During the period from the beginning of autumn to Bailu, the principle of watering is “light pouring, morning and evening pouringâ€, combining watering to attack leaf fertilizer, applying 1500-2000 kg of farmyard manure per mu, 20-25 kg of superphosphate, and potassium sulfate. 10 kg, promote the rapid development of leaf.
After the White Dew Festival, the weather was cool, and the temperature difference between day and night was increased. The green onions entered the vigorous growth period of scallions, which was a critical period for the formation of scallion production, and was also a critical period for fertilizer and water management. It should be combined with watering to top-up “attacking tree-fertilizer†twice. Each mus of 15-20 kilograms of urea, potassium sulfate 10-15 kilograms, topdressing between rows, shallow water after cultivating. The principle of watering is "diligence, heavy pouring," and the soil is often kept moist to meet the need for light green growth.
After the frost falls, the weather is getting cooler and cooler, the growth of the leaves is becoming slower, and the transpiration of the leaf surface is reduced. Watering should be gradually reduced, and watering should be stopped 5-7 days before harvest, which is conducive to harvesting and transportation.
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