The most harmful gas for harmful gases to chickens is ammonia, which stimulates the sensory organs of chickens, induces respiratory diseases, and reduces feed efficiency. When smelling ammonia when entering a chicken house, the ammonia in the house has already exceeded the standard. Houses warmed with coal stoves should beware of carbon monoxide poisoning. When there is an excessive amount of harmful gas, appropriate measures should be taken immediately, such as increasing the ventilation volume and replacing the litter. The suitable temperature for cold-proof hens laying eggs is about 20°C, and the minimum temperature should not be lower than 13°C. If the indoor temperature does not meet the requirements, the temperature difference is too large, it is necessary to artificially add heat to increase temperature. Ventilation In low winter temperatures, people tend to notice only warmth and neglect ventilation. When the air is relatively dirty in the morning, the ventilation should be gradually increased, preferably at a high temperature at noon, and each ventilation time is shorter, and several passes are better. If the chicken is found to be snoring and breathing slightly, the house is full of dust and smells, indicating that the air in the house is extremely dirty and ventilation should be strengthened immediately. However, to prevent the thief wind, generally, elbow type ventilation devices are installed on the leeward surface of the chicken house to prevent the birds from being directly affected by the wind. Humidity relative humidity is suitable for 60% ~ 70%, higher humidity conducive to the survival and reproduction of microorganisms, if accompanied by low temperature will increase the hazard of low temperature. When the humidity is low, the chicken house is dry and it is easy to induce respiratory diseases in chickens. Especially when the chicks are in a dry environment for a long time, they can cause dehydration and dehydration. Attention should be paid to the adjustment of the humidity in the sheds. The litter in the winter is relatively dry, and it is necessary to frequently spray or spray the disinfection.
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