Effect of phosphorus on double-low rapeseed

Rapeseed is the most sensitive to phosphorus at the initial stage of growth, and phosphorus can be reused in crops, so all the phosphate fertilizer of rapeseed should be used as base fertilizer. The period from flowering to maturity is the period when rape absorbs the most phosphorus, accounting for 58.2% of the total. After maturity, 60 to 70% of the phosphorus is distributed in the grain. Phosphate fertilizer can increase the oil content of seeds, but the oil content of seedling stage combined with nitrogen and phosphorus application is less than that after bolting. The application of phosphorus, linolenic acid and eicosenoic acid in winter rape increased, while erucic acid decreased significantly.