Fertilization principles: 1, re-application of organic fertilizer, fertility. 2. Rationally cooperate with nitrogen, phosphorus and potassium to properly supplement medium and trace elements. 3. Strengthen the management of topdressing after the rose seat period.
Fertilization recommendation: Before planting Chinese cabbage, according to the fertility of the soil, apply 2~3 square organic fertilizer per acre. Under the condition of 5000 kilograms of net vegetables per mu, it is recommended to apply 20~25 kg/mu of nitrogen fertilizer, 5~8 kg/mu of phosphate fertilizer and 25~30 kg/mu of potash fertilizer. The amount of the slimming material can be appropriately increased according to the level of the production level.
Fertilizer operation: Phosphate fertilizer is used as base fertilizer, 30% nitrogen fertilizer is used as base fertilizer, 70% is applied as top dressing; 50% potassium fertilizer is used as base fertilizer, and 50% is used as top dressing. Nitrogen and potassium topdressing can be applied 2 to 3 times after the rosette period.
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