1, irrigation before freezing. Before the onset of the cold wave, if a small shed can no longer be built in the greenhouse, irrigation can be conducted to increase soil and air humidity in the greenhouse. Because the heat capacity of water is large, irrigation can play a certain antifreeze effect. When the outside temperature reaches -4C-3C, the vegetables in the greenhouse will not be frozen.
2, hot water antifreeze. If the greenhouse has a small area, before the onset of the cold wave, several buckets can be filled with hot water, placed in the shed, and protected against cold with hot air. When the outside temperature reaches -5C-3C, vegetables in the shed will not be frozen.
3, smoke protection against freezing. Before the frost, smoke in the shed can increase the temperature around the greenhouse by 1C-2C, and the temperature in the shed can be increased accordingly.
4, heating antifreeze. Where conditions permit, stoves, chimneys, etc. can be used to heat the shed to prevent frost damage.
2, hot water antifreeze. If the greenhouse has a small area, before the onset of the cold wave, several buckets can be filled with hot water, placed in the shed, and protected against cold with hot air. When the outside temperature reaches -5C-3C, vegetables in the shed will not be frozen.
3, smoke protection against freezing. Before the frost, smoke in the shed can increase the temperature around the greenhouse by 1C-2C, and the temperature in the shed can be increased accordingly.
4, heating antifreeze. Where conditions permit, stoves, chimneys, etc. can be used to heat the shed to prevent frost damage.
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