Application of N, P, K fertilizer and boron and zinc fertilizer application in rapeseed--

1. Live broadcast: 20 kg of urea for N, P and K, 40 kg of superphosphate, 16 kg of potassium chloride, mixed application The content of 11% borax is 2 kg; the content of 19% zinc sulfate is 2 kg. The combination of zinc fertilizer and boron fertilizer has a certain effect on the growth of rapeseed.

2. Nursery: use seedbed bed to spread, cultivate strong seedlings and transplant soil with large fields. Autumn sowing generally sown seedlings on September 10-20. Transplanted before October 20, the row spacing is 4m, the plant spacing is 2m, and each nest is single. It is suitable to plant 8000--13,000 plants per mu. Use phosphorus, potassium, boron, zinc fertilizer as the base fertilizer, and topdressing seedling period 10—15 kg/mu. The opening period or the twitch period is 20--25 kg/mu.