Broiler breeding, cooling

1-2 weeks old 30 ~ 25/m2; 3 ~ 4 weeks old, 25 ~15/m2; 5 weeks old 15 ~ 10/m2. It is advisable for each group to have 300 animals, and the groups are separated by fences to facilitate indoor air circulation.

2 Strengthen ventilation and heat dissipation to reduce the indoor temperature.

2. The power of the exhaust fan can be increased, so that the wind speed flowing through the chicken can be increased, and the heat generated by the take the chicken body can be brought in time to accelerate the heat discharge in the house. Practice has proved that increasing human ventilation in the morning is the most obvious effect, which can not only make broilers eat for a long time and endure the higher temperature during the day, but also help to reduce the maximum temperature in the henhouse one day. Conditional can install wet curtain cooling device. The comparative data show that the average difference between wet curtain cooling and outdoor temperature is 5-8℃, and the average difference between wet curtain cooling and room without wet curtain is 3-4℃.

3. Let the broilers drink cold water.

The temperature of deep well water is generally around 65438 08℃, which is a good refreshing drink for broilers and can effectively reduce the stress caused by heat. Because the amount of water consumed by broilers increases at high temperature, the amount of feces excreted is also large, which can take away more heat in broilers. Therefore, where conditions permit, a self-flowing sink can be used to continuously supply water with a small pump to keep the drinking water low. If the traditional vacuum water dispenser is used, the number of water changes should be increased, and the water added by the water dispenser should be the deep well water that has just been pumped.

4. Heat insulation, sunshade and roof sprinkling

The roof is the largest part of the heating surface of the henhouse, and wheat straw or straw can be used as the roof. If the roof is made of other materials (such as asbestos tile and cement board), it can be covered with grass curtains or planted with vines for shading, which can reduce the temperature of the henhouse to some extent. Spraying cold water on the roof with automatic sprinkler can reduce the indoor temperature.

5. Strengthen feeding when the weather is cool.

When the weather is cool, broilers will increase their intake. Therefore, when the temperature drops and the weather is cool, we should pay attention to feeding in time, don't miss the feeding opportunity and increase the feed intake of broilers as much as possible. In summer, the appetite of chickens is weakened. When it is hot at noon, you can feed more green and juicy feed such as watermelon peel, root tuber and green vegetables, which can quench your thirst and cool down, which is conducive to the rest of chickens. In order to improve the feed intake of chickens, low calcium feed can be used to supplement bone particles and shell particles respectively, and chickens can eat freely; In addition, you can also choose safe and effective flavoring agents.

6, adjust the feed formula

When heat stress has a great influence on the feed intake of broilers, a high-energy and high-protein diet should be adopted. If fat is added to the diet to increase the energy concentration, the resistance of broilers to heat stress can be increased. Another example is that adding major amino acids (lysine and methionine) can reduce the body weight gain of heat-stressed broilers and improve the feed utilization rate.

7. Appropriate vitamin C supplementation.

Generally, chickens will synthesize vitamin C to meet their growth needs, so they are not short of vitamin C. However, under heat stress, their ability to synthesize vitamin C will be greatly reduced, which cannot meet their own needs. Because vitamin C has a cooling effect, it can reduce the adverse effects of heat stress on chicken metabolism. Therefore, vitamin C should be added to broiler diets in summer, and vitamin C powder ≥40% 50g can be added to 100 kg feed or ≥40% 25g can be added to 100 kg drinking water.

8. Do a good job in disease prevention.

It is necessary to do a good job in environmental sanitation, eliminate breeding grounds of mosquitoes and flies, reduce the vectors of infectious diseases, wash tanks regularly and disinfect regularly to ensure the health of chickens. Choose dry, clean, moisture-absorbing, non-toxic, non-irritating and non-moldy soft padding materials, such as sawdust and rice husk. ; Cushion must be kept dry and soft, regularly sift out feces, and often dry and change, so that there will be no odor. If the humidity in the house is too high, it will inhibit the discharge of water in the body, affect metabolism, easily cause disease caused by bacterial reproduction, and cannot guarantee the healthy growth of chickens. Strictly implement the health and epidemic prevention system and vaccinate according to immunization procedures; Try to keep the henhouse clean and disinfect it at least/kloc-0 times a week. Pay attention to the use of drugs that are less harmful to chickens and eliminate pests such as mosquitoes and flies in time. Strengthen the observation of chickens, pay attention to the mental state, behavior, food intake and fecal morphology of chickens, and take corresponding measures in time when abnormalities are found.