What should be paid attention to in the spring fertilization of rapeseed? The growth period of rapeseed is long and the amount of fertilizer needed is large. The fertilizer required is 3.0-3.5 times higher than that of gramineous crops. The critical period of rapeseed nutrition is in the seedling stage, and the maximum efficiency of fertilizer is in the flowering stage. The demand for nitrogen fertilizer in rapeseed is higher than that of potassium fertilizer. The demand for potassium fertilizer is more than that of phosphorus fertilizer. The application amount of rapeseed base fertilizer It accounts for 60% of the total fertilization amount, and topdressing accounts for 40% of the total fertilization.
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