Onions are a common vegetable that is resistant to transportation and storage. Onion cultivation management is easy, and the economic benefit is between 1000 and 2000 yuan per mu. Experiments have shown that nurturing strong seedlings is the key measure to increase production.
Strengthening onion seedling technology management is the key to improving onion yield and improving onion quality.
First, a reasonable fertilization
In fertilization, we must apply enough base fertilizer to ensure that seedlings do not need to be top-dressed. When the seedlings grow to 15-20 cm in height, combine irrigation with topdressing urea, and apply potassium dihydrogen phosphate 10 days before planting to a concentration of 0.2-0.4. %. The seedbed should be selected for loose soil, keep it moist, and have not been planted with onions in 3-5 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 convulsive in advance, thus affecting yield; seeding too late, seedlings are susceptible to malnutrition, low yield per plant, the appropriate temperature for the growth of onion seedlings in the nursery process is 12- 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 farmers, the coverage of yellow straw is better than that of straw.
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