Fertilization methods for high yield of rapeseed

1. Early application of seedling fertilizer in late November or early December, mainly organic fertilizer, 1500kg to 2000kg per mu, and appropriate combination of chemical fertilizer for some fields with poor growth. Second, the suitable application of bud bolting fertilizer should be carried out when the bolting length of the main stem is 10 cm, and the field with good seedling potential in the early stage can be slightly delayed. The application amount is generally 20% of the total amount of fertilizer application, but the one with good fertility should be less than 20%, and the thin field can be more than 20%. Fertilizer is mainly organic fertilizer, combined with compound fertilizer. Partial application of nitrogen fertilizer or late or excessive application of nitrogen fertilizer can easily lead to disease, cause overgrowth, lodging and reduce yield. At this time, rape is small, fertilizing beside the root of rape is beneficial to operation, and chemical fertilizer will not be sprinkled on the seedlings. Covering the dug soil on the chemical fertilizer can play the role of deep application. 1500 kg of organic fertilizer, 20 kg of rape special fertilizer or 10 kg of urea per mu.