Generally suitable for planting cotton is also suitable for planting rape, and the high-yielding cotton area is also a high-yield area of ​​rapeseed. In previous years, seedling transplanting was widely promoted as a technical measure to promote early, steady, and high yield of rapeseed. However, in recent years, with the shift of rural young and middle-aged labor force, the area for transplanting seedlings has gradually narrowed, and the live area of ​​rapeseed has continued to expand. In order to solve the seasonal contradiction between cotton harvesting and rapeseed sowing, cotton fields and rapeseeds are often taken into account in cotton fields directly planted or set in rapeseed.
At present, the rapeseed is about to enter the season of sowing nursery or transplanting. This year, as the growth and development of cotton is delayed by 710 days compared with the normal year, the production should be completed as early as possible and the rapeseed season should not be missed.
Timely planting seedlings. Nowadays, cotton is more commonly used in transgenic hybrid insect-resistant cotton varieties. There are many varieties of rapeseed available. A few seedlings transplanted can be planted in the middle or late September and transplanted in mid-to-late October with good precocity, more branches, and tolerance to drought. Anti-lodging double-low rapeseed varieties are suitable; a large number of live seeds can be sown in mid-late October, generally ending before October 25, try to use early ripening and late sowing, high germination rate, fast spring, long main inflorescence, strains Compact, drought-resistant double-low rapeseed varieties.
Scientific formula fertilization. Prepare sowing (planting) rapeseed cotton fields, late should not apply excessive nitrogen fertilizer to prevent late-maturing. Generally, the application ratio of nitrogen, phosphorus and potassium fertilizers is 1:0.5:0.8. In the mastery of the amount, in the base fertilizer, 60% of the total amount of applied nitrogen, 70% of the total amount of potassium, phosphorus and boron, zinc are all applied as base fertilizer. Better fertility cotton fields, 40 yuan per mu compound fertilizer is used as base fertilizer, fertility is poor, the application of 50 yuan per mu compound fertilizer 50 basal. Where conditions permit, apply 1500-2000 kg of organic fertilizer, 0.51 kg of borax, or 0.2-0.5 kg of boron and 0.5 kg of zinc fertilizer.
Pay attention to complete supporting measures. One is the amount of 200-250 grams of seed per acre for live broadcast, and the appropriate increase in seeding time for the sowing date; the second is the density of seedlings, live-planted 13000-15000 strains, transplanted 8000-10000 strains; and the third is in late November. To remove cotton stalks for field management of rapeseed; Fourth, to clear up the "four ditch" (car channel, waist ditch, gutters and drainage ditch), to promote hair root hair; Fifth, in the prevention and control of pests, the key prevention Sclerotinia.
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