Green onion fertilization technology

After the planting site is selected, the base fertilizer should be applied, mainly with decomposed or semi-fermented organic fertilizer. Generally, the quality of the composted manure is 5,000-8,000 kg per 667 square meters of vegetable field. The soil containing less phosphorus is applied with 25 kg of calcium phosphate, 150 kg of ash or 8 to 10 kg of potassium sulfate per 667 square meters.
After planting, the onion seedlings grow slowly. When the rainy season is passed, the weather gradually turns cold. The onion plants enter a vigorous growth period, and the old leaves gradually turn yellow, and new leaves continue to occur. With good nutritional status and dark conditions, it can promote the growth of multiple leaves and sheaths. Immediately after the fall, the fertilizer should be applied, and the application of organic fertilizer and quick-acting fertilizer should be mastered. For each topdressing, apply 4000kg of soil and fertilizer per 667 square meters on the back of the ridge, or apply 150kg of cake fertilizer or 3000kg of wormhole soil. Immediately after application, it will be shallowed once and watered once. After about 15 days, chase the second fat, apply 750kg of human excrement, or apply 100kg of ash, 30kg of humic acid, and 30kg of superphosphate. After fertilization, combine with deep sputum to cultivate the soil and then water it. After another 25 to 30 days, the third top dressing will be applied. Each 667 square meters will be applied with 15 to 25 kg of nitrogen fertilizer. After topdressing, watering and soiling will be carried out. At this time, the scallion will quickly gain weight and be enriched until harvest. If the soil fertility is high and the base fertilizer is sufficient, the first top dressing may not be performed. In areas with short growth periods and good soil fertility, the third top dressing can be avoided.
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