To protect crops during cold weather, a multi-layer film can be covered with additional layers such as heat-insulating films, small sheds, or cover films. Non-woven fabrics may also be used to provide an extra layer of insulation over the existing structure. These measures help to maintain a stable temperature inside the greenhouse and reduce heat loss.
In addition, insulating materials like grass curtains or straw mats are placed around the outer layer of the greenhouse. This not only enhances the insulation effect but also improves the buffering capacity against external temperature fluctuations, making the environment more stable for the plants.
During cold spells, a heating furnace equipped with a proper exhaust pipe is often used to provide warmth. It's crucial to ensure that the exhaust system is tightly sealed to prevent smoke leakage, which could harm the vegetables and affect their growth.
At the same time, watering the fields plays an important role in cold protection. By filling the soil with water, it helps to store heat energy, which can be released gradually during the night. This method effectively reduces the risk of frost damage. Additionally, using electric heating systems or applying warm organic fertilizers can further raise the soil temperature and support plant health during harsh conditions.
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