Scientific management measures of disease-prone broilers in winter

broiler breeding

Winter is the most difficult season for broiler breeding, because of the contradiction between ventilation and heat preservation in winter, due to the high density of breeding, too closed heat preservation, resulting in too much CO2 in the house, lack of fresh air, so that the climate environment in the chicken house is very poor, thus inducing a variety of diseases, such as colibacillosis, respiratory disease, ascites disease and so on. Therefore, raising broilers in winter should be managed from the following aspects.

1, reduce the feeding density: in the closed chicken house, due to the respiration of the chicken flock, the oxygen content in the house decreases and the carbon dioxide increases. In the chicken house with heating measures, the humidity is high, the temperature is high, the immunity of the chicken body decreases, and the disease rate increases. Due to intensive breeding, the chance of pathogen transmission through the air increases, and chickens suffer from infectious rhinitis, infectious laryngotracheitis, chronic respiratory diseases, avian cholera and other diseases will increase. If the feeding density is reduced, the chickens are reduced, the oxygen demand is reduced, and the exhaled carbon dioxide is reduced, so that the air pollution index is reduced, thereby reducing the incidence rate.

2, strengthen the chicken house ventilation: breeders into the chicken house feel pungent, dazzling or mild breathing difficulties, must increase the temperature, and slowly ventilate, to avoid excessive ventilation, resulting in local chicken house temperature or the whole chicken house cooling too fast; should avoid cold air blowing directly to the chicken body, to prevent chickens from catching a cold. When the outside air temperature is too low, the chicken house ventilation can be preheated by a warm empty room, and then introduced into the chicken house or heated air can be led to the chicken house through an air duct or a long cloth bag. Under normal circumstances, should be in sunny, windless morning 10:00- 3:00 pm window ventilation, such ventilation is not easy to make the temperature drop too much, but also conducive to fuel conservation. However, at any time, when there is pungent, dazzling gas or breathing difficulties, ventilation must be maintained to keep the air fresh and reduce the occurrence of chicken diseases.

3. Control of chicken house temperature: Temperature is the primary condition for normal growth and development of broilers, and is closely related to temperature regulation, activity, feeding, drinking water, digestion and absorption of feed, disease resistance, etc. The optimum temperature for different growth stages is different. Under normal circumstances, the brood temperature is 33-35℃, and the temperature can drop by 2-3℃ every week until 18-21℃. When brooding, we must master the temperature standard, not too high or too low; to be balanced and stable, high and low in the early stage of growth, gradually decreasing, never high and low, too much change. The basic principle of temperature control is higher in early stage than in late stage, higher at night than in daytime, higher in weak chicks than in strong chicks, higher in strong wind and rain and snow than in normal sunny days, higher in winter and spring than in summer and autumn, higher before and after immunization and during disease of chicks than in normal days, etc.

4. Control humidity of chicken house: the most suitable humidity of broiler house is 60%-70%. The humidity in broiler house is too low. The broiler is sluggish, the feathers are messy, the skin is dry, the beak and claw color are dim, and it is easy to cause dehydration of chicken body, causing respiratory diseases of chicken flock. If the humidity in the house is too high, it will increase the heat emitted by the chicken body and make the chicken colder. In production, it can be taken to sit in the basin on the heat source to increase the humidity, and it can also be humidified by humidifier; strengthen ventilation and put quicklime blocks indoors to reduce the humidity in the house. At 33 ° C dry gauge temperature, the hygrometer temperature should be 28-29 ° C, that is, the hygrometer temperature difference is 4-5 ° C, which can ensure the relative humidity of 65%-70% of the chicken house.

5, do a good job of sanitation and disinfection: the chicken house should be cleaned every day, remove feces and bedding in time, prevent feces and urine stored in the house for too long to produce a large amount of ammonia, causing ammonia poisoning. After the broiler leaves the market, the chicken house should be thoroughly disinfected and empty for 10 days before entering the chicken house. Disinfect the environment around the chicken house once a week, disinfect the chicken spray once or twice a week in the house, and disinfect the utensils such as the feed trough drinking water regularly.

In short, reasonable arrangements for the daily life of chickens, strengthen feeding management, resolutely do not use moldy feed, improve the resistance of chicken bodies; while ensuring the temperature of chicken houses, use adequate sunlight for proper ventilation, increase fresh air in the houses; pay attention to environmental sanitation, do a good job of disinfection, reduce feeding density, and ensure the health of chickens.