Onion cultivation technology in Jianghuai region

It belongs to the family Liliaceae and is widely cultivated around the world. It is popular among consumers for its unique flavor, rich nutrition, storage resistance, and convenient eating.

I. Nursery

1. Select the variety. Suitable varieties for cultivation in the Jianghuai region are: Jiangsu Baipi, Nanjing Redpi, Redpi 502, Winner, Sun Honey.

2. Fertilize the land. Rainfall is high in this area, and high-intensity seed beds should be used. 15 days before sowing, 45,000 kg / ha of rotten cooked farm manure was applied, and 15 cm deep into the soil layer was thoroughly mixed with the soil, and then the noodles were leveled.

3. Sowing date. Sowing on September 10-20, soaking seeds for 10 hours before sowing, sowing 60-75 kg per hectare, 0.7-1 hectares can be planted, premature sowing seedlings are easy to succumb early; late sowing seedlings are small and have poor wintering properties.

2. Colonization and later management

1. Site preparation and fertilization. Apply 37,500 kg of cooked farm manure per hectare, 375-450 kg of superphosphate, and plow the soil about 20 cm to fully mix the fertilizer with the soil to keep the soil structure loose. Then flatten the surface to make a high ridge.

2. Select healthy seedlings for planting. Healthy seedling standards: leaf sheath diameter 0.6-0.9 cm, 3-4 true leaves, seedling age 80-90 days. Eliminate diseased seedlings, weak seedlings, dwarf seedlings, tiller seedlings, and long seedlings.

3. Colonization. The planting time is November 25-30, the row planting distance is 18-20 cm × 12-25 cm, the density per hectare is 425,000-450,000, and the planting depth is 2-3 cm. Seedlings must be slowed and restored to growth before the severe cold arrives.

4. Topdressing. After returning to the green, the first fertilization was applied, and 15000-18000 kg of fertilized manure was applied per hectare. After 15-20 days, the seedling fertilizer was applied again. The fertilized human feces had 15,000 kg of urine or 150-225 kg of ammonium sulfate. Topdressing 2-3 times, focusing on medium-term topdressing with bulb hypertrophy, with less topdressing in the early and late stages, 150-300 kg of ammonium sulfate per hectare.

5. Water slurry management. Slow watering irrigation in the slow seedling period promotes rooting; winter irrigation protects the seedlings before wintering; irrigation and drainage are combined when returning to green in early spring to keep the soil surface wet and deep and wet; control the water during bulb expansion and watering can be combined with topdressing; The individual plants in the field showed lodging and stopped watering.

3. Harvesting. The harvest period is from May 20 to June 10, in the late stage of bulb hypertrophy, no new leaves fill the leaf sheath and become hollow. When it is difficult to bear the weight of the leaf itself, the plant will fall from the neck of the leaf sheath, and lodging will occur. That is, it should be harvested.

Harvesting standards: For early, medium-maturing, and poorly storable varieties, harvest at 30-50% of lodging plants; for medium- and late-maturing, long dormant periods, and storage-resistant varieties when 70% of lodging plants are harvested .

The harvesting arrangement is chosen to be carried out on sunny days 3-5 days after harvesting, as far as possible without damaging the bulbs and breaking the leaves. It can be marketed by drying in the field for 3-4 days, and can also be braided and stored for another day.

Disclaimer: Some articles on this website are transferred from the Internet. If third party legal rights are involved, please inform this website to deal with them. phone