In autumn, there are climatic features such as gradual temperature drop, dry weather, and large temperature difference between day and night. Environmental control is not good, and it tends to cause a decrease in the degree of uniformity and a drop in the hatching rate. For these characteristics combined with years of hatching experience, the summary of the autumn hatching is summarized in four sentences: The preservation of eggs is the basis, and the stability of the external environment is the most critical; the stability of the internal environment is a guarantee, and sanitation and epidemic prevention are the backing.
First, preservation of eggs is the basis
High quality eggs are the basis for the production of 4A chicks. The key point for the preservation of autumn eggs is to "shorten the temperature difference between day and night." In the early autumn, the daytime temperature is relatively high, generally around 30°C, and the air conditioner needs to be turned on; at night, the temperature drops below 20°C, and the air conditioner does not need to be turned on. Make sure the storage temperature of eggs is around 18°C.
Second, the stability of the external environment is the key
The external environment refers to the environment outside the hatchery and beyond the incubator. There is a large temperature difference between day and night in the fall, and it is necessary for the hatching watchman to do a good job in environmental control and reduce the temperature difference between day and night to provide a stable development environment for the embryo. Through a great deal of practice, the key to environmental control is "stability." We divide the "stability" here into horizontal stability and vertical stability. Remark: The ventilation method is negative pressure ventilation.
1, lateral stability
Refers to the stability of each point in the hatchery. The criteria for measuring the stability are based on the difference between the inlet air temperature of each incubator and the size of the window and the fan to achieve a stable final target (minimum minimum temperature and maximum temperature difference); Age inlet air temperature standard.
2, vertical stability
Refers to the stability of the inlet air temperature at each time of each incubator. The criterion for measuring stability is that the temperature of the air inlet at each incubator does not fluctuate by more than 1°C. According to the change law of the outside air temperature, through adjusting the window and the fan at different times, the temperature stability in different time periods can be guaranteed. In addition, attention should be paid to the coordination between the window and the fan when ventilating. According to the characteristics of the daytime temperature in autumn that “rises quickly and drops rapidlyâ€, the rules of opening windows and fans at different time periods are summarized.
Third, the stability of the internal environment is guaranteed
The internal environment refers to the environment inside the incubator.
1, insulation
The problem that occurs in the autumn hatching is that the uniformity is decreased, and the incubator does not keep a gap in the insulation, which tends to cause the internal temperature of the machine to be uneven, resulting in a drop in the uniformity of the chicken. Therefore, doing a good job of insulation is the key to improving the uniformity of chickens. Insulation work shall be carried out in accordance with the four-place method. Each incubator shall be responsible to the people, and the insulation condition shall be regularly checked. The director shall check the incentives on a regular basis.
2, water temperature
Part of the heat in the incubator comes from the water temperature tube or the electric temperature pipe, and the other part comes from the temperature of the embryonic egg. Most hatchery now uses water temperature incubation, so the control of water temperature is especially important for ensuring the temperature. Although the water temperature can reduce the cost, the temperature and stability of the water temperature directly affect the state of the incubator. Therefore, determining the temperature and stability of the water temperature according to the changes in the weather has become the focus of attention in the autumn incubation.
Incubation parameters
As the temperature drops in the autumn and the air dries, the hatching parameters must also be adjusted. Humidity settings are typically adjusted up 2-3% and temperature settings are on the line. "Temperature" is measured by measuring the rate of beating and hatching at different times; "humidity" is monitored by measuring the rate of weight loss of the egg. According to the monitoring results, feedback on hatching parameters was evaluated and corrected in time.
Fourth, backing up the health and epidemic prevention
Good health and epidemic prevention is the strong backing for doing a good job of hatching, and it is an unfailing work.
1. Daily epidemic prevention standardization
Including fumigation of eggs, fumigation of post-incubator incubators, disinfection of hatchery, etc. must be performed in strict accordance with standards (time, dose, frequency).
2. Normalization of environmental governance
The environmental treatment of the internal environment and external environment is listed as daily work, instead of centralized cleanup before major inspections, and it is necessary to clean up and maintain every day.
3, institutionalized supervision and inspection
A special epidemic prevention team was set up to conduct comprehensive inspections on the health of the site and the health of the epidemic in the hatchery every week.
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