We must strengthen fertilizer and water control, cultivate strong seedlings and ensure safe wintering. According to the growth characteristics of rapeseed and the characteristics of required fertilizer, basal fertilizer, scientific fertilizer and boron fertilizer should be reused, and the special sustained release fertilizer for rapeseed should be recommended. For transplanting rape, pure nitrogen (N) 10-12 kg, phosphorus (P2O5) 3-4 kg, potassium (K2O) 3-5 kg, and borax 0.75 kg can be applied per acre; 60% of nitrogen fertilizer, 60% of potassium fertilizer, and total boron are used. Fertilizer is applied as basal fertilizer, other 20%-30% nitrogen fertilizer is used for wintering seedling fertilizer, and 10%-20% nitrogen fertilizer and 40% potassium fertilizer are used as fertilizer. Live rape can be applied with 9-11 kg of pure nitrogen (N), 3-4 kg of phosphorus (P2O5), 4-5 kg ​​of potassium (K2O) and 0.75 kg of borax per hectare, of which 50% of nitrogen fertilizer is used as base fertilizer and 20% is used for raising seedlings. Fertilizer, 20% for winter seedlings, 10% for manure; potash 80% for base fertilizer, 20% for winter seedlings; phosphate fertilizer and boron fertilizer as base fertilizer. Overgrown rape can use 30-40 grams of 15% paclobutrazol per acre to spray water and prosper 40 kg to increase the ability of rapeseed to withstand freezing.
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