Greenhouse Umbrella Melon Early Spring Cover Cultivation
Second, the determination of seedling nursery time is mainly based on the period of the safe colonization of greenhouses. In the greenhouse, the UFO melons can be safely planted at a temperature of 10°C or above and the night minimum temperature is not lower than 8°C. Their seedling age is generally 25-35 days, and the general sowing date is from early February to late. The greenhouse seedlings are 25-30 days old and the nursery seedlings are 30-35 days old. Third, planting and post-management to improve ground temperature, planting 15-20 days before the lock shed. When the temperature in the shed is 10-15 centimeters above 11°C, there is no 0°C low temperature at night, and the seedlings can be planted with 3-4 true leaves. The planting density is 1500-2000 plants/mu. One or two rows of colonization per ridge. Colonization is best done on sunny mornings. When planting, plant the seedlings by water or cover the soil after watering the holes. Never avoid watering too much. The depth of colonization is suitable for exposing the cotyledons to the ground. About 25 days after planting, it was pre-harvest. The management focuses on cold insulation, water control, cultivating roots and promoting seedlings. After the planting, 5 to 7 days before the easing of seedlings, the closed greenhouses were not released. Shed temperature control 昼 25 °C -30 °C, night 15 °C -18 °C. Slowly after the seedlings are properly cooled, the temperature is 22°C-25°C and the night is 15°C. When the temperature of the shed exceeds 30°C, it should be released. Generally, prudent watering should be avoided before the root squash is settled to avoid pouring water. During the harvest of root melons until the fourth and fifth melons are harvested, the supply of fertilizer and water should be met, and fertilizers such as urea should be supplemented as appropriate, each at 10-15 kg/mu.
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