Use organic fertilizer as base fertilizer. Use commercial organic fertilizer as base fertilizer. For example, ordinary farm manure must be composted at high temperature to kill grass seeds and pathogenic bacteria. If possible, the compost can be aged for 1-2 months; the chemical fertilizer used in base fertilizer should be Keep a distance of 3-5 cm from seed potatoes to avoid affecting the germination and emergence of seed potatoes.

It is not advisable to apply too much chlorine-containing fertilizers. Potatoes should not apply too much chlorine-containing fertilizers. When the current concentration reaches a certain level, it will be toxic to the plant roots. It can reduce the content of starch and sugar in the product and affect the yield and quality. It will also cause the crop to die, so use ammonium chloride, potassium chloride and other fertilizers with caution.

Control the timing and amount of foliar fertilization. When spraying trace elements, organic nutrient foliar fertilizer or paclobutrazol, it is better to spray before 10 am or after 3 pm. The effect of spraying trace elements and organic nutrient foliar fertilizer is better. The leaf surface and the back of the leaf should be moist. If it rains within 6 hours, it should be sprayed; and the paclobutrazol growth regulator should be moist on the leaf surface. Do not spray too much on the ground due to improper operation, which will cause the stem and leaf above the ground , Affecting yield and quality.

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