The study looked at how the timing and amount of nitrogen fertilizer affected oil and protein yield in high-quality hybrid rape plants. They found that using specific amounts of fertilizer at different times could maximize oil and protein production. For oil yield, using 8.0 kg/hm2 of living and opening fertilizer, along with 3.40 kg/667m2 of 12th lunar month fertilizer, gave the best results. For protein yield, using 8.0 kg/hm2 of living and opening fertilizer, and 7.90 kg/667m2 of 12th lunar month fertilizer was most effective. The total amount of nitrogen fertilizer needed varied between the two cultivars for maximum oil yield, but not for protein yield.