1. Choose suitable varieties
Due to the high temperature at seedling stage, seedlings are susceptible to virus disease, so antiviral varieties should be used; for delayed supply period, special-resistant storage varieties should be used.
2. Take shade and cool down, prevent rain and prevent floods and cultivate strong seedlings
Using a nursery for seedlings, seedbeds can be placed in sheds that retain the top film (with good ventilation and rain protection), or in newly-provided nursery arbors (that is, with a top cover membrane, ventilated around). At 3 o'clock in the afternoon, shade nets are used to cool the shade. At the same time, on the crops surrounding the seedbeds and on the weeds, sprays shall be strictly applied to control lice, in order to reduce the transmission of maggots.
It is very important to prevent seedlings from raining in the summer, because the seeds of the seedlings are susceptible to seedling disease. In summer, the temperature is high and the water evaporates quickly. It is not appropriate to control the water excessively. The water shortage in the seedbed should be properly watered. 0.2% urea plus 0.2% potassium dihydrogen phosphate can also be used for 2 to 3 times foliar dressing, promoting seedling robust. At the seedling stage, 600 to 800 times 75% chlorothalonil wettable powder can be sprayed to prevent diseases. At the same time, care should be taken not to overshadow the shading, and to make the seedlings more direct light for a few days before planting to prevent the seedlings from becoming leggy. Sowing for 25 to 30 days, the seedlings can be arranged for planting at the same time.
3. Pay attention to promoting fertilizer and water
Planting the seedlings after planting the seedlings, the plants entered the vine extension period. At this time, the temperature in the greenhouse was high, and the plant's stems and leaves grew faster. In order for the plant to form a large leaf area as soon as possible, it lays the foundation for fruit set and fruit enlargement. In view of the fact that the soil is not a valid nutrient, special attention should be paid to promoting manure. Shallow ditch can be opened in the vicinity of the plant, ammonium sulfate 15 ~ 20 kg per mu, or urea 7.5 ~ 10 kg, watered after fertilization.
4. Do a good job of greenhouse temperature management
Practice has proved that the thick and thin melons can be cultivated in autumn and winter. When the plants are planted, they should be put on a good shed film so that it is easy to control the rainwater and it is also beneficial to the melon seedlings. In order to avoid the high temperature in the greenhouse, the winter warm greenhouse can be rolled up or temporarily not on the film; arch round shed can be rolled up or temporary film. By the end of September, when the weather turns cold, all the film should be covered at night.
Before the frost falls, when the temperature in the night shed does not reach 15°C, it shall be promptly plucked. However, depending on the temperature conditions in the shed, ie, when the temperature is high at night, only part of the grass worms can be covered to prevent the night shed temperature exceeding 20°C. The night shed temperature should not reach 13°C. All rakes should be covered. If there is rainy weather and the minimum night temperature is not lower than 10°C, it may not be covered at night.
In November, the weather turned cold and cold currents invaded. Attention should be paid to increasing coverage to prevent melons from being chilled or even chilled so that the temperature of the night canopies should not be lower than 8°C in any case. One way to increase the cover is to increase the thickness of the grasshopper; second, it can be covered with a film on the grasshopper.
5. Properly delay harvesting
In autumn and winter, thick and thin melons can be cultivated. Under the premise that the temperature and light conditions in the shed will not cause the fruits to suffer cold damage, the harvest can be delayed properly to postpone the listing and obtain better economic benefits. Canopy round can not be covered, the melon vines can be brought down from the hanging rope, and then buckled a small arch shed, can also effectively postpone the harvest period.
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