Preheating brooding means that the temperature in the brooding room is raised to 34°C to 36°C by warming and warming methods 2 days before brooding. So what significance does preheating have?
First, the low temperature of brooding houses on the hazards of chicks
1. Cause the chicks to get together: The temperature in the house should be maintained at 33°C～35°C when the brood is started. When the temperature is low, the chicks are likely to get together and cause the chicks to squeezing and causing disability and death. It can also directly cause the chicks to reduce the feed intake.
2. Respiratory diseases: Low temperature, cold air can stimulate the chicken's respiratory mucosa, induce respiratory disease, chicks showed "snoring, coughing, sneezing" symptoms.
3. Induced dyspepsia: When the temperature of the brooding room is low, the digestive ability is reduced due to the fact that the chicks do not love activities, drink less, and weaken the secretion function of the digestive system, thereby causing indigestion diseases, and the disease mainly manifests as Lard, diarrhea, and feces contain undigested feed.
4. Abnormal absorption of yolk: Under low temperature conditions, due to small activity of chicks, decreased feed intake, weak endocrine function and other factors make the egg yolk absorb poorly, long time yolk malabsorption because the chicks can not get enough maternal antibody decrease in immunity.
5. Immunization produces less antibodies: Due to reduced nutrient intake in chicks at lower temperatures, the development of the immune system is slow, and when immunized, fewer antibodies are produced.
Second, the significance of preheating
1. Preheating can avoid the indigestion, poor absorption of yolk, lethality, diarrhea and respiratory diseases and other hazards brought about by the low temperature in the house, so as to improve the survival rate, growth rate, health level and evenness of the chicks.
2. Preheating 2 days before brooding can allow excessive moisture in the walls, stove, floor, and utensils of the house to evaporate as soon as possible to accelerate convection and speed up the circulation of the house and outside air. The water vapor and the bad gas in the chicken house are the fresh air outside the house, creating a comfortable living environment for the chicks.
Preheating can prevent smoke stimuli, carbon monoxide poisoning, or fire from rising temperatures after the chicks are introduced. Because brooding is mostly done with a stove or an electric stove, the temperature of the stove, wall, or floor is too high when heated by a stove. It is prone to produce more smoke and moisture. These fumes can induce related chicken respiratory diseases and inflammation of the eye conjunctiva. When heated by an electric furnace, it may cause fire due to prolonged use of high-power electrodes.
4. Preheating can effectively test the reliability of the performance of warming and warming facilities and equipment. It can make time for maintenance in case of unreliable performance and avoid the temperature in the brooding room due to the fact that it cannot be warmed or kept warm during brooding. Too low to bring about the corresponding adverse reactions.
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