How should Welsh onions be watered and fertilized in autumn to grow well?
How should Welsh onions be watered and fertilized in autumn? Please give an introduction. The focus of autumn field management for Welsh onions is promoting root growth, building strong plants and earthing up for blanching, strengthening water and fertilizer management, and creating suitable environmental conditions for the formation of the white pseudostem, thereby increasing the yield and quality of Welsh onions. After the Welsh onions are planted out, they enter summer, and at this time the management...
How should Welsh onions be watered and fertilized in autumn? Please give an introduction.
The focus of autumn field management for Welsh onions is promoting root growth, building strong plants and earthing up for blanching, strengthening water and fertilizer management, and creating suitable environmental conditions for the formation of the white pseudostem, thereby increasing the yield and quality of Welsh onions.
After the Welsh onions are planted out and summer arrives, the focus of management at this time is promoting root growth; watering should be controlled, and after rain drainage should be carried out to prevent waterlogging, so as to prevent root rot, yellow leaves and dead seedlings. At the same time, cultivation should be strengthened to promote root growth. From the Beginning 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 to 6 days. After Frost's Descent, temperatures drop, the Welsh onions are basically fully grown, and water demand decreases, so the soil should be kept moist. Stop watering 5 to 7 days before harvest, which is beneficial for harvest, storage and transport.
On the basis of applying sufficient base fertilizer, Welsh onions also need to be topdressed in stages. After the Beginning of Autumn, when plant growth speeds up, apply a "leaf-promoting fertilizer", applying 1500 to 2000 kg of decomposed farmyard manure and 20 to 25 kg of superphosphate per mu to promote leaf growth. After White Dew, the Welsh onions enter the peak growth period of the white pseudostem, which is the key period for yield formation, and a "plant-promoting fertilizer" should be applied twice in combination with watering, each time applying 15 to 20 kg of urea and 10 to 15 kg of potassium sulfate per mu, applied between the rows, followed by shallow cultivation and watering.
Earthing up is an important measure for softening the leaf sheaths, preventing lodging, and increasing the yield and quality of the white pseudostem. From the Beginning of Autumn to before harvest, earthing up is generally done 3 times; the first two times are combined with cultivation, banking the ridge soil into the onion furrows, and after the End of Heat the furrows are filled level. The height of each earthing up for Welsh onions should be determined according to the growth height of the false stem, 3 to 4 cm each time, banking soil up to the leaf emergence opening of the uppermost leaf, and the heart leaf must never be buried, to prevent the leaves from rotting.
Onion and garlic vegetables are crops that require a lot of fertilizer and are also tolerant of fertilizer. Applying sufficient base fertilizer is very important; generally, organic fertilizer combined with phosphorus and potassium chemical fertilizers or a ternary compound fertilizer can all be used. The nutritional characteristics of onion and garlic vegetables are that they are both potassium-loving crops and sulfur-loving crops. Therefore, under the premise of balanced fertilization, attention should be paid to the application of potassium sulfate, which has a clear effect on increasing yield and improving quality.
Tip: Onion and garlic vegetables have high unit yields, so applying sufficient base fertilizer is very important.
Onion and garlic vegetables love both potassium and sulfur, and applying potassium sulfate helps increase yield and improve quality.
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