Anti-freezing and damage to flowers that are not tolerant to cold should be covered with straw or a small shed in the shed at night; it is also possible to dig a storage tank every few meters in the center of the greenhouse to use the storage tank to keep warm; or sprinkle some ash on the ground, generally Increase the ground temperature by 1 to 2°C.
In the long-term sealing against moisture and damage, rain and snow for a long time, outside the greenhouse should be open drainage ditch, reduce soil moisture. In addition, some ash can be sprinkled on the surface of the pot or the ground to increase heat absorption and moisture absorption and dehumidification. At the same time, attention should be paid to tightening the shed film to prevent water leakage from the top of the shed.
Air-environmental protection sheds should be fully decomposed organic fertilizers to minimize the application of chemical fertilizers. Clear and windless weather should be ventilated and ventilated, and harmful gases in the shed should be discharged.
Disease prevention and control of greenhouse air humidity, we must pay special attention to prevent powdery mildew, black spot disease, anthrax and other diseases. Anthracnose can be controlled by spraying 75% chlorothalonil 500 times at the beginning of the disease; powdery mildew can be controlled by 1:1:140 equal amount of Bordeaux mixture; Melaleuca can be sprayed with 70% Thiophanate 1000 times Drug control. Medications in the sheds should be avoided at sunny noon high temperature period, flowering period.
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