Technical Measures to Improve the Breeding Rate of Breeders

To provide full-priced compound feeds, properly process and store feeds to meet the normal growth and development of laying hens and the nutritional needs of egg production, and to maintain good body conditions. In particular, crude protein, calcium, phosphorus, zinc, manganese, vitamin A, vitamin D, vitamin E, vitamin B2, etc., must be supplied according to the standard of feeding.

Strengthen the management of breeder chickens to ensure proper temperature, good ventilation, and clean grassland; attach importance to the prevention and treatment of chicken diseases, strictly implement the epidemic prevention procedures, prevent the occurrence of diseases; reasonably arrange the proportion of male and female chickens to ensure the species Roosters have a strong fertility, increase the fertilization rate of eggs, and thus improve the hatching effect of chickens.

Scientific storage and selection of eggs

First, science storage eggs

1 The suitable temperature for keeping eggs is 8°C-18°C. The temperature is slightly higher in the first few days. As the preservation time is extended, the temperature should be gradually reduced.

2 The relative humidity of preserved eggs is 75%-80%.

3 Pay attention to the ventilation in the egg store to ensure that the air inside the store is fresh and free of special odors.

4 When eggs are kept for no more than 1 week, do not turn the eggs; over 1 week, turn the eggs once or twice a day, turning eggs 45 degrees each time to prevent sticking. Studies have shown that eggs can be incubated at 37°C for 1 hour or at room temperature for 2 hours to 4 hours after egg production to improve hatching.

Second, strict selection of eggs

A flock should have stable genetic performance, high health, no infectious disease, normal feeding and management, and high fertilization rate.

The better the fresh eggs, the longer the storage time and the lower the hatching rate. The time for keeping eggs is no more than 7 days in spring and autumn, 5 days in summer and no more than 10 days in winter. After hatching eggs, it is best to hatch within 3 days to 4 days.

The egg shells of the 3 kinds of eggs should be fine and uniform, moderate in thickness, and must be removed from thick preserved eggs, brown eggs, and cracked eggs. The surface of the eggshell should be clean and should not have feed, feces, soil, and egg contents.

The quality of the 4 kinds of eggs is better. When using the lights, we should choose eggs with deep egg color, slow rotation, and small rotation range; stick eggs with shells, yellow eggs with scattered eggs, and eggs that are not at the big end of the air chamber should not be used for hatching.

5 The egg weight should be 55 g-65 g; the shape of the egg is elliptical and the egg type index is preferably 74%. Eggs, too big and small eggs, and misshapen eggs within the first 2 weeks of production are generally not suitable for hatching. If the eggs are of different sizes, they can be hatched in batches of the size of the eggs.

Third, provide suitable incubation conditions

1 Incubation temperature: Temperature is the most important condition for hatching. Only at a suitable temperature can the normal material metabolism and growth of the embryo be ensured. The suitable incubation temperature is 37.5°C-37.8°C. The constant temperature incubation method can be used for the temperature: 3 days at 1 day to 19 days, and 37.5 degrees at 20 days to 21 days. The temperature in the incubation chamber is required to be 22°C-26°C. If the room temperature is low and cannot be increased, the incubation temperature should be increased by 0.5°C-0.7°C; if the room temperature is high and cannot be decreased, the incubation temperature should be lowered by 0.2°C-0.6°C. Before incubation, try tempering and tempering so that the temperature in each part of the incubator (machine) is uniform and meets the standard; hatching conditions should be checked frequently for timely adjustment. When hatching in batches, new and old eggs should be placed at intervals so that the temperature can be evenly distributed. In order to prevent the temperature difference within the incubator, it is possible to increase the number of flops during incubation and adjust the temperature.

2 Ventilation and ventilation: Ventilation and ventilation are very important. Especially in the late post-incubation period, the metabolism of the embryo is increased, and the amount of heat generated is large, requiring a large amount of oxygen. In the hatching operation, the inlet and outlet of the incubator were all closed in the first week; at the 7th embryonic day, they were each opened to 1/3; at the 10th embryonic day, they were each opened at 1/2; at the 12th embryonic time, they were each opened at 2/3; from the hatching Open all 3 weeks. However, the temperature of the incubation chamber should be maintained at 20°C-25°C. Generally after the inspection of egg and turntable, the air inlet and outlet are all closed; when the temperature rises back to normal, the air hole is restored to the level that should be closed and opened.

3 Grasp the key period: 1 Embryo age -7 embryo age and 18 embryo age -21 embryo age are the two key periods in hatching. In the early stage, eggs can be preheated before hatching, the air inlet and outlet can be closed, and the eggs can be hatched after 5 embryos and 6 embryos, and the temperature of the hatching chamber can be increased. In the later period, the hatching temperature should be reduced by 0.3°C-0.5°C; the hatching humidity should reach 65%-70%; the relative humidity in the hatchery room should be 75%; the ventilation should be increased; the turntable should be carried out at 19 embryos; after the 1/2 chicks are hatched Carry out the first picking and pay attention to the handling of chicks after hatching.

Fourth, strengthen health and disinfection work

Hatchery Hygiene shall implement the isolation operation of the egg testing room, the egg storage room, the egg disinfection room, the incubator room, the hatching room, the chick storage room, and the chick releasing room, and flow in a sequence to reduce and avoid the infection. Always clean and disinfect tools to keep the hatchery clean and fresh.

Eggs should be fumigated 2 times before and after sterilized egg collection before and after hatching. After the turntable, hatchers should be disinfected. We must also strengthen the work on rodents and flies to reduce pollution.

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