What are the cultivation techniques of leek in greenhouse?
1. Variety selection
Select high-quality and high-yield varieties with strong adaptability, strong tillering ability, wide and straight leaves, short dormancy period and early germination. And it should be suitable for the local area.
2. Seedling management
Direct seeding or seedling raising before and after Tomb-Sweeping Day. Direct seeding mostly adopts row seeding, with row spacing of 33-35cm, sowing ditch depth of 2cm, sowing width of 5cm and seed consumption of 3.0-3.5kg per mu; : Seeding, seedling raising and transplanting, 0.75- 1.0kg per 0. 1 mu seedbed, which can plant 1.0 mu of fields. Soak seeds before sowing to accelerate germination. The method is to soak the plump new seeds in warm water of 30 degrees 12 hours, then take them out and wash them with clean water for 2-3 times, then wrap them in clean wet cloth and put them at 25 degrees to accelerate germination. After 2-3 days, when 30% of the seeds turn white, you can sow. Pay attention to weeding, fertilizer and water management in leek seedling stage to ensure its normal growth.
Step 3: Planting
Sow the seedlings in spring for 70-80 days, the height of the seedlings is 1820 cm, and they can be planted when there are 5-6 leaves. Before planting, 5000 kilograms of be adept at organic fertilizer and 50 kilograms of compound fertilizer were applied per mu. Deep ploughing and fine fertilization, soil preparation for border surface, border width 2m, border ditch width 50cm and length 30m (greenhouse span 4.5m, length 30m, two borders and one shed).
4. Tian Tuan management
After planting, water the roots with enough water to stabilize them, and water them once every 4-5 days in the initial stage 1 time, so as to promote the slow-growing seedlings to be cultivated 2-3 times in the middle after each watering, and strengthen drainage in rainy season. After autumn, it is necessary to strengthen the management of fertilizer and water, generally watering 1 time every 5-7 days and topdressing once every half month for 2-3 times in a row. Top-dressing urea 15kg or Bika water-soluble fertilizer 5kg per mu, and stopping topdressing and watering in late September. 1 11in the middle and late October, after the outer leaves of leeks are completely withered, they are covered with plastic films. Cut leeks, clean the border, and water and fertilize before the shed is buckled. After drying for 3-4 days, choose a windless sunny day to buckle the shed.