How can the greenhouse flowers winter?

According to observations, the continuous rain and snow weather, the shed temperature and the temperature difference outside the shed 2 °C -4 °C; sunny day, the shed heating up quickly, can be higher than the shed outside 15 °C -25 °C; and early morning or late evening, shed temperature Only 1 °C to 3 °C above the shed. Therefore, according to different types of flowers, the rational use of plastic greenhouses. First, flower pots suitable for wintering in the cold room, such as camellia, rhododendron, palm bamboo, mimosa, primrose, etc. In the Yangtze River valley, as long as they are protected at a low temperature, they can safely overwinter in a dormant state. After entering the shed, pay attention to the ventilation and cooling of the sunny day, and do not break the dormancy. Of course, if it is for the purpose of flowering, it is another matter. Cineraria, Primula, Pohuhua, Cyclamen, Calla, etc., the daytime temperature is maintained at 15°C—20°C, the temperature in the shed is too high to be ventilated, the temperature is covered at night, the temperature is too low and the temperature should be increased to 5 °C, not lower than 0 °C. Second, suitable for winter flowers in the greenhouse of cactus, pineapple class, bamboo grass class, change wood, Brazilian iron, money tree, dragon tree, tropical blue and other hi-temperature flowers. First, the greenhouse is covered with thermal insulation materials to prevent heat loss at night. This method is extremely effective at night during sunny days. Second, a simple shed is placed inside the greenhouse, ie, a double shed. The distance between two plastic films is preferably about 10 cm. The air has a small thermal conductivity in the middle, and the insulation effect is better. The temperature inside the shed is relatively stable. Third, warming up, using electricity or boiler heating, energy consumption is relatively high, the cost is high, can be combined with the first two measures, at a special low temperature and short rain and snow days application. Such flowers need to be ventilated during the daytime when the temperature in the shed exceeds 25°C and remain dormant for winter. In addition, the air humidity in the greenhouse is large, and special attention must be paid to the prevention and control of fungal diseases such as black spot and powdery mildew. The flower that stays awake for winter must stop fertilizing, control watering, and maintain a semi-arid state to prevent dead roots and rot. The flowers growing in the shed should also be properly controlled for watering. See dry and wet, often ventilate, and maintain vigorous growth.

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