Use rape without a trace before sowing.

20% grams of water-free agent is a contact-killing herbicide. Spraying Ke after no-tillage direct seeding or transplanting rape during harvest and stubble of rice, cotton and other crops can improve soil fertility, improve soil structure, increase permeability, preserve fertilizer and water, and save labor and cost compared with ploughing and planting rape. Especially in the case of a large reduction of labor in rural areas and prominent seasonal contradictions, this method can be sown at agricultural time. If glyphosate and other internal inhalation herbicides are applied before sowing, rape can not be sown until 5-7 days after application, otherwise it will seriously affect the turning green of rapeseed, lengthen the slow seedling stage, and it is difficult to achieve strong seedlings overwintering; however, rape can be sowed and planted after 4 hours without trace, and it does not have any adverse effect on rape seedlings. Glyphosate needs to be re-applied in case of rain within 8 hours after application. No-tillage direct seeding rape can adopt the method of killing first and then sealing and blocking. Kill first and seal later. After the previous harvest, using 20% grams of water-free agent 150-200 ml per mu and adding 50-60 kg of water spray can kill all weeds and play the role of cleaning up the previous crop. Rapeseed could be sowed on the second day after application, and then herbicides such as paraquat, Duer, Hornes, Acetochlor, butachlor and other herbicides were selected for soil closure treatment. Banning the union. After sowing and covering soil, rape was mixed with 20% grams of water-free agent 150-200 ml per mu and mixed with herbicides such as Duer, diachlor, Acetochlor, butachlor and other herbicides to save labor and time. After no-tillage transplanting rape, rice, cotton and other crops, 20% g water-free agent 150ml / mu was added with water spray to kill weeds, and rape was transplanted the next day after application. After rape transplanting, herbicides such as diachlor, Acetochlor and Acetochlor were selected for soil treatment, or mixed with Guangjiaan, banned and applied once, and then transplant rape the second day after application.