When chickens are cold, they will break down fat and resist early spring. How to prevent cold stress in broilers?

The weather changes greatly in early spring, broilers are vulnerable to cold air attack and disease, farmers need to do a good job of broiler cold stress protection, to prevent a large number of disease. When the chicken is cold, it will huddle together and resist the cold by breaking down the fat in the body to produce a large amount of heat, or increase its feed intake to regulate itself. This not only consumes physique, but also reduces feed conversion rate. Therefore, it is a top priority to do a good job of cold prevention and heat preservation in early spring. The details are:

Broiler

1. Increase the thermal insulation layer of the chicken house.

If it is found that there is frost on the roof and north wall of the chicken house, the hanging shed of thermal insulation layer should be added, and the thermal insulation layer should be increased with linoleum or plastic sheeting to block the north window. A wind barrier can also be set up in the appropriate place where the main wind direction is away from the chicken house to alleviate the cold wind. The optimum temperature for laying eggs in the henhouse is 18: 23 ℃, and the optimum temperature is 21 ℃. The egg production of breeder chickens decreased when it was lower than 13 ℃, and the growth and development of broilers was hindered when it was lower than 12 ℃. When the temperature is low, the speed of the fan can be reduced and the air flux can be reduced.

two。 Pay attention to ventilation.

For heat preservation in early spring, windows are often closed and doors are closed, resulting in dirty air, increased moisture, moist bedding, doubling of ammonia, hydrogen sulfide, carbon dioxide, methane, faeces, etc., and excessive dust and microorganisms. The light ones are disadvantageous to the feather growth and feet of chickens, and the serious ones are respiratory diseases, ascites disease of broilers and so on. Therefore, in early spring, the chicken house should maintain a certain air flow speed (0.1 / 0.2 m / s), so that the concentration of ammonia in the chicken house does not exceed 200 mg / kg, hydrogen sulfide does not exceed 10 mg / kg, and carbon dioxide does not exceed 0.5%, reaching the hygiene standard of the chicken house.

3. Adjust the feeding amount timely according to the air temperature.

For chickens in the same condition, the energy requirements are different at different temperatures. In early spring, broiler breeders can eat 150-170 grams of feed every day, raising the feed heat energy to 12.1-12.3 megajoules, which can meet the needs of low temperature heat energy. In case of a cold spell and a sudden drop in temperature, the broiler itself can not adjust its feed intake at once, which will produce a great stress reaction. Therefore, we should pay attention to the weather forecast at any time and add 10 grams of 20 grams of feed to each broiler 1-2 days before the cold spell for 3-5 days, so that the chickens can get 112.86-142.12 kilojoules more to maintain their body temperature and egg laying level. For every 3 ℃ drop in temperature, about 5 grams should be added. After the cold spell passes and the temperature picks up, the original feed quantity will be restored. At the same time, special attention should be paid to the quantity and quality of various amino acids. Increase the proportion of high-energy feed in the feed and reduce the protein content appropriately.