Onions are a common vegetable that is resistant to transportation and storage. Onion planting management is easy, and economic benefits per mu between 1000-2000 yuan. Experiments have shown that nurturing strong seedlings is the key measure to increase production.
First, a reasonable fertilization
In fertilization, it is necessary to apply enough base fertilizer to ensure that seedlings do not have to be top-dressed in the early stage. When the seedlings grow to 15 to 20 cm in height, combined with irrigation, topdressing urea, potassium dihydrogen phosphate is sprayed for 10 days before planting at a concentration of 0.2%~ 0.4%. Seedbed soil should be selected for loose fertility, be able to keep it moist, and have not been planted with onions and garlic within 3 to 5 years.
Second, pouring sole water
According to many years of experience of vegetable farmers, wet sowing of onion seedlings is better than dry seeding. Bottom water filling, irrigation depth of not less than 6 cm, to meet the needs of onion emergence, halfway irrigation to make the seedbed hardened, unfavorable to the healthy growth of whole seedlings and onions.
Third, timely sowing
Onion sowing must be adapted to local conditions, sowing too early, seedling growth is too fast, easy to bolting in advance, thus affecting yield; seeding too late, seedlings are susceptible to malnutrition, the yield per plant is low, the suitable temperature for the growth of onion seedlings in the nursery process is 12 °C ~ 20 °C.
Fourth, timely shade
After the onion is sown, timely cover or cover the grass to keep the soil moist and prevent rainstorms. Sunscreen should be used where conditions permit. Conditions do not have local materials, covered with grass. According to the experience of vegetable farmers, the use of Artemisia halodendron covered wheat straw with better permeability and less seedbed contamination.
Fifth, spraying fertilizer
The process of phosphorus absorption from onions by the onion is very slow, and spraying the onion leaves with phosphorus can promote root development. 10 to 15 days before planting on the leaf surface of onion seedlings sprayed "Digolide" + 0.20% ~ 0.40% potassium dihydrogen phosphate, can increase rooting ability after onion colonization.
Strengthen the management of the above onion seedlings, increase onion yield, and improve onion quality.
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