Potato Fertilization Technology
The fertilization technology of potatoes should follow the principle of farmyard fertilizers, supplemented by chemical fertilizers, basal fertilizers, and top dressing.
Reapply base fertilizer. Potatoes are tuber crops. They like loose sandy soil and require a cool climate. The amount of basal fertilizer generally accounts for more than two-thirds of the total amount of fertilizer. Basal fertilizers are mainly mature farmyard fertilizers, and a certain amount of chemical fertilizers, especially phospho-potassium fertilizers, are used as base fertilizers, which can improve the physical properties of the soil and are conducive to growth and growth. Potatoes. The amount of nitrogen fertilizer used in basal fertilizer accounts for about 50%. The application method of basal fertilizer is to apply furrows or acupuncture points before planting, which is about 15 cm deep. The specific fertilization amount is about 1500 kilograms of land per mu, and 1500-2500 kg of organic fertilizer, 20 kg of urea, 20-30 kg of calcium, 10-12 kg of potassium fertilizer, or high nitrogen and potassium fertilizer are applied per acre. 40-60 kilograms, the amount of fertilization in high-yield areas can be appropriately increased. Fertilizers should be applied at 2-3 cm from the seed potatoes to avoid direct contact with seed potatoes and cover soil after fertilization.
Fertilize early. Fertilizers should be used in conjunction with the potato growth period. During the seedling period, topdressing nitrogen fertilizers can be used to combine cultivating soil with 5-7 kg of urea per acre to pour water, which is beneficial to keeping seedlings. After the potato blossoms, it is generally not applied to the rhizosphere topdressing, in particular nitrogen fertilizer cannot be topdressed. After the potato blossoms, the leaves are mainly sprayed with phosphorus and potassium fertilizers, and 0.3%-0.5% of potassium dihydrogen phosphate solution is sprayed per acre. Kg, if there is a shortage of nitrogen, it can increase 100-150 grams of urea, spray once every 10-15 days, and spray 2-3 times. Potatoes are more sensitive to boron and zinc. If the soil is deficient in boron or lacks zinc, it can be sprayed with 0.1%-0.3% borax or zinc sulfate. It is usually sprayed every 7 days and sprayed twice per acre. 50-70 kg can be. In particular, farmers should be reminded that potato is a high-potassium crop, and potassium fertilization should be given special attention in balanced fertilization. At the same time, it is not appropriate to use excessive chlorine-containing fertilizers, such as potassium chloride, potassium sulfate should be used, otherwise it will affect the quality of potatoes.
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