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2 Sowing period: generally push the planting period forward 30 to 45 days, which is the sowing period, the greenhouse temperature in the autumn greenhouse is high, the seedling age does not exceed 30 days. Winter seedling age does not exceed 45 days.
3 Seeding: Broadcasting, drilling can be. Use 300-450 grams per hectare. Spread the seedlings into the nursery pot. After soaking the water, sprinkle a layer of sieved fine soil on the surface of the pot, and then spread the seeds evenly into the nursery pots. Cover a layer of 0.8 to 1 cm thick screened fine soil. When drilling, the spacing is 6 to 7 cm, the depth of the ditch is 0.8 to 1 cm, the seeding distance is 0.5 to 1 cm, the footing water is poured before sowing, and the earth is sowed after sowing. The seedlings should be sown in the fall, and seedlings do not need to be planted.
4 Management of nursery pods: After cultivating green cauliflower in winter and spring, the temperature in the greenhouse should be kept at 20-25°C during the day and the ground temperature should not be lower than 15°C, otherwise the seedlings will grow slowly. Suitable temperature, 2 to 3 days to emerge. After the seedlings are unearthed, keeping the temperature at 18-20°C is conducive to the cultivation of strong seedlings. In order to prevent the ground temperature from decreasing, the nursery stocks are generally not watered. When the seedlings grow to 2 to 3 true leaves, they should be seeded in time.
In the autumn, when the temperature is still high, the seedbed should be shaded with a net or a plastic film shed to prevent rain and shade. Ventilate around the shed. After sowing, the groundwater can be often poured to cool the seedbed. However, the groundwater should be poured and the seedlings should be kept intact. The water is not too wet. Autumn seedlings have a shorter seedling age and are generally not seedlings.
5 points seedlings: 1 day before seedlings, the seedling shoots were first irrigated so that the rooting was reduced when raising seedlings. After the seedlings are transplanted, seedlings are transplanted to the seedling pods by 12 to 15 centimeters square. The seedlings are watered in time after transplanting, and 75 kg of urea are topdressed at each hectare to promote seedling growth and seedling regrowth. When the seedlings grow to 5-7 true leaves, they can be planted. 6 points seedling management:
(a) Temperature: The daytime air temperature is maintained at 24 to 25°C after seedling separation, and 12 to 13°C at night. After the sub-seedling in winter, the greenhouse is covered with a small shed to increase the temperature, and after 3 to 4 days, the seedlings are removed and the membrane is cooled. The daytime temperature is controlled at 15 to 20°C and not less than 10°C at night. One week before colonization, the temperature was lowered to 3 to 4°C for hardening.
(b) Water and Fertilizer: Timely watering after seedlings, 3 to 4 days to water the seedlings, in order to promote the slow seedlings, the seedlings can be covered with thin film insulation and moisturizing. After thinning the seedlings, remove the thin film, and remove the thin film for 2 to 3 days. . Seedlings generally do not top-dressing, can be sprayed as appropriate foliar.
Green broccoli cultivation in greenhouse
1 Seedling preparation: The cauliflower has a short seedling stage. In autumn, the organic-rich plots should be selected as seedbeds. The nursery bed should be filled with base fertilizer and NPK fertilizer to ensure its nutrient supply at the seedling stage. Planting area per hectare requires 75 to 105 square meters of seed bed area and approximately 750 square meters of transplant bed area.