Chickens have no sweat glands and are covered with feathers. The heat resistance is poor. Hot weather in summer can easily cause strong heat stress in chickens. Broilers show reduced feed intake, slow weight gain, and high mortality. Therefore, the most important thing in summer management is cooling off.
This problem should be taken into consideration during the design and construction of the chicken house, so that the chicken house can be oriented in a rational and open space, so as to help reduce the radiation of the summer sun. Around the hen house, luxuriant woods or vines are planted to shade the chicken house and heat radiation can also be reduced. Houses with poor thermal insulation on the roof can be reduced in temperature by reducing the amount of heat absorbed by the roof of the house or by reducing the temperature of the roof water spray. In order to maintain good ventilation, open doors and windows, and add wire mesh on doors and windows to prevent animal damage.
It is necessary to adjust the structure of the diet and feeding methods and supply enough water to the chickens. During the fattening period, if the temperature exceeds 27°C, the feed intake of the chicken decreases. On the basis of the original dietary nutrition level, the protein content can be increased by 1% to 2%, the multidimensional element can be increased by 30% to 50%, and the ration can be kept fresh. Granules are preferably used on the material to increase palatability. The feeding time should be arranged as early as possible in the cool morning and evening, 4 to 6 times a day, and provide sufficient cold water. In order to reduce heat stress, anti-stress drugs can be appropriately added to the feed. When the shepherd temperature is higher than 27°C, add an appropriate amount of vitamin C, 0.3% baking soda, 0.5% ammonium chloride, or 0.1% potassium chloride in drinking water.
In addition, to maintain proper stocking density, the density should be reduced by 5% to 10% over the other seasons in the same area, and the total weight of broiler chickens per square metre can not exceed 20 kilograms. At the same time, we must do a good job in environmental sanitation and disinfection.
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