Due to the high temperature and high humidity in summer, the hatching rate of eggs decreased. Through the clinical observation and breeding practice of breeder chickens, the author proposes measures to increase hatching rate of hatching eggs in hot summer season.
Breeder breeding management
(1) Install a wet curtain and reduce the temperature inside the house through negative pressure ventilation.
(2) Place ice cubes in the house to absorb heat and cool down.
(3) The enclosures that do not have wet curtains installed can be cooled by increasing the number of fans, increasing the air convection to the doors and windows, spraying the open air on the chicken farm, and spraying the water on the roof of the roof.
(4) Dehumidify and cool by diligent cleaning, anti-leakage, lime-spraying, etc.
(5) install sunscreen, open the skylight, plant a tall tree, plant climbing tiger and other cool.
(6) Add 0.1% to 0.4% of vitamin C in drinking water or add 0.1% to 0.3% of sodium bicarbonate and other heat-resistant drugs in feed to enhance body resistance. At the same time, the amount of multivitamins and trace elements in the feed should be appropriately increased.
Egg collection and storage
(1) Egg collection. In the summer, eggs are collected once every 1 to 2 hours, and the shelled eggs are picked out. After being fumigation-decontaminated with 28 ml of formalin and 14 g of potassium permanganate in the sterilization box, the eggs are placed in stock. The suitable temperature for storing eggs is 10~18°C, and the relative humidity is 70%~80%.
(2) When storing eggs, heads should be down, summer egg bank can be installed with air conditioning, can not build air-conditioned conditions can be built basement, save egg no more than 1 week, do not turn the egg; more than 1 week, turn the eggs 1 ~ 2 times, 45 degrees per egg turn to prevent sticking.
Improve hatching conditions
(1) Air-conditioning or ventilation fans should be installed in the summer incubation room to reduce the temperature and humidity of the incubator.
(2) To maintain a suitable humidity environment, suitable humidity can make the early embryos heat evenly, good heat dissipation in the later period, chicks easy clam shell. Practice has shown that eggs lose 12% to 13.5% of weight in the first 19.5 days of hatching, and hatching results are best. The automation and intelligence of modern incubator equipment has greatly reduced the operational strength and risk in ventilation and turning the eggs, but it is still necessary to pay attention to adjust the damper selector switch in time to ensure uniform humidity.
(3) It is advisable to stop the normal operation of the egg-turning system with 16 embryos, and it is necessary to constantly check if there is any phenomenon of overturning, pilfering, or turning over, so as to adjust in time.
(4) Before hatching the chicks, the temperature should be lowered to 36.8~37.3°C and the humidity should be controlled between 70% and 75%. This will help prevent the adhesion of the villi to the shell membrane, and it may also promote calcium carbonate in the eggshell. Made of calcium bicarbonate, crisp shell, easy to hatch chicks. At the same time increase the amount of ventilation.
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