Rape application n, p, k fertilizer and with boron, zinc fertilizer application method - 1. Live: Mushi base fertilizer n, p, k with urea 20 kg, superphosphate 40 kg, potassium chloride 16 kg, mixed application content 11% of borax 2 kg; content of 19% zinc sulfate 2 kg is appropriate. The combined application of zinc fertilizer and boron fertilizer exerts certain interaction effects on rapeseed production. 2. Seedlings: seedbed thin sowing, seedling cultivation with soil transplanting field. Autumn sowing is generally planted on September 10-20. Transplanted before October 20, row spacing 4m, plant spacing 2m, single plant per litter. Mu planting 8000 - 13000 strains is appropriate. The use of phosphorus, potassium, boron, zinc fertilizer as a base fertilizer, dressing fertilizer seedlings 10 - 15 kg / acre. Opening period or convulsing period 20 - 25 kg / acre. 3. Seedling period: The experiment showed that the absorption of boron and zinc in rape was the highest at the flowering and maturing stages, and it could be sprayed at the seedling, flood or early flowering stage with 0.1%——0.25%, 1———2. In order to prevent flowering from happening, it promotes stable growth, and at the same time, the production of boron and zinc is higher. The accumulation of zinc in the rapeseed and seedling stages accounted for about 30% of the total growth period, and 40% of the total flowering and maturation period. The use of boron and zinc fertilizer in rapeseed could resist or reduce the occurrence of Sclerotinia.
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