First, the choice of eggs, preservation and disinfection of eggs should come from feeding and management of normal, healthy and high-yielding geese, male and female with a reasonable, best egg production within 7 days, if more than 7 days will be cryopreservation, with no more than 11 °C It is advisable that if the temperature is below 0°C, the eggs will lose their ability to hatch due to freezing. During the preservation period, the egg is turned once a day to prevent the blastoderm and eggshell from being contaminated and the embryos die early. After the eggs are produced and before hatching, they should be disinfected. Place 15 g of potassium permanganate in each cubic meter of space into 30 ml of formalin in the porcelain plate, fumigate for 20-30 minutes, and the temperature should be 20-24°C, relative humidity. 75% - 80%, fully ventilated after a half hour of closure. Or soak the eggs in bleach solution containing 1.5% active chlorine for 3 minutes to dry. Can also be placed on the eggs under the ultraviolet light 40-80 cm at the lights for 20 minutes can also kill egg surface bacteria. 2. Incubation Put the sterilized eggs on the bed and adjust the temperature of the mash according to room temperature and embryonic age. In actual practice, the hatching temperature is adjusted by the number of times and time of burning, the amount of the cover, the hatching method is generally adopted in batches, the new egg is near the end of the heat source, and the hatching position is gradually changed with the increase of the number of days. Move older eggs to the bottom of the heat source. Third, temperature and temperature are the most critical conditions for the success or failure of the incubation process. On the first day from 38.1°C to the 6th day, it gradually decreased to 37.8°C. When the egg was fertilized, the unfertilized eggs were picked out. After the fertilized eggs were rotated, the yolk was immobilized and the embryo and yolk blood vessels were shaped like a small spider. From 7 to 12 days, the temperature dropped from 37.8°C to 37.5°C. At this time, the egg yolks on both sides were easily shaken when the egg was rotated, and the blood vessels on the back of the allantoic blood were stretched. From 13 to 18 days, the temperature dropped from 37.5°C to 37.2°C. At this time, the blood vessels continued to thicken and the color deepened. The left and right yolks were connected at the big end. From 19 to 28 days, the temperature dropped from 37.2°C to 36.9°C, and the shadows flashed as you saw the eggs. From 29 to 31 days, the temperature dropped to 36.9°C to 36.7°C. The shells were partially hatched in 30 days, and they basically went out in 31 days. Fourth, the humidity of hatching 1-9 days relative humidity of 60% -65% is appropriate, 10-26 days, 50% -55%, 27 days after the 65% -70%. V. Ventilation In the incubation process, ventilation must be maintained to maintain fresh air. In particular, the amount of ventilation during the later period of incubation should be gradually increased. Otherwise, due to poor ventilation, death before hatching increases. 6. Turning Eggs and Continuing Eggs During the hatching process, eggs must be constantly turned and dried. Under certain temperature conditions, the moisture in the eggs is continuously evaporated. If you do not turn the egg for a long time, the embryo will stick to the eggshell, causing the embryo to die. Turning eggs can also promote the movement of the amniotic membrane, improve the blood circulation of the amniotic membrane, and make the embryo constantly change the position of the fetus so that it can be heated evenly, which is beneficial to the development of the embryo and helps the embryo to exercise and maintain the normal fetal position. Turning eggs from the hatching time to 28 days before the end of egg turning once every 2-4 hours, early diligent turning, late turning less, turn the egg angle controlled at 45-90. Eggs or not depending on the temperature of the egg, where the hatching embryo eggs with eyelid temperature, feel hot, they should be hanging eggs, eggs, eyelid temperature with warm and not cool is appropriate. During the summer, the temperature of the eggs is not easy to drop when they are chilled, and cold water can be sprayed on the surface of eggs to achieve the purpose of quickly conserving eggs. This technology is simple and easy to master, especially suitable for family incubation. Farmers may wish to try. (Xinyu Pavilion, Wanghuangdi, Xiaonan Town, Diaobingshan City, Liaoning Province)
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