In this article, let us continue to learn how chicken farms can improve the hatchability of breeders, and how to scientifically store and select breeding eggs.
2. Scientific storage and selection of eggs
Scientifically store eggs
①The suitable temperature for storing hatching eggs is 8℃~18℃, slightly higher in the first few days, and the temperature should gradually decrease with the prolongation of storage time.
②The relative humidity of the egg is 75%~80%.
③ Pay attention to the ventilation in the egg storehouse to ensure that the air in the storehouse is fresh and has no special smell.
④When the eggs are kept for less than 1 week, there is no need to turn the egg;
For more than 1 week, turn the eggs once or twice a day, and turn the egg at 45 degrees each time to prevent the occurrence of sticky shells.
Studies have shown that placing eggs at 37°C for 1 hour or at room temperature for 2 hours to 4 hours after laying egg can improve the hatching effect.
Strict selection of breeding eggs
① Breeding flocks should be stable in genetic performance, healthy and high-yielding, free of infectious diseases, normal feeding and management, and high in fertilization rate of breeding egg.
②The fresher the egg, the better, the longer the storage time, the lower the hatching rate.
The storage time of eggs: no more than 7 days in spring and autumn, no more than 5 days in summer, and no more than 10 days in winter. The eggs hatch within 3 to 4 days after they are laid.
③ The eggshell of the hatching egg should be meticulous and uniform, with moderate thickness. Thick preserved eggs, sand-preserved eggs and cracked eggs should be removed; the surface of the eggshell should be clean, and should not be stuck with feed,etc.
④The quality of the egg should be better. When viewed with light, the egg with dark yolk color, slow rotation and small rotation range should be selected;
while shell egg, loose yolk egg, and egg with air chambers not in the big end should not be used for incubation.
⑤ Egg weight should be 55 grams to 65 grams; the shape of the egg is oval, and the egg shape index is preferably 74%.
Generally, egg that are too large or too small and deformed eggs within the first 2 weeks of laying are not suitable for hatching.
If the egg are of different sizes, they can be hatched in batches according to the size of the egg.