The following measures can be taken: 1. Know how to ventilate the house and use it skillfully. Horizontal negative pressure ventilation, because the fan installed in the side wall and gable position is different, so that the static pressure in the chicken house, the size of the air inlet, wind speed, wind direction are different, in production management to be treated differently, the wind speed inside the house to 0.1 m/s is appropriate. 2. Prevent cold wind from hitting the chicken body. The cold wind in the house may come from cracks in the doors, windows, etc., sometimes the local wind speed can reach 5-6 m/s, and it must be tight; sometimes the cold wind comes from the manure outlet of the dunghill, and flue openings should be installed at the outlet of the dung to protect the cold. 3. The open chicken house is best equipped with a wind barrier in the northwest to prevent the northwest wind from hitting the chickens. The chicken house can be closed on the north window and hang the cotton curtain on the door of the chicken house. 4. In extremely low temperature conditions, the small inlet window can be opened one at a time and the opening is controlled at the lowest level. Appropriate row of gusts when cleaning, every 10 to 15 minutes. Since the optimum temperature for laying hens is 18~25°C, if the temperature drops below 13°C, the egg production rate will begin to decline, and the duration of low temperature will be too long, which will also cause upper respiratory tract diseases. Therefore, the open chicken house can open the sunny window after 9am, illuminate the sun, regulate the temperature, and look at the weather in the afternoon to close the doors and windows promptly. 5. The winter broiler house is mainly insulated and supplemented with ventilation. During the day, according to the air quality in the house, intermittent ventilation can be adopted. If conditions permit, the temperature controller can be installed in the house, and the opening and closing of the fan and the small window can be adjusted according to the set target temperature, which can effectively solve the contradiction between ventilation and heat preservation.
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