How to apply base fertilizer to rape reasonably?

How to apply base fertilizer to rape reasonably? Please introduce the law that rapeseed needs fertilizer to produce 100 kg rapeseed requires 8.8-11.3 kg of nitrogen, 1.3-1.7 kg of phosphorus and 7.1-10.5 kg of potassium. At a certain production level, the need for nitrogen, phosphorus and potassium in rape is 3 times higher than that in rice, wheat and corn (2349, 8.00,0.34%) to produce products of the same weight. The demand of rape for available boron in soil is about 5 times higher than that of other crops, so special attention should be paid to the application of boron fertilizer in production. Base fertilizer should be based on organic fertilizer and insoluble mineral phosphate fertilizer, combined with a small amount of nitrogen fertilizer. Organic fertilizer is mainly livestock manure, soil fertilizer, pond mud, cake fertilizer and so on. The amount of fertilizer depends on the quality of fertilizer, generally 3000kg / mu, while applying 5000kg / mu of nitrogen fertilizer (11kg of urea or 25kg of ammonium sulfate), 20kg of calcium superphosphate and 5kg of potassium chloride. In sulfur deficient soil, the application of 20,30kg superphosphate or 2kg sulfur powder per mu as base fertilizer can prevent rape from sulfur deficiency. In the soil with serious boron deficiency, 0.5 kg of borax should also be added as base fertilizer (if the soil is seriously deficient in zinc, 1 kg of zinc sulfate can be added as base fertilizer). The main kind of fertilizer should be phosphorus and potash, and calcium superphosphate, potassium sulfate, soil manure, slag fertilizer, plant ash and so on are widely used in production, as well as livestock manure and human feces and urine. When calcium superphosphate is used as seed fertilizer alone, fine soil should be mixed and then mixed with seeds. When sowing by machine, it should be made into granular fertilizer, or N-P, N-P-K, P-K compound granular fertilizer. If the soil with serious boron deficiency does not apply boron fertilizer as base fertilizer, 0.5 kg borax or boric acid can be added as seed fertilizer per mu. Transplanting rape seedbed fertilizing and applying sufficient base fertilizer. Generally, the structure of thin land, paddy soil, clay and sandy soil is poor, so more fertilizer should be applied properly. 2000kg of human and animal manure per mu of seedling bed should be used as surface fertilizer, combined with soil preparation and applied to topsoil layer. In some high-yield rape areas, 25kg superphosphate and 5kg potassium chloride per mu were used to spread soil before sowing, mixed with topsoil, and then sprinkled with 1500kg / mu of high-quality cow dung with dregs of 2000kg / mu after sowing to make the seedling bed fully moist. If the soil is fertile and the organic matter is sufficient, the amount of fertilizer used can be reduced appropriately. Topdressing at seedling stage. Miaoqi topdressing can be combined with inter-seedlings, according to the growth of seedlings, generally use 500 kilograms of mature human and animal manure per mu, the amount of water depends on soil moisture. If the seedling potential is poor, 5kg ammonium sulfate or 6kg ammonium bicarbonate per mu can be applied twice. No topdressing after the five-leaf stage. About 7 days before transplanting and pulling seedlings, "stand-up fertilizer" or "marriage fertilizer" was applied again, adding 8kg ammonium bicarbonate per mu in addition to human and animal manure per mu to promote the seedlings to produce more new roots. During drought, watering every 2-3 days can increase the ability of drought resistance. Click to get more rape planting techniques click to get more food crop planting techniques