Variety selection Hanzhong winter glutinous, snow hoe, single root red and other varieties, in the last two years, there are new varieties available, such as the yiyuan one. According to local conditions, it should be adapted to local conditions.

Before and after the “winter season” of tying the shed, cut off the dead leaves on the ground to clear the leeks, and use the Xiangnong No. 4 and Xiangnong No. 2 to spray 600 times to sterilize or irrigate the roots. This can prevent diseases such as gray mold. In the ridge ditch top dressing, apply 2000 kg of organic fertilizer per mu, 400 kg of dried chicken manure, add 40-50 kg of compound fertilizer, and add various trace elements such as calcium, magnesium, boron, manganese and zinc. Wait. After the fertilization, pour a little water, cool the sand and sprinkle the fine sand, and then buckle the shed.

Temperature and humidity management after the initial period of the kennel generally do not remove the film to release the wind, pay close attention to increase the temperature within the shed, keep it at 28 °C -30 °C during the day and maintain 10 °C -12 °C at night, in order to promote the leek germination as soon as possible. The daytime temperature of the amaranth after germination is controlled at 15°C-25°C. When the temperature reaches 25°C or higher, it is necessary to pay attention to exhalation and dehumidification. The night temperature should be kept at 10°C-12°C, and the minimum temperature should not be lower than 5°C. In order to increase the commercial quality of leeks, the temperature of the shed is reduced 5-7 days before the harvest of each leeks, so that the leaves are thickened and the color of the leaves is deepened. After the harvest, the temperature of the shed is appropriately raised to about 3°C ​​to promote new shoots as soon as possible. In the future, the temperature in the shed can be increased by 2°C compared with the previous one. However, the maximum temperature cannot exceed 30°C. The temperature difference between day and night should be 10°C-15°C.

Fertilizer management Generally, the first knife during the growth of the leek does not need to be topped with water to avoid lowering the temperature and increasing the air humidity. The head knife must be watered within 7-10 days after the harvest, and when the leek grows to about 10 centimeters, it is poured with water. Afterwards, the management will be analogized. Pay attention to watering at this time to pour water, bogey flood irrigation, combined with top-dressing potassium sulfate compound fertilizer, about 10 kg per mu about irrigation.

Pest management Due to the enclosed environment of the small arch shelters, the air has high humidity and is relatively prone to gray mold and diseases. Therefore, we must follow the principle of “prevention first, comprehensive prevention and control”. We must first choose land plots that are dry and easy to land and irrigation. During the growth of leeks, try to avoid high temperature and high humidity conditions. The prevention and treatment of gray mold can use Xiangnong 2 and Shijiale, and can be treated with phoxim emulsion.

Harvesting should be timely and appropriate. For annual leeks, 2-3 收 can be harvested; for two years or more, 3-4 收 can be harvested. The standard for harvesting each leek is best to achieve seven leaves. Harvest time is best in the morning, when harvesting, it is advisable to cut 3-4 cm yellow leaf sheath at the upper part of the bulb. It is advisable to cut and sew and pack it in time to keep fresh leeks and prevent freezing water from freezing.

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