First, the greenhouse construction and production regulations Greenhouse selection of ordinary winter-warfare vegetable greenhouses converted from the species for the three-year-old Zaomei Li and Moltny Li, plant spacing of 1.82.5 meters, east-west direction. After adopting a multi-dominant natural happy shape and a modified trunk shape for proper pruning, the shed was warmed on January 12th. The buds of plum trees began to sprout on January 30, began to flower on February 13, and entered full bloom on February 17. Bees and artificial pollination should be carried out in the shed during this period. The flower will be on February 27 and the fruit will mature on April 26.

Second, after indoor temperature and humidity control greenhouses are covered, different growth periods require different temperatures. During the flowering period, the ground covers the film, the night temperature is not lower than 0°C, the temperature does not exceed 20°C, and the flower buds begin to sprout after 18-20 days of incubation. The optimum temperature for flowering of fruit trees is 18-22°C, and it is generally maintained at 7-8°C during the night. But at this time, it is a period when the outside temperature is the lowest, so nighttime insulation is the key. During the period of fruit enlargement, the temperature requirement is relatively high, and it can be maintained at about 25°C, and it can be increased to 28°C in the later period, and 10-15°C is appropriate for the night temperature. During fruit ripening, the temperature difference between day and night is usually large. It should be at 25-28°C during the day and cannot exceed 30°C. It should be maintained at 13°C during the night. Pay attention to ventilation here, otherwise it may cause high temperature damage. After covering, the temperature in the shed will rise significantly, the relative humidity will reach 80%, and the humidity in the shed can be controlled through mulching. In addition to irrigating the fruit during the fruit expansion period in the shed, it is generally not watered in other periods. If the humidity is too high, it can be combined with air dehumidification.

Third, fertilizer and water and fruit management in the buckle before the shed to apply base fertilizer, apply 3000-6000 kg of organic fertilizer per acre, phosphate fertilizer 5 kg, 50 kg of potassium sulfate compound fertilizer. After the flowering and young fruit expansion, 2 top dressings are to be applied. The special fertilizer for fruit trees is 1-1.5 kg. From the first week after flowering, spraying 0.3% urea + 0.3% potassium dihydrogen phosphate once every 2 weeks, and spraying 3-4 times. The self-cultivation rate of plums is low, and greenhouses lack opportunities for pollination under open cultivation conditions. Therefore, measures such as putting bees in sheds, spraying 2010-6 gibberellin at flowering stage, artificial pollination and other measures should be taken to improve the fruit setting rate.

4. The pest control greenhouses are isolated from the outside world and the pests and diseases are relatively light. However, due to the humidity in the shed, it is relatively stable, and it is easy to induce gray mold. The prevention and control measures are: timely ventilation and dehumidification, removal of diseased leaves and diseased fruit, and simultaneous use of 35% metalaxyl 2000-3000 times solution or 50% carbendazim 1000 times solution, spraying once every 15-20 days, continuous 2 times, you can effectively control gray mold.

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