Ducks and gooses are bulky, and their surface area per unit weight is small, and their ability to dissipate heat is poorer than that of eggs. Therefore, eggs must be cooled in the latter half of incubation. The specific method is as follows: When hatching with an incubator, the machine should open the door twice a day, draw the egg tray with 18 to 24 days of incubation from the rack 2/3, transfer the tray to the hatching from 25 days, and cool the eggs every day. 2 times, pull out the egg tray at intervals. If the egg is too high, the egg tray is pulled out of the machine and allowed to cool before being fed into the machine. The average cold egg time is 30-40 minutes each time, depending on the actual situation. When using 2 incubators for hatching, the first 1 to 15 days in a machine hatch, the temperature 37.7 Â°C, humidity 65%, do not cool eggs; the first 16 to 26 days in the B hatch, temperature 37.5 ~ 37.7 Â°C, humidity 50%, Every day, the egg tray is pulled out of the machine to cool eggs, and the water is sprayed twice. After 26 days, the eggs are transferred to the hatching tray of the machine to hatch. In order to reduce the labor when cool eggs, after 16 to 17 days of incubation, to strengthen the ventilation method, you can discharge the excess heat in the egg, but also to meet the need for embryonic ventilation.
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