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What fertilizer is good for leeks?
In the year of planting leek with fertilization technology, deep ploughing and sufficient base fertilizer are the basic guarantee for continuous high yield of leek in successive years. Generally, deep ploughing and deep ploughing are combined before planting, and 3000 ~ 5000 kilograms of decomposed organic fertilizer can be applied per mu, and about 50 kilograms of potassium sulfate compound fertilizer can be applied. Topdressing: When the plant height of leek is 5cm and 10cm, it should be topdressed twice with water, and each topdressing is about 10 kg of high-nitrogen compound fertilizer. After entering the vigorous growth period, it is necessary to strengthen the management of fertilizer and water, and generally apply about 20 kilograms of potassium sulfate compound fertilizer per mu. In the spring of the second year of planting, when the soil thaws above 10cm, loosen the soil to keep moisture and increase temperature, and promote growth. Combined with watering, topdressing compound fertilizer 15 ~ 20 kg/mu. After each harvest, hoe the surrounding soil. After 2-3 days, the leek wound will heal, and when new leaves are about to grow, water and topdressing will be carried out. General compound fertilizer is about 20 kg per mu. When rooting in summer, apply fertilizer twice every 4 ~ 5 months. The first application of high nitrogen compound fertilizer per mu 15 ~ 20kg, and the second application of high nitrogen and potassium compound fertilizer per mu15kg or so. Autumn is the main period for leek to accumulate nutrients, so it is necessary to strengthen fertilizer and water management, reduce harvest times or stop harvesting. Generally, after beginning of autumn, the application of compound fertilizer is about15kg per mu.