Staying warm is essential for pigs during the cold season, especially in plastic greenhouses that often lack proper insulation. Due to low winter temperatures, limited sunlight, and large temperature differences between the inside and outside of the shed, condensation frequently forms on the plastic film, reducing its insulating effect. To address this issue, first, cover the roof with a layer of straw or similar material at night to improve heat retention. Second, using double layers of plastic film can significantly enhance insulation. Third, managing the pigs' habits by encouraging them to defecate and urinate in fixed areas helps reduce moisture buildup. Fourth, raising more pigs per pen increases body heat, which naturally warms the environment. Fifth, laying dry grass on the floor of the pig house provides additional warmth and comfort. Lastly, regularly inspect the plastic film for holes and repair them promptly to maintain its effectiveness.
In enclosed greenhouses, humidity can become a major problem as it doesn't evaporate easily. High moisture levels inside the shed can lower the perceived temperature, making it feel colder for the pigs. To manage this, first, ventilate the shed daily based on weather conditions—open the sunroof and vents between 10 am and 2 pm when it's warmer, for about 30 to 60 minutes each time. Ventilation should be longer on sunny days and shorter on cloudy days. Second, installing air conditioners or fans can help regulate humidity. Third, regularly changing the bedding helps absorb excess moisture, and adding dry ash or soil can also aid in moisture control. Fourth, wipe down the plastic film with an absorbent cloth to remove water droplets and reduce humidity. Finally, ensure the concrete floor has a slight slope so waste flows into the drainage pit and can be removed quickly.
Harmful gases such as ammonia, hydrogen sulfide, and carbon dioxide can accumulate in the greenhouse due to pig respiration, waste, and decomposition of feed and bedding materials. These gases can lead to health issues in pigs if not properly managed. To prevent this, first, open the vents and sunroof regularly to allow fresh air in and harmful gases to escape. Second, clean pig manure and urine thoroughly every day, especially in the morning, afternoon, and evening, to maintain cleanliness and dryness in the shed. Third, keep feeding equipment like troughs and sinks clean by washing them with hot water regularly and avoid leaving leftover food that can rot and produce bad odors. Additionally, separate tools and utensils, and perform regular disinfection of all surfaces and equipment to eliminate foul smells and ensure good ventilation, ultimately improving the pigs’ immunity and overall health.
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