Hatching techniques of wild geese breeding eggs

The sexual maturity of wild geese is relatively late, generally, it takes 3 years for females to lay eggs, and the sexual maturity of domesticated geese can be advanced to 9 ~ 10 months old, and one male can be matched with multiple females. Wild geese can be artificially hatched after domestication and breeding for three generations. When breeding geese enter the breeding period, sufficient water should be provided for them to mate, and breeding eggs should be collected in time for artificial hatching. The following points should be paid attention to in the hatching process of breeding eggs:

1. Breeding eggs should be fully sterilized before entering the egg storage to produce eggs, which are often contaminated by bedding grass and feces. Only a small amount of bacteria are present when they are just produced, and bacteria can enter the human eggs through the shell hole 30 minutes later. Therefore, the earlier the disinfection of breeding eggs, the better. The specific method is to first put the breeding eggs in the disinfection cabinet, according to 28 milliliters of formalin solution per cubic meter, 14 grams of potassium permanganate to prepare medicine, disinfection will first pour formalin into glass or pond porcelain container (due to the reaction will produce a large number of bubbles, the volume of the container should be 5-7 times larger than the volume of formalin), then pour potassium permanganate, close the doors and windows, a few minutes later, formaldehyde steam overflow After 12 hours and 24 hours, open the doors and windows, release residual gas, and move the eggs into the egg bank. Can also use solid formaldehyde disinfection, the dose used is 35 grams per cubic meter of space, disinfection of solid formaldehyde on the heat source, no temperature control can produce formaldehyde gas, other requirements are the same as above.

2. The temperature of the general breeding egg storage room is between 12 and 15 degrees Celsius before hatching. Preheating the breeding eggs before hatching can make the embryo have a process of adapting to the external environment and prevent the breeding eggs from sweating. The method is to move the breeding eggs from the egg bank into the hatching room before hatching, disinfect them by soaking, preheat them in the hatching room for 6-8 hours, and then hatch them. The commonly used drugs for soaking and disinfecting wild goose eggs are potassium permanganate, permethrin, bactericidal and Aidifu, etc. During disinfection, mix the medicine with warm water into the required concentration according to the instructions. Soak the eggs in the solution for 3-5 minutes, then remove them to dry and wait for them to hatch.

3. To maintain proper incubation conditions, the incubation time of geese is generally 28-31 days. The hatching conditions will directly affect the incubation period of breeding eggs. Among them, temperature is an important factor to determine the length of incubation period. For the whole batch of hatched eggs, most of them are hatched at variable temperature, which ranges from 39 to 37 degrees Celsius, while those hatched in batches are hatched at a constant temperature of 38 to 38.5 degrees Celsius. Another important factor affecting the hatching rate is humidity, which can evenly heat all parts of the eggs and increase the brittleness of the eggshell, which is beneficial to the breaking of the eggshell of young geese. Generally speaking, the humidity control principle in the hatching process of breeding eggs is high at both ends and low in the middle. The specific temperature and humidity can be referred to the following table. In addition, ventilation is also very important in the process of hatching, especially in the middle and later stages of hatching, with the enhancement of the metabolic capacity of embryos, oxygen consumption also increases. Under the premise of ensuring normal incubation temperature and humidity, ventilation is better.