Potatoes are hi potassium and magnesium crops, especially in the late growth stage. When the supply of potash fertilizer and magnesium fertilizer is sufficient, the number of tubers is large, the tubers are large, and the starch content is high.
Potassium Fertilizer and Magnesium Fertilizer Application Method: Apply Potash Fertilizer and Magnesium Fertilizer every 15-20 days in the middle and later stages of potato growth, apply 2-3 times in succession, applying 30-40 kg of potassium chloride per acre, magnesium sulfate 60-80 Kilograms, immersed in 50-60 kg of fresh water, or evenly spread potassium and magnesium fertilizers in the soil around the roots of potato plants, and then apply a layer of 8-10 cm thick soil to add potassium chloride and sulfuric acid. All magnesium can cover it.
In addition, spray 0.1% magnesium sulfate and 0.3% potassium dihydrogen phosphate solution once every 7-10 days, and spray 3-5 times in a row to evenly wet all stems and leaves to begin dropping drops of water. It is appropriate.
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