Rape field management points
1, suitable time seedlings. The seedling is an important measure to control the density and ensure the seedlings to grow. Generally, during the three-leaf period, the principle of seedlings is that the inter-mammity is weak, the inter-disease is mixed, the inter-dense is inferior, and the stubborn and stubborn seedlings remain. The five-leaf stage is based on the planned density. 2, cultivating and weeding. In the seedling stage, the combination of the seedlings and the seedlings in time for cultivating and weeding can also carry out chemical weeding. 3. Timely irrigation and drainage. According to the water requirement law and water conservancy of crop growth, water is separately planted in the bud stage, flowering stage and green stage. The requirement is to speed up the speed row and reduce the lodging. 4. Scientific fertilization. The ratio of NPK absorption in rapeseed is generally 1:0.39:0.95. The combined effect of the three elements is to exert a combination of the three factors of soil state, water supply, soil, water and fertilizer under the combined influence of cultivation conditions. effect. (1) Applying the base fertilizer, adding organic fertilizer, more than 1000kg of farmyard manure, 3-5kg of compound fertilizer for seed fertilizer, and not promoting urea as seed fertilizer. (2) Applying five-leaf fertilizer early, apply 20-30kg of urea per acre or 30-40kg of ammonium bicarbonate for water application. Fertilization is very important at this time. (3) skillfully apply fertilizer, pay attention to micro-fertilizer. The moss fertilizer should be applied at a height of about 10 cm of the moss and 15-20 kg per acre of urea. Spraying boron fertilizer and potassium dihydrogen phosphate at the flowering stage. 5. Pest control. The rapeseed is most vulnerable to leaf bees, armor and cabbage caterpillars after emergence. The main locust is the locust after the bud. The use of high efficiency, low toxicity and low residue pesticides is an effective means of prevention and control. The main diseases are cruciferous root disease, rape white rust, downy mildew, viral disease, sclerotinia.
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