Fertilizer requirements: For every 1,000 kilograms of garlic produced, it needs to absorb 5.1 kilograms of nitrogen, 1.3 kilograms of phosphorus, and 1.8 kilograms of potassium. The ratio of nutrient absorption is 3.92:1:1.38.
Basal garlic has a shallow root system, few root hairs, and weak ability to absorb nutrients, which requires high quality of base fertilizer. Prior to application, the organic fertilizer should be thoroughly cooked and then chopped and mixed in order to prevent unripe raw manure from causing damage to garlic sprouts. Common farmyard manure is manure, pig manure, chicken, duck manure, and cake manure. In general, 2500-3000 kg of pig manure is applied per mu. Fertilizers used as base fertilizer, ammonium sulfate per acre 30 ~ 35 kg, or urea 10 ~ 15 kg, the fertilizer applied to the ditch, and then covered with soil. Acidic soils in the south can be added with appropriate amount of lime in the base fertilizer.
Topdressing sowing autumn garlic, in the seedling stage, before the winter before the top dressing, the application of fertilizer can use human waste or chemical fertilizers. In general, the amount of human fecal urine used per acre is 1,000-2,500 kg, or 15-20 kg of ammonium sulfate, or 7-9 kg of urea, followed by water. If garlic seedlings grow vigorously, they may not be top-dressed to prevent over-expansion of seedlings before winter. When covering the winter wheat straw or straw, spreading soil miscellaneous fertilizer, pond mud, etc., apply 5000-7000 kg per acre, can make the second year of plant convulsions early, large garlic, garlic weight. After the temperature rises in the spring, in order to meet the demand for nutrient in the spring period, it is necessary to topdress the spring fertilizer in a timely manner and human urine or fertilizer can be applied. At the time of convulsions, 20 to 25 kg of ammonium sulfate or 9 to 12 kg of urea is applied per acre. One month after the application of pumping manure, the scale buds of garlic enter a vigorous growth stage and require a large amount of nutrients. At this time, it is necessary to top-up a quick-acting fertilizer, and 3,000 to 4,500 kilograms of pig manure may be applied per acre, or ammonium sulfate 18 ~20 kg, or 8 to 10 kg of urea, can promote early bolting of garlic and improve the yield and quality of garlic bulbs and garlic bulbs. When fertilizing garlic, it is necessary to pay attention to two key periods of fertilization. One is to revive seedling fertilizer to promote the growth of garlic leaves, and the other is to promote head fertilizer to promote the expansion of garlic bulbs.
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