1, onion sowing and seedling management
The sowing time is in the middle of September and the seedling age is 50-60 days when transplanting. Sowing method is mainly used for sowing, but it can also be sowed. The amount of seeds used is 5-6 grams per square meter, and 100-150 grams per 1/15 hectare of field crops is cold. Pouring water before sowing can be seeded 7-8 days after sowing. After the emergence of seedlings and time, seedlings from 3 cm. Pay attention to pest control and eliminate weeds.
2. How to fertilize onions
Shallow onion roots, hi fertilizer, should choose fertile soil, water retention and fertilizer performance of soil cultivation. For every 1/15 hectares, 4,000 to 5,000 kilograms of high-quality organic manure is applied (organic manure is best to be sterilized), 75 to 100 kilograms of potassium sulfate compound fertilizer, and 30 kilograms of urea are uniformly spread on the ground, and then ploughed and plowed. 20-25 cm, to intensive cultivation, so that the soil is no dark spots. After the site preparation, the ridges were ridged, ridge width 30-40 cm, width 180 cm wide, and planting width 210-220 cm. For every 1/15 hectares, 1 kg of insecticides were sprayed on insects to clean the land. For every 1/15 hectares, Shi Tian fills up 100-150 ml, and finally covers the mulch.
3, onion field management
Pour frozen frozen water when the soil is frozen and freeze at night to prevent freezing damage. In late March and early April, combined with fertilization and pouring back to Qingshui, 1/15 hectares of topdressing 15 kg of urea and 15–20 kg of potassium sulfate compound fertilizer. When the bulb begins to swell, it floods with water, 1/15 hectares of topdressing urea 8-10 kilograms, potassium sulfate compound fertilizer 15 kilograms, and micro-fertilizer can also be sprayed. Prevent pests and diseases timely.
4, timely harvest
20 days before the harvest, it is forbidden to use any chemical fertilizers or pesticides. When one-third of the leaves of onions are yellow and pseudo-stems are soft, harvest them timely and harvest them in sunny weather. Do not collide at the time of collection and carry out drying in a timely manner. Try to avoid direct sunlight, and then grade and pack.
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