Correct Application of phosphorus Nutrition in rapeseed

Although rape needs less phosphate fertilizer than nitrogen and potassium, rapeseed is very sensitive to phosphorus. The yield of Brassica napus is 100 to 150 kg per mu, and the absorption of phosphorus in the whole life is the highest at bolting stage. The efficient period of using phosphorus in rapeseed is much earlier than that of absorbing phosphorus. Therefore, phosphate fertilizer should be used as seed fertilizer and base fertilizer, such as topdressing, it is better to apply it before the 5-leaf stage.