First, the need for fertilizer characteristics
Amaranth is a perennial vegetable with strong adaptability to the soil. It is suitable for loam and sandy loam, and the leek needs a large amount of fertilizer. Annual amaranth, the plant is not yet fully developed, and the amount of fertilizer is small; 2 to 4 years of raw amaranth, the strongest tiller, the highest yield, the amount of fertilizer should be increased accordingly; more than 5 years of amaranth, due to many years of harvest, soil fertility and plants The growth has declined, and organic fertilizers need to be added to increase soil fertility and prevent premature aging. In addition to a large number of elements, amaranth has a volatile odor component that contains sulfur, which is a sulfur-loving crop.
Second, fertilization technology
1. The year of colonization
1 Applying the base fertilizer: Before planting, deep-turning the soil and applying the base fertilizer is the basic guarantee for the continuous high yield of leek in the year. Generally, it is combined with deep-turning the whole land before planting, and the organic fertilizer is 3,000-5000 kg per mu, and the general-purpose sulfur-based compound fertilizer 50 About kilograms.
2 Top dressing: When the plant height of the leek is 5cm and 10cm, it is combined with watering and topdressing twice, each time applying high-nitrogen compound fertilizer about 10 kg. After entering the prosperous growth period, the management of fertilizer and water should be strengthened. Generally, about 20 kg of sulfur-based compound fertilizer is applied per mu.
2, the second year of planting
1 Spring: When the temperature rises in spring, the amaranth begins to return to green. The dead leaves and leaves on the ground should be removed in time. When the soil is frozen more than 10cm, the soil will be warmed up to promote growth, and 15-20 kg of compound fertilizer will be applied per acre combined with watering. After each harvest in the harvesting period, the soil around the pine is loosened. After 2 to 3 days, the leek wounds heal. When the new leaves are out, watering and topdressing are carried out. Generally, about 20 kg of compound fertilizer is applied per mu.
2 Summer: After entering the rooting period, the spring leeks should be fertilized twice in 4 to 5 months. For the first time, the high-nitrogen compound fertilizer was 15-20 kg, and the second mu was about 15 kg of high-nitrogen potassium compound fertilizer.
3 Autumn: Autumn is the main period for the accumulation of nutrients in amaranth. It is necessary to strengthen the fertilizer and water, reduce the number of harvesting, or no longer harvest. Generally, after the beginning of autumn, about 15 kg of compound fertilizer is applied per mu.
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