With the adjustment of the planting structure, more and more farmers are planting potatoes. However, due to the impact of traditional fertilization, only fertilizer and diammonium are used as the bottom fertilizer on potato fertilization, and no top dressing is used. The average amount of fertilizer used by a potato is (pure) 10 kg / mu nitrogen, 5 kg / mu phosphorus, 5 kg / mu potassium, which translates to 300 kg of urea, 150 kg of 64% diammonium, and 50% potassium sulfate. 150 kg. To obtain high-quality and high-yield potatoes, the following fertilizers should be used as fertilizers in the planting process:
1. Base fertilizer. The base fertilizer is applied with high-quality farm manure combined with chemical fertilizer. All the farm manure and phosphate fertilizer, 50% nitrogen fertilizer, and 70% potassium fertilizer are used as the base fertilizer. The method of fertilization is furrow or hole application before planting, and the fertilization depth is 15 cm.
2. Topdressing. Topdressing twice:
â‘ Fertilizer protection is carried out after the seedlings are promoted to promote the growth of stems and leaves. The amount of fertilizer applied is 2/3 of the remaining nitrogen fertilizer. The method of fertilization is to apply water to the remaining plants.
â‘¡ Promote potato fertilizer before the plant is planted and at the stage of potato setting. The dosage is: 1/3 nitrogen fertilizer and 30% potassium fertilizer. Fertilization method: Strip application or hole application, 10 cm in depth to prevent fertilizer loss.
Potatoes are more sensitive to zinc and boron fertilizers. Foliar spraying can be used to apply zinc and boron fertilizers. 50-70 kg of fertilizer solution per mu can be sprayed every 7 days and sprayed 2-3 times.
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