What is the incubation temperature of eggs?

38.5°C for days 1 to 6; 38°C for days 7 to 14; 37.9°C for days 15; and 37.3 to 37.5°C for days 16 to 21.

Eggs need a certain temperature to hatch. It is generally accepted that a chicken's physiological zero is about 23.9 degrees Celsius, and chicks will hatch at temperatures between 35 and 40.5 degrees Celsius.

In the early stage of incubation, the relative humidity is required to be maintained at 60% to 70%; in the middle and late stages, the relative humidity is required to be maintained at 50% to 55%; and in the shelling stage, the relative humidity is required to be maintained at 65% to 70%

The incubation period is 21 days.

Extended information:

Increase in the number of incubation days p>Factors affecting hatching:

Chicken embryos in the process of development, gas exchange must be carried out, especially in the 19th day of hatching (summer but also 12 hours earlier), the embryo began to lung respiration, oxygen demand gradually increased, carbon dioxide discharge also gradually increased.

At this time, if the ventilation is poor, the incubator is caused by a serious lack of oxygen, even if the shell of the chick to increase the amount of respiration of 2-3 times, but still can not meet the need for oxygen, the result is to inhibit the cellular metabolism.

To make acid accumulation in the body, the organization of carbon dioxide partial pressure increases and metabolic respiratory acidosis, which leads to a decline in heart output, myocardial hypoxia, necrosis, heartbeat disorders and beating arrest.

The oxygen consumption of each embryonic egg during the whole incubation period was measured to be 4-4.5L, and the carbon dioxide discharged was 3-3.5L. Tests proved that if the oxygen content in the incubator decreased by 1%, the hatching rate would be decreased by 5%; the carbon dioxide content around the embryonic egg should not exceed 0.5%, and the embryonic embryonic development would be delayed when carbon dioxide reached 1%, the mortality rate would be increased, and there would be more malformations.

The normal amount of oxygen in the air can be maintained at 20%-21%. Therefore, the key to ventilation is to try to reduce the concentration of carbon dioxide around the embryonic eggs, and the effect of ventilation and air exchange with the structure of the incubation equipment, the architectural design of the incubation hall (room), as well as the environment inside and outside the incubator.

Comparing the factors affecting the hatching rate, temperature is the first, followed by ventilation should be considered. Why many books by temperature, humidity, ventilation .... Sorting, rather than temperature, ventilation, humidity? The reason is very simple, artificial incubation method modeled after the mother bird holding eggs.

Mother birds holding eggs in a dry place, birds more in the trees, the number of incubation is not much, so the ventilation of the matter do not have to take too much into account; artificial incubation is different, the capacity of modern incubators in the thousands of tens of thousands of eggs, so that the ventilation appears to be an important to be, and, the first few years of many experiments have proved that anhydrous incubation does not affect the hatch rate or not too much impact.

The old incubator mostly existed in the number of fans, low speed, the distribution of unreasonable and other shortcomings, not only air exchange is not complete, there is a dead end, but also can not be heat source heat as soon as possible and uniformly sent to the various parts of the incubator, so that the temperature difference between the large. For this reason, should be remodeled or replaced with a new incubator.

Reference:

Baidu Encyclopedia-Chicken Hatching Technology