1. Cultivation season in the Jiangnan region is generally sown in mid-August to early September. Sowing too early, high ground temperature, rainfall, seed Sheng easy to rot; too late, the growth period is short, reducing yield.

2. Sowing before sowing per hectare of rotting organic fertilizer 45000 ~ 60000 kg, deep turning, harrowing. Then make a small raised bed 2~2.5 meters wide.

Allium is mostly propagated by bulbs. Before sowing, choose the shape of neat, fat, tiller less, no rotting and deterioration of the bulb for seed. Remove the small, rotting, disabled. Seed bulbs to remove dry leaves, cut off the long roots, retaining 1.6 cm long.

In the raised beds according to the row spacing of 25 centimeters to open a ditch, ditch depth of 8 ~ 10 centimeters. When planting, if 1 seed per hole, hole spacing 7~8 cm; if 2~3 seeds per hole, hole spacing 15~16 cm. After planting, cover with thin soil to slightly expose the top of the stubble stalk. After planting the whole bed, a thin layer of grass, while pouring a layer of rotting stable fertilizer, about 15,000 kg per hectare.

After sowing, should pay attention to watering, keep the soil moist, about 7 ~ 10 days to germinate out of the soil.

3. Field management after the emergence of seedlings began fertilizer, every 15 ~ 20 days, each time per hectare after rotting human urine 15000 kg, or compound fertilizer 225 ~ 300 kg. It has been chased to the next year before the harvest to help days. Growing period often keep the soil moist, no rain 3~5 days a water. Pay attention to drainage after heavy rain to prevent long-term flooding.

Tillage and weeding 2~3 times during the growing period, in the bulb expansion period combined with appropriate soil cultivation. During the following summer, the growth potential is gradually declining, feasible bunching of leaves, to promote bulb hypertrophy.

4. Harvesting, seed retention to young leaves and bulbs for food, in the second year of planting January to April can be harvested on the market. To harvest young stems mainly, can be harvested from May when the leaves begin to turn yellow, until September. The yield is about 15,000 kilograms per hectare. Retention of seed delayed to July harvest, will meet the seed standard bulbs in a ventilated and cool place for storage, can also be in the field over summer, until 10 days before planting harvest.

(F) intercropping, set seeding technology Allium growing period is very long, and resistance to low light, in order to improve economic efficiency, should be intercropping, set seeding cultivation. Jiangnan area with corn, soybean or sweet potato, radish set planting. This cultivation can make full use of land and light energy, increase economic benefits.

Before sowing corn or sweet potato in the lotus before sowing, in the corn or sweet potato rows set seed lotus. Corn and sweet potatoes are harvested in early winter. In early spring of the following year, planting soybean or radish between the rows of allium.

(7)Prospect prediction of Allium is a rare vegetable in China, and the cultivation area is relatively small. But Allium's food value is very high, and is an international best-seller, one of China's export vegetables. Therefore, it is necessary to vigorously develop and expand the area. At present, the cultivation of Allium is limited to the southern provinces, in fact, the use of plastic greenhouses and other protective facilities in northern China can also be cultivated. In the future, appropriate planting in the north, for people to consume is necessary.