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Temperature is the primary condition for poultry embryo development. The requirements for temperature conditions are basically the same for poultry embryo development at different stages.
Duck and goose eggs are large in size, small in surface area per unit weight, and their heat dissipation capacity is worse than that of chicken. Therefore, the eggs must be cooled during the second half of incubation. The specific methods are as follows:
During the whole incubation period, chicken breeding eggs need to be operated and managed by a human certificate. However, according to the characteristics of embryo development, there are two key periods: 1-day embryo age to 7-day embryo age and 18-day embryo age to 21-day embryo age. In the incubation operation, we should try our best to create the incubation conditions suitable for the development of embryos in these two periods, that is, we should grasp the main contradiction between improving the hatching rate and the quality of chicks. Generally, pay attention to heat preservation in the early stage and ventilation in the later stage.