Cultivation Technology of Chives in Greenhouse

Leek is a common vegetable in our country, which can not only be eaten cold, but also can be fried with eggs, so it is very popular in the market. At present, it is planted in many greenhouses. What are the techniques for planting leek in greenhouse?

1. Site selection and shed construction: the site of leek in greenhouse should choose sandy loam with convenient transportation, good irrigation conditions and rich organic matter. The border is built in the north-south direction, with a width of 1.5 meters, a width of 0.6 meters and a length of 30-40 meters, with a greenhouse built every 2 borders.

2. Seed treatment: leek can be sowed in spring and autumn in greenhouse. According to the arrangement of stubble, spring sowing is better. Spring sowing is in early April and autumn sowing in mid-late September. After selecting the time, soak the seeds in 30-40 ℃ warm water for 8-12 h or cold water for 48 h, pick up and drain water, wrap them in gauze bags and accelerate germination under the condition of 15-20 ℃. Rinse with clean water once a day, and sow most of the seeds when they are white after 2-3 days.

3. Sowing and raising seedlings: the seeds were planted in a shallow ditch with a row spacing of 10-12 cm, a depth of 1.5-2.0 cm and a width of 2 cm. The seedling growth was slightly crowded but easy to manage. Before sowing, first pour sufficient bottom water in the border, and then sprinkle 0.2-0.3 cm thick subsoil on the border surface after the water seeps, and then sow seeds.

4. Post-emergence management techniques:

(1) and time seedling replenishment: check whether the seedlings emerge every morning after sowing for 3 days, and remove the plastic film in time after emergence to prevent seedling burning. The seedlings should be promoted and controlled after they are unearthed.

(2) Water requirement: when the seedlings grow from the first true leaf to 3-4 leaves, the root system of the plant is weak and mostly distributed in the surface layer of the soil, which is not short of water, and is generally watered every 3-5 days.

(3) Fertilizer requirements: the root system is well developed when the seedlings grow 5 leaves and the height is 10-12 cm. Properly control watering to prevent lodging caused by overgrowth. From about 12 cm of seedling height, it should be combined with watering and topdressing for 2-3 times, and urea should be applied for 10-15 kg each time. In addition to water and fertilizer management, artificial weeding at seedling stage should be pulled out early, small and fully pulled out as far as possible.

(4) cultivating soil in middle ploughing: generally, the soil should be cultivated three times in the first year, the first time when the seedling height is 25 cm, the second time when the seedling height is 30 cm, the third time when the seedling height is 35-40 cm, the soil should be properly higher, but should not exceed the leaf sheath.

(5) covering the greenhouse at the right time: the cultivation of leek in the greenhouse generally covered the greenhouse film in the middle of November, and the greenhouse film was removed in the first ten days of April. Pay attention to the temperature management in the greenhouse during the covering of the greenhouse film. Let out the air in time when the temperature is high, the temperature of the greenhouse should not exceed 25 ℃ during the day, close the shed in time when the temperature is low, keep the temperature not lower than 5 ℃ at night, and then add a small bow shed to keep warm when the temperature is too low.

(6) weeding: after soil preparation and before transplanting, herbicides such as 48% trifluralin EC 400 times, 50% Acetochlor EC 500 times, 50% Acetochlor EC 500 times, 33% field supplement (pendimethalin) EC 300 times can be selected to control weeds; weeds appear in the field after planting, and it is no longer suitable to use herbicides, so it is better to pull out early in time.

(7) Pest control: the main common diseases and insect pests are blight, gray mold, Sclerotinia sclerotiorum and onion aphids, leek mushroom mosquitoes, etc., so prevention and control measures should be taken in advance, and drugs should be given to the pests in time.

Generally speaking, leek is easy to grow, as long as you build a greenhouse, select seeds, plant seeds, do a good job of water and fertilizer, pest control, weeding and other work.