Onions are common vegetables that are resistant to transport and storage. Onions are easily managed and the economic benefits range between $1,000 and $2,000 per acre. Tests have shown that breeding is a key measure for increasing production。
I. Rational fertilization
In the area of fertilization, the application of bottom fertilizers ensures that young seedlings do not need to be followed up in the early stages, when they grow to 15-20 cm high, combining water, urea and potassium phosphate sprayed 10 days before planting, at concentrations ranging from 0. 2% to 0. 4%. The seedbed shall choose the soil which is fertilized and humid and which has not planted garlic in three to five years。
Ii. Pour bottom water
Based on the many years of experience of vegetable farmers, onion seedlings are wet-drying better than dry broadcasting. The bottom water is saturated to a depth of not less than six centimetres in order to meet the need for onion seedlings, and the mid-course water fills up the bed sheet to the detriment of the whole seedling and onion growth。
Iii. Enhancing in time
Onion seeding must be adapted to local conditions, sowing too early, growing too fast and easily gravitating, thus affecting yields; sowing too late, the seedlings are prone to malnutrition, low yields alone, and the suitable temperature for onion seeding is 12°c ~20°c。
Iv. Timeliness
Onions are sowed in time to maintain soil moisture and prevent storm washage. Where possible, a shade mask should be chosen. Conditions are not readily available and covered with grass. Based on vegetable experience, artemisinin cover is better aerobic than wheat grass, with less contamination of seedbeds。
V. Fabricating leaves
The absorption of phosphorus fertilizer from the soil is slow, and the application of phosphorus to the onion leaves can contribute to root system development. The 10-15 days before the planting of the onions' leaf was sprayed with “georgum tirin” + 0. 20% - 0. 40% potassium phosphate, which increases the capacity of the onion to grow after planting。
Strengthen the management of onion breeding techniques, improve onions production and improve onions quality。
