Flowers that need to be wintered in the cold shed, such as potted camellia, rhododendron, brown bamboo, smiling, Zhu Dinghong, etc., after entering the shed, pay attention to the ventilation and cooling in the sunny day, not to covet the high temperature. The high temperature will break the dormancy of the flower and make it enter the growth state, which will lead to the great reduction of the cold resistance of the flower and the freezing damage.
Flowers that need to grow in the greenhouse, bloom in winter or early spring, such as cineraria, primrose, pouch flower, cyclamen, calla lily, etc., the daytime temperature can be maintained at 15 °C ~ 20 °C, the temperature in the shed should be ventilated Cool down. Coverage should be covered at night, and the temperature should be too low to keep the temperature of the shed at around 5 °C, not below 0 °C. The humidity in the greenhouse is large, and special attention should be paid to the prevention and control of fungal diseases such as black spot and powdery mildew. In order to meet the needs of different flowers and facilitate daily management, it is best to plant the same variety in a plastic greenhouse. If there are no conditions, they should also be placed according to the different temperature requirements of flowers. In the greenhouse, the south is bright and the temperature is high; the north is weak and the temperature is relatively low. The flowers can be placed in sections according to the light and temperature in the greenhouse. The flowers growing in the shed should be moderately controlled to water, keep the soil "see dry and wet", and often ventilate the seedlings to promote their growth.
Flowers that need to be wintered in a high temperature greenhouse, such as bamboo stalks, saplings, cactus, pineapples, rich trees, dragon's blood trees, tropical orchids, etc., can be covered with insulation material in the greenhouse to prevent heat loss at night, sunny night This method is extremely effective. In addition, a simple shed can be set in the shed to form a double shed. The distance between the two plastic films is preferably about 10 cm, the air conductivity in the middle is small, the heat preservation effect is good, and the temperature in the shed is relatively stable. When the temperature needs to be increased in the shed, electric heating or boiler heating can be used, but these two methods have high energy consumption and high cost, and are only applied at a particularly low temperature and in a short time in rain and snow. Flowers that prefer to sleep at high temperatures for winter should stop fertilizing and control the watering to keep the soil in a semi-arid state to prevent rotten roots. During the sunny day, when the temperature in the shed reaches 25 °C, it should be ventilated and drained.
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Magnetic Bead Nucleic Acid Extraction Reagent
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