Allium (sound unloading, xiè), also known as rakkyo or as rakkyo (rakkyo, shaving, sound call, jiào), small garlic, scallion head, wild garlic, wild leek and so on. A perennial herb of the genus Allium in the family Liliaceae, a vegetable plant. Native to China, it is recorded in the Han Book of Gong bypassing the biography. Now, the southern provinces are planted, northern people rarely eat Allium. Leaves green, slender tubular, triangular cross-section. Leaf sheaths clasp into pseudostems, the base forming a thick bulb. The bulb is spherical, onion-like, white, and is the main edible part. Flowering stems in fall, umbels, small flowers. Used medicinally it has the function of regulating qi and broadening the chest, promoting yang and expectorating phlegm.

Allium is widely adapted to the climate requirements are not strict, suitable for cool, grow well in cool temperatures. Growth and development of the appropriate temperature of 15 ~ 19 ℃, 30 ℃ above the high temperature is dormant over the summer, 10 ℃ below the slow growth, can not tolerate 0 ℃ below the low temperature for a long time. In the soil requirements are not strict, barren, suitable for a variety of soil cultivation. But to well-drained loose loam, sandy loam is better.

Cultivation techniques:

1. Cultivation season in the Jiangnan region in mid-August to early September sowing. 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 to 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. Eliminate 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 25 centimeters to open a ditch, ditch depth of 8 ~ 10 centimeters. Planting, such as 1 seed per hole, hole spacing 7 to 8 cm; such as 2 to 3 seeds per hole, hole spacing 15 to 16 cm. After planting, cover with a thin layer of soil to slightly expose the top of the stubble stalk. After planting the whole bed, spread 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 until the next year's pre-harvest 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. Growing period of plowing and weeding 2 to 3 times, in the bulb expansion period combined with the appropriate cultivation of soil. During the following summer, the growth potential is gradually declining, feasible leaf bundling, promote bulb hypertrophy. 4. Harvesting, seed to young leaves and bulbs for food, in the planting of the second year of January to April can be successively harvested on the market. In order to harvest the young stem-based, can be harvested from May when the leaves begin to turn yellow, has been harvested until September. The yield is about 15,000 kilograms per hectare. Retention of seeds 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 the summer, until 10 days before planting harvest.