Measures to Improve Summer Hatching Performance of Eggs

Doing a good job of summer hatching management of eggs, reducing the impact of hot weather on hatching rate and the rate of hatching and improving the utilization rate of eggs, this is the key to obtaining high and stable production of hatching eggs and obtaining good economic benefits. To this end, the author will discuss how to do a good job in the management of summer hatching production of eggs. 1 to strengthen the storage of eggs, eggs to improve the quality of egg preservation temperature is suitable for 13 ~ 18 °C, but in hot summer, the ambient temperature often reaches above 33 °C, sometimes up to about 38 °C, so high outside temperature (critical for chicken embryonic development The temperature is about 23°C), which stimulates the activity of various enzymes in the egg and promotes embryonic development. Therefore, after the eggs are produced, they should be harvested and disinfected in time and sent to an incubator with air conditioning equipment. Otherwise, the eggs that stayed in the broiler house will begin to grow overnight, and will wait until the second day to send eggs to the hatchery for a low temperature (18°C). When left and right) were stored, the embryos that had just sprouted died after being subjected to cold stress, resulting in a high rate of stillbirth in the early period, embryonic development of the chicks, and an increase in weak embryos. In summer, due to high temperature, high rainfall, and high humidity, high temperature and high humidity provide the conditions for the growth of bacteria on the surface of the eggs. When the eggs are stored for more than one week, they will grow moldy spots and affect the quality of the eggs. Therefore, the eggs collected every day should be disinfected in a timely manner, and the egg bank should be kept in a ventilated place, and the relative humidity should not exceed 80%. It is best not to save eggs for more than 1 week. 2 Scientifically arrange the disinfection time of eggs. In the hot summer season, the ambient temperature has exceeded the critical temperature for the development of chicken embryos. After the eggs are produced, although the chicken embryos develop slowly, they do not sleep. From egg production to collection to storage in the hatchery, eggs are generally grown for more than 24 hours. At this time, it is the formation period of important vital organs and tissues such as the heart, nerves and brain of chicken embryos. Disinfectant or steam has a great influence on it. At this time, most hatcheries need to fumigate the preserved eggs with formalin in order to prevent the later hatchery from having more eggs and sterilize steam, which will weaken and kill some of the embryos that have developed about 24 hours of embryonic age. Head shot stillbirth rate increased. If the disinfection is too late, it will lead to a large number of bacteria, bacteria invade the breeding eggs will also cause embryos to die. In view of the above situation, in midsummer, it is required to receive eggs several times a day, transport them in time and disinfect them as soon as possible. The correct approach is to collect the eggs and soak them in the disinfecting solution, send them to the incubator and place them in the rack, transfer them to the egg bank for 30 minutes, and then send them to the egg bank at 20°C for storage. After hatching, 3 embryos are sterilized with formalin for the first time. 12 Embryos were formalin-treated for the second time, and 19 embryos were plated and discarded with a half-dose of formalin for the third disinfection. 3 Use batch temperature incubation, correctly grasp the hatching technique Because of the high summer temperatures, the temperature in the incubation chamber is up to 35°C. If you adopt the whole batch of variable temperature hatching method, not only the preservation time of the egg is long, but also the temperature of the embryo protein in the late incubation period is too high. temperature. In addition, most hatchery incubators do not have a cooling system, or the cooling effect is not good. There is no cooling system in the hatchery room, and the temperature and overtemperature of the embryonic eggs cannot be controlled at a later stage. The use of batch temperature incubation method, so that the new eggs and old eggs staggered, the use of pre-embryonic egg heat absorption, late heat regulation to adjust the temperature, not only can effectively avoid the phenomenon of overheating temperature, but also shorten the shelf life of eggs, is conducive to Improve the hatching rate of eggs. From the standpoint of hatchery production in various regions, the hatchery has a high hatching rate in the normal season, but the hatching rate starts to decline after entering the summer. In addition to the low fertilization rate and poor storage conditions of the eggs, one of the important reasons is that the hatching eggs are Inadequate technology management in the incubation process, especially in the majority of ventilation problems. When hatching in summer, under the premise of maintaining the normal temperature, it is necessary to increase the ventilation of the embryos in the later period. Because of the need to continuously exchange gas with the outside world during embryonic development, and as the embryonic age increases, especially to the 19th day of incubation, the embryo begins to breathe with the lungs and its oxygen consumption increases. At the same time, the increase of ventilation during the later period of incubation will help disperse the physiological excess heat of the embryo and prevent embryonic death caused by overheating. In order to prevent the overheating of overheated oxygen in summer from being insufficient, the following three measures may be taken: 3.1 When the room temperature is above 35°C, the air volume should be driven to the maximum position according to the development of the embryo for 14 days. The hatch of the incubator opens a slit, and the size of the slit increases with the age of the embryo. 3.2 If necessary, remove the cooling fan blade cover to increase ventilation. Some incubators have two air inlets and cooling ducts to prevent later over-temperature. The cooling fan is normally closed and is only opened under negative pressure when the cooling motor is started. In order to increase ventilation in summer, the cover of the cooling fan can be removed, which is equivalent to adding an air inlet. 3.3 Start the humidifying plate and cool it with water. Egg hatching management is a meticulous task. In addition to doing the above work, it is also necessary to pay attention to the regular look at the fetus, according to the development of the embryo, scientific and reasonable adjustment of temperature and ventilation, to ensure that hatching production can be obtained during the summer season good effect.

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