Prevention of Cold Stress in Broiler Breeding in Spring

In early spring, the climate is cold, the temperature is fickle, and the chickens are vulnerable to cold and cold stress. Cold stress results in decreased egg production, reduced feed conversion, and even respiratory disease. If the temperature is too low, chicken cocks, flesh and chicken feet will also be frosted.
In the early spring, chickens often huddled in cold henhouses, resisting the cold by decomposing the heat generated by their body fat, or increasing their intake to adjust themselves. This not only reduces the body size of the chicken, but also reduces the feed conversion rate. Therefore, it is the top priority for the early spring feeding and management to do a good job of protecting the cold and heat insulation of chicken coops in the early spring. The specific approach is:
If the roof of the chicken house and the northern wall are found to be frosted, the insulation sheds should be increased. Use plastic sheeting or tar paper to increase the temperature barrier and block the north window. Wind barriers can also be set in the main wind direction to the proper place of the house to ease the cold wind. The most suitable temperature for chicken egg production is 18~23°C, and the ideal temperature is 21°C. If it is lower than 13°C, the egg laying rate of laying hens will decrease; if it is lower than 12°C, the growth and development of broilers will be seriously hindered. When the temperature is low, the fan speed can be reduced, reducing air circulation.
Adjust the feeding amount according to the temperature. Chickens of the same condition have different energy requirements under different temperatures. In the early spring, broiler breeders can feed 150 to 170 grams of feed each day, increasing the feed heat energy to 12.1 to 12.3 MJ, which can meet the needs of the chicken body. In case of cold currents, the temperature suddenly drops, and the chickens themselves cannot adjust the feed intake all at once. It will produce a great deal of stress. Therefore, attention should be paid to the weather forecast at any time. Adding 10 to 20 grams of feed to each chicken 1 to 2 days before the cold current starts, and feeding it continuously for 3 to 5 days, the chickens can get 112.86 to 142.12 kJ of heat to maintain Body temperature and egg production levels. Every 3°C drop in temperature, each chicken should be fed about 5 grams. After the cold current passed and the temperature rose, it resumed the original feed intake. At the same time pay attention to the quality and quantity of various amino acids. Increase the proportion of energy feed in the feed and appropriately reduce the protein content.
In early spring, in order to keep warm, doors and windows are often closed, resulting in increased moisture within the house; ammonia, hydrogen sulfide, methane, etc. are doubled; dust and microorganisms exceed the hygiene standards of the house. Light on the chicken's feather growth and unfavorable to the feet, severe cases can easily lead to respiratory diseases, broiler ascites syndrome. Therefore, a certain amount of airflow should be maintained in the early spring chicken house so that the concentration of ammonia gas, hydrogen sulfide, and carbon dioxide in the chicken house can reach the hygienic standards of the house.

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