Key points of chick hatching technology

1. Equipment disinfection and testing. Before incubation, the incubator, incubation room, egg tray, hatching tray, etc. should be thoroughly cleaned and disinfected, and the eggs should be fumigated and disinfected, and the inspection and maintenance of various equipment such as the incubator should be done well.

2. Preheat eggs for incubation. The eggs placed in the air-conditioned egg storeroom are moved to a room at 22-25 ° C for 6-8 hours to remove water vapor from the egg surface. After the egg surface temperature reaches room temperature, the eggs are incubated.

3. Control the temperature. Temperature is the primary condition for the development of chicken embryos. Temperature control should be stable during incubation to prevent high and low temperatures. The incubation period of the chicks is 21 days: the incubation temperature is 38.5 ° C for 1-6 days, 38 ° C for 7-14 days, 37.8 ° C for 15-18 days, and about 37.4 ° C for 19-21 days.

4. Control humidity. By controlling the humidity, the embryo can be heated uniformly in the early stage, which is good for heat dissipation and shell pecking in the middle and late stages. In general, the relative humidity is 60-70% for 1-7 days, 50-55% for 8-16 days, and 65-70% after 17 days.

5. Ventilation. Chicken embryo development must constantly exchange gas with the outside world, especially in the late incubation period, when the embryo begins to breathe, oxygen demand increases, and carbon dioxide emissions increase. At this time, ventilation should be increased to keep the air fresh.

6. Take photos in time. The purpose of taking eggs is to check the developmental status of embryos in time, and to remove imperfect, dead and broken eggs. Generally, the head shot of white-shell eggs begins on the 6th day of incubation, and the brown-shell eggs begin on about 7-10 days; the second shot usually takes place at 19 days of age. The lane-type incubator is usually used to illuminate the eggs once at the age of 19 days.

7. Move the disk at the right time. The process of moving from the egg tray of the incubator to the hatching tray or sending it into the hatching machine to continue hatching is called transferring the tray. The time for transferring the tray is that the embryo hatches to 19 days of age or 1% of the eggs are slightly pecking During hatching, keep the hatching device dark to ensure that the chicks in the shell are quiet.

8, emergence. Generally, chicks with normal development start to hatch after 20 days. During the hatching period, the light in the hatching device should be turned off to keep the chicks in the shell quiet. The selection of chick selection time generally chooses to remove empty eggshells and chicks with dried fluff when 60% -70% of the chicks are out of the shell. In the later stage of hatching, for the chicks that have difficulty in shelling, you can gently peel the adhesion of the dried yellow embryo on the egg membrane, and pull out the head, neck, and wings to let them out of the shell by themselves. After the hatching is finished in 21 days, the water tray and hatching tray should be drawn out, the incubator should be cleaned, thoroughly washed, disinfected and dried, and ready for the next use.

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