How to fertilize Welsh onions well? Key points of fertilization methods for growing Welsh onions
How to fertilize Welsh onions well when growing them? Please allow me to explain: when growing Welsh onions, you can refer to the following methods for fertilization: when fertilizing and the plants' growth speeds up, apply a "leaf-promoting fertilizer" as a top dressing once, applying 1500-2000 kg of decomposed farmyard manure and 20-25 kg of superphosphate per mu. If the soil fertility is relatively high and the base fertilizer is sufficient, this...
How to fertilize Welsh onions well when growing them? Please allow me to explain
When growing Welsh onions, you can refer to the following methods for fertilization:
When fertilizing and the plants' growth speeds up, apply a "leaf-promoting fertilizer" as a top dressing once, applying 1500-2000 kg of decomposed farmyard manure and 20-25 kg of superphosphate per mu. If the soil fertility is relatively high and the base fertilizer is sufficient, this top dressing can be appropriately postponed, and the fertilizer can be changed to 750 kg of human manure and urine, or 100 kg of plant ash, 30 kg of ammonium humate, and 30 kg of superphosphate applied by broadcasting. After fertilizing, combine with deep hoeing, carry out earthing up, and then water immediately. After the White Dew solar term, Welsh onions enter the peak period of white stalk growth, which is the key period for yield formation. Combined with watering, apply a "strong plant fertilizer" twice as a top dressing, each time applying 15-20 kg of urea and 10-15 kg of potassium sulfate per mu, applying it between the rows as a top dressing, then watering after shallow intertillage to speed up the absorption and utilization of the fertilizer.
Watering: In late summer and early autumn, the focus of field management is promoting root growth. Watering should be carried out according to the weather. Apart from long periods of clear weather without rain, in general, attention should be paid to controlling watering. After rain, drain water to prevent waterlogging, and prevent root rot, yellow leaves, and dead seedlings. At the same time, strengthen intertillage to promote root growth. From the Start of Autumn to White Dew, watering should follow the principle of light watering and watering in the morning and evening. After White Dew, Welsh onions enter the peak growth period, and watering should follow the principle of frequent and heavy watering. Water once every 4-6 days. After Frost's Descent, the temperature drops, Welsh onions have basically matured, and the water requirement decreases, so the soil should be kept moist. Stop watering 5-7 days before harvest to reduce the moisture content of the white stalk, which is beneficial for harvest and extends the storage period.
Earthing up: In combination with water and fertilizer management, scientific earthing up should also be carried out. Earthing up is an important measure to soften the leaf sheaths, prevent lodging, and improve the yield and quality of the white stalk. From the Start of Autumn to before harvest, generally carry out earthing up 3 times. The first two times are combined with intertillage, pushing the ridge soil into the onion furrows, and after the End of Heat, fill the furrows level. The height of each earthing up for Welsh onions should be determined according to the growth height of the pseudostem, 3-4 cm each time, earthing up to the leaf emergence opening of the uppermost leaf. Never bury the heart leaves, to prevent leaf rot.
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