了省工栽培增效的作用。但是,多年膜内化学除草的经验教训告诉我们,如果选用的除草剂品种不当,或者施用方法有误,一会使杂草不能根除,二会使蔬菜产生药害,三会污染环境,四会降低蔬菜的市场价值。为了充分发挥除草剂的效果,现 In the late winter and early spring low season, in order to make the vegetable market early to sell a good price, in recent years often used to cover the film method of warming, heat preservation, preserving soil and fertilizer to promote early maturity of vegetables, while the application of herbicides weeding, Both the effect of provincial labor cultivation efficiency. However, the many years of experience in membrane chemical weeding have taught us that if we choose the wrong type of herbicide or the method of application is wrong, weeds can not be eradicated, the second will cause phytotoxicity on vegetables, three will pollute the environment, Reduce the market value of vegetables. In order to give full play to the effect of herbicides, now