the technology of growing seedling

Sowing was carried out in the greenhouse. Coconut bran matrix was placed in a 72-well hole dish, and then placed on a tidal Greenhouse seedbed. Nutrient solution (EC: 1.6 mS/cm, pH: 7.4) was poured to saturate the substrate with water absorption. The seeded hole plates are placed in a centralized manner according to the varieties, and the varieties and sowing date are marked. After that, spray water on the surface of the seeded hole plates with a watering can until the seed coating is soaked. Finally, cover the holes with non-woven cloth for moisture, and remove the holes after the seeds bud. Check the moisture condition of the substrate every day, and water in time to prevent drying of the substrate. The temperature of the seedling area is 22~24℃ during the day, and it is heated according to the outside weather at night, and the curtain insulation is started at the same time. The temperature at night is kept at 12~14℃, and the seedlings can germinate in 3 days.

Lettuce transplanting

When the seedlings grow trifoliate, they will reach the colonization standard and can be transferred to the planting area in batches. Gently take out the vegetable seedlings in the substrate tray and place them upright in the cultivation holes. After each variety is transplanted, mark the variety name, sowing date and transplanting date. After the transplanting is completed, check again whether the cultivation tank is aligned with the water outlet.

Environment and water and fertilizer management after transplanting

After being transplanted to NFT Pipes Hydroponics , the temperature was controlled at 25℃ during the day and decreased to about 12℃ at night. After colonization, NFT system was used for irrigation of lettuce, which was set to irrigate once in 25~40 min and once in 3~5 min. Nutrient solution configuration is the core of NFT cultivation technology. Nutrient solution formulation and control directly affect crop growth, yield and quality. Can make lettuce professional formula, or general leaf vegetable special fertilizer, A fertilizer and B fertilizer separately configured, nutrient solution preparation water for clean and pollution-free RO pure water, configuration needs to adjust the EC at about 1.5 mS/m, pH at about 7.5.

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