1, egg disinfection. Before hatching, the necessary eggs must be disinfected. Through disinfection, it is possible to avoid the invasion of Salmonella, Escherichia coli, dysentery and Other pathogens into embryos and damage the growth of chicks. Usually used soaking method: use plastic bucket or pot to hold 10 kilograms of clean water, put 0.5 grams of potassium permanganate, the water immediately pale purple, and then add 30 milliliters of formaldehyde (formalin) dubbed disinfectant solution. Pour the eggs and immerse them, and then remove them after 1 minute. When the aqueous solution has a fading change, 0.1 g of potassium permanganate may be added successively. 2, correct temperature. Shi Wen principle: "two high, the middle low," "Winter high summer low Chun Qiuping." Here the so-called "high", "low" is relatively speaking. For example, black phoenix chicken, pheasant and other eggs require an average temperature of 38 °C, "high" to 39 °C, "as low as 37 °C. 3, suitable humidity. In the hatching process, through the control of humidity, can effectively regulate the eggs The rate of weightlessness allows the normal development of embryos, and humidification should follow the principle of “high in the front and in the back and low in the middle.†In the “early periodâ€, that is, within the first third of the entire process, the embryo develops, the cells differentiate slowly, and the humidity should increase to reduce the moisture. Evaporation: In the final stage, the embryos that have been sealed will enter the lungs for breathing within 2-15 days, the metabolism will be strong, and the amount of waste gas will be excreted. Only by increasing the air humidity in the incubator can the excretion efficiency be increased, and the development will be satisfied. In the medium to mid-late period, the humidity in the incubator is relatively low and the weight of the incubator is relatively low, so that the standard of the temperature is 50 to 55% relative humidity, 60 to 80% for "high" and 35 for "low". 45%, depending on the difference of incubating eggs 4. Well ventilated, every 1% decrease in oxygen content in the hatchery, the hatching rate is reduced by about 5%, and the hatching rate drops sharply when the carbon dioxide content exceeds 1.5-2. Low oxygen consumption, ventilation should be reduced; incubation In the later period, the amount of oxygen consumption is large, ventilation should be increased, but it should also be noted that too much ventilation will reduce the humidity, we must strengthen the humidification measures.5, turn the egg cycle and the angle.The best turning cycle is every 2 hours Turn over 1. Turn the egg to an angle of 90 degrees (5 degrees), with the head facing upside down and standing upright, and after the first third of incubation, stop turning the egg and let it fall naturally. Normally hatched to 3.5 days after the beginning of the combined water spray to dry the eggs, 1-2 times a day, and the end of the tray out of the cabinet spray 40 °C warm water, let it cool to the egg temperature 35-36 °C, the end of the hatching machine Within the rapid temperature rise to continue to hatch.7, according to the egg, according to the egg generally in the first 3-5 days after hatching and 7 days before hatching, promptly remove the zygomatic and dead fetus eggs, check embryo growth and development status.In order to timely check the embryo The change of the air chamber and the speed of weightlessness is best to take 1-2 times more lightly in the middle and late period so as to adjust the moisture supply in time.8.The hatching and midwifery.The hatching of the young birds should be checked in time. Gently peel the big hole, pull the head out and wait for the shell to exit. It is best to open a small power bulb in the hatchery ( 15w incandescent light bulb) Practice has proved that turning on the lamp in the hatching box is helpful for the hatching of the young bird 9. New umbilical and disinfection Most of the natural hatched chicks have good effects on breaking the umbilical cord, but some umbilical cords also have poor absorption. Hemorrhage, iodine should be applied to the umbilicus to ensure the survival of each chick.
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