In hot summer, the high temperature weather brings difficulties to the management of broilers.
In order to provide a comfortable environment for broilers, through the control of the air cooling coefficient, humidity and heat coefficient, broiler body temperature and heat stress index of broilers of different ages, the wet curtains technology can be controlled. The correct application of scientific use to large-scale chicken farms has become the general trend.
The daily use of the wet curtain should pay attention to the following issues:
1. According to the age of the chicken, the temperature of the external environment, the target temperature, the air cooling effect and other factors, the number of vertical fans to be turned on, the switching time of the water pump and the switching time interval are determined.
2. Follow the step-by-step principle at the beginning of the use of the wet pad, so that the chickens have a process of adaptation, gradually increase the opening time of the wet pad and gradually reduce the water pump off time, and gradually increase the area of the wet pad from 1/4. After the water curtain paper is completely dry, start the water pump to supply water, and keep the water curtain in a cycle of gradually drying and gradually getting wet, so as to achieve the best effect of evaporation of water vapor from the surface of the water curtain paper.
3. The actual temperature of the chicken house is more than 5°C higher than the target temperature.
4. There are fewer feathers in the brooding period and the body temperature is lower, so use the wet curtain with caution.
5. Adjust the watering time and interval in time when the weather changes suddenly. The temperature is low at night, and the wet curtain is stopped. You can flexibly switch between longitudinal ventilation and transitional ventilation. The number of fans used is changing. Small changes in surface wind speed and relative humidity can avoid large changes in body temperature and achieve the purpose of comfort and normal feeding of chickens.
6. After using the wet curtain, the change of negative pressure should not be too large, and it should be kept at 0.05~0.1 inches of water column (12.5~25Pa).
7. The area of the wet curtain needs to be sufficient. When the area is small, the wind speed through the curtain will be large, which will cause the humidity in the house to increase, the body temperature will become higher, and the heat stress index will increase, and the cooling effect will be poor. Stress, the chickens are hypoxic and feed intake is low.
8. Mostly use the wet curtain from 10:00 to 16:00, use the wet curtain wind deflector, scientifically adjust the opening size, keep the insulation board suitable for a stable wind speed of 2 m/s, and prevent the wet and cold air from blowing directly to the chickens close to the wet curtain . Pay attention to the change of the wind speed of the wet curtain, avoid the sharp increase of the humidity in the house, and pay attention to the change of the body temperature caused by the change of the body surface wind speed in the chicken house and the temperature and humidity in the house.
9. By carefully observing the flock, adopt a scientific and effective ventilation mode in time. Before using the wet curtain, start with minimum ventilation-transition ventilation-longitudinal ventilation. Start using the wet pad: longitudinal ventilation – transition ventilation humidification curtain water supply – longitudinal ventilation humidification curtain water supply (open several dampers at the wet pad end) – longitudinal ventilation humidification curtain water supply; such as transition ventilation humidification curtain evaporative cooling and longitudinal ventilation humidification curtain Evaporative cooling mode switching, when the wet curtain is stopped, the switching between longitudinal ventilation and transition ventilation, the number of air doors used, the size of the air inlet area, and the increase or decrease in the number of fans, through the air cooling coefficient, humidity coefficient, broiler body temperature and The control of heat stress index maintains a constant body temperature through various management measures.
10. The purpose of using the wet curtain is to control the temperature, not to cool down.
Post time: Jul-04-2022
