First, how to distinguish the quality of muscovy duck seedlings
1. The eyes of high-quality muscovy ducks can be opened normally, while the eyes of poor muscovy ducks are foggy or seem to be covered (eyes are dull).
2. The navel of high-quality muscovy duck seedlings is relatively clean, and the navel of inferior muscovy duck seedlings will have feces or eggshells.
3. The mouth and limbs of high-quality muscovy duck seedlings are ruddy and shiny, while those of poor muscovy duck seedlings are dry.
4. The duck feet of high-quality muscovy ducks are moist and strong when standing, but the quality of duck feet is poor.
Second, why are there many stillbirths in the late incubation period of muscovy ducks?
The late incubation period of duck eggs is about 16-23 days, and there will be a death peak at this stage. Generally, the number of dead embryos accounts for about 50% of the total number of dead embryos on the 22nd-23rd day.
Why are there so many stillbirths in the late incubation period of muscovy ducks? The main reason is that the embryo changes from allantoic chorionic respiration to lung respiration, the physiological changes of the embryo are drastic, the metabolic intensity is high, the stress of external environment changes is great, the demand for oxygen is also relatively large, the heat generated by itself increases sharply, and the embryo dies of infection.
Third, how to improve the success rate of muscovy duck hatching
Duck eggs have high requirements for hatching environment. When the temperature is too high, the relative humidity is too low, the number and angle of turning eggs are not enough, the ventilation is not good, and the cold eggs are not in place, the developing embryos will die. Therefore, controlling and adjusting hatching conditions can improve hatching rate and reduce mortality.
After entering the normal incubation process, with the incubation process, the activation of the air door will gradually open, the ventilation volume will increase accordingly, and the temperature in the box will also change. At this time, we must pay attention to observation and maintain the appropriate temperature.
4. The temperature and humidity requirements for muscovy duck hatching are 1, and the temperature requirements for muscovy duck hatching.
Before muscovy ducks hatch, the pre-temperature of eggs must be 36-38℃, preheated for 6-8 hours, and the high temperature must be maintained in the early stage, kept gentle in the middle stage and slightly lower in the later stage.
The incubation temperature must be slightly higher, which is 1-7 days 39-39.6℃, 8- 19 days 38.5-39.0℃, 20-30 days 38-38.6℃ and 3 1 day to 38.6-39.2℃ respectively.
2. Humidity requirements for muscovy duck hatching.
The humidity control principle of hatching muscovy ducks is that the two ends are high and the middle is flat. High humidity in the early stage can make eggs heated evenly, and flattening in the middle stage is beneficial to embryo metabolism.
In the later stage and incubation stage, it is necessary to increase the humidity, so that excessive physiological heat can be dissipated and the eggshell structure can be loosened, so that the eggshell can be pecked out and hatched.
Note: When the humidity of brood exceeds 75% and the ventilation is not good, the embryo will suffer from acidosis due to poor gas exchange, and the embryo will suffocate and die.