Cover the cover. Before the evening, you should set up a small shed in the shed and cover the straw curtain. At night, add grass or corn stover around the greenhouse to increase the temperature from 1 °C to 2 °C. Add a thin layer of enamel on the original grass to increase the temperature of the shed by 2 °C to 3 °C.

Reveal at the right time. In sunny weather, when the temperature rises, the cover should be exposed as early as possible to promote the photosynthesis intensity of flowers. In the deep winter, the grass is generally uncovered when the morning sun fills the entire shed, and the temperature in the shed is generally not lower than 18 °C. When the weather is cloudy or cloudy, the light is weak. It is also necessary to uncover the grasshoppers in time to make the scattered light incident. On the one hand, the temperature can be increased. On the other hand, because there is more blue-violet light in the scattered light, it is beneficial to photosynthesis.

Heating is available. The temperature in the shed is too low. In the case of extremely cold weather, a stove or a heating can be added in the shed. However, when using the fire, you should pay attention to prevent flower gas poisoning. The chimney should be installed to output the gas outside the shed to prevent smoke from blooming. It is extremely harmful.

Spray the tree to the generals. Before the temperature is lowered, the stems and leaves of the plants are sprayed with the general tree guards to prevent cold and freeze.

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