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Control the application of nitrogen fertilizer, if the sowing date is appropriate, the fertilizer is sufficient, and the application of nitrogen fertilizer should be properly controlled before wintering to prevent the damage of the dry matter and sugar accumulation of the seedlings. If the planting is too late or the soil is insufficient, consider applying nitrogen fertilizer to promote the growth of the seedlings to ensure that the spinach will survive the appropriate seedling age.
After returning to management, the key to management is to seize the opportunity of topdressing. Spinach topdressing is carried out with irrigation. After returning to green, the topdressing will reduce the soil temperature and slow down the seedling growth and growth; the topdressing will delay the growth of spinach. Wintering spinach is generally suitable for two times in the middle and late March and early April. The topdressing is mainly based on organic fertilizer such as compound fertilizer or foliar fertilizer plus photosynthetic nutrient film fertilizer.
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Applying the base fertilizer, the wintering spinach has a longer growth period and the base fertilizer must be sufficient. Generally, the organic fertilizer and all the phosphorus and potassium fertilizers to be applied are applied as a base fertilizer, and then the soil is used as a base.
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