Summer hot weather often causes broiler heat stress. In the case of heat stress, broiler production performance is reduced. In order to reduce and eliminate the impact of heat stress on broiler growth, we must take comprehensive measures to prevent heatstroke.
1. Strengthen the chicken house cooling performance. Overhaul the house to reduce the light penetration and heat penetration of the house and increase the coefficient of thermal insulation of the roof. Scatter the grass on the roof and place the branches.
2. Reasonably install ventilation facilities. Install exhaust fans to dissipate heat through the gas flow and reduce the chicken's heat stress. The exhaust fan is best installed on the ceiling of the chicken house and vertical exhaust is implemented.
3. Appropriately reduce the stocking density. Generally, 7-8 broilers are bred per square metre, and 6 broilers per square metre are housed in long-breeding or poorly ventilated houses. In summer, the chickens should be expanded 1-5 days earlier, and should be carried out at least before 25 days of age.
4. Adjust the nutritional level of the diet. During heat stress, the body's metabolism is increased and fed with high-energy feed; it can slow down the growth rate of broilers. In addition, moderate amounts of protein, minerals, and vitamins can also reduce the effect of heat stress on feed intake.
5. In hot weather, feed anti-stress drugs, such as adding 0.03% to 0.05% of vitamin C in drinking water or 0.02% to 0.04% of feed.
6. Strengthen litter management. Properly reduce the thickness of the litter and try to keep the chicken close to the ground. Sand should be used as a litter if conditions permit. Replace wet litter in time. Reduce the humidity in the house so that the moisture evaporates and absorbs heat to cool down. On-line flat-raising should promptly clean up chicken manure under the net to prevent high temperature and high humidity and high ammonia concentration.
7. Promote the drinking of chickens and increase the number of drinking fountains, which will help the birds to fully drink water. Wash the water dispenser frequently to stimulate chicken drinking. Rinse the hose regularly to allow cooler water to flow into the waterer.
8. Improve the feeding method. When the weather is sultry, the bucket is hung up for a short period of hunger strike; at the same time, the wind speed at the height of the bird body can be increased. In general, chickens should start fasting 3-6 hours before the onset of heat stress. The heat stress is 4-6 hours, so the total hunger strike time is 7-12 hours. Tests have shown that short-term hunger strikes can improve the survival rate of broilers, but have little effect on the growth rate. Feeding is generally conducted in the early morning and early evening. In the evening, the number of feeds was appropriately increased, and the drums were often shaken to increase the feed intake of the chickens.
9. Set a simple curtain. For vertical ventilation, install a water pipe sprayer at the air inlet of the house. The water vapor evaporates and absorbs heat, which lowers the temperature of the air inlet. Because of the negative pressure of the fan, the cool air is sucked into the chicken house, thereby achieving the purpose of cooling the house. The spray equipment is installed on the inner side of the chicken house, about 9 meters long, and the water pipe leads the operation room to the middle of the air inlet of the chicken house, and then connects two finer water pipes left and right. Each pipe is installed at a distance of 30 centimeters. Nozzle, nozzle outward. The spray curtain on both sides of the house is installed in the same way.
In order to facilitate the use of the water curtain, a total section door is installed in the operating room of the chicken house, and a sectional door is installed on the root pipe farther than the operation room, and when a small amount of spray is required, the sectional door is closed. It is advisable to do some welding of the wire to the water pipe and to twist the nozzle so that it can be replaced at any time when the nozzle is clogged and damaged. In addition, the use of spray curtains also consider the drainage problem.
10. Install "Little White Dragon" inside the house. On the ground or grid of the house, a plastic hose with a diameter of 10-20 cm is placed on the curved plate. One end is connected to the water pipe or the pressure pump, and the water is poured into the water at the other end, and the water is released from the other end. Chickens have high habitats and they like to stand on the hoses. In this way, the constant flow of cold water in the water pipes takes away the heat from the chicken's chest and helps cool the body. Normally, it is necessary to reasonably adjust the flow rate according to changes in outside air temperature.
11. Reduce superimposed stress. After the onset of heat stress, try to enter the chicken house as little as possible. Others such as expanding production, immunization, weighing and other production work should be arranged in cool time.
12. Set up a habitat. The chickens have high habitats. After setting up a habitat, some chickens will stand up, which will relatively reduce the breeding density of chicken houses and increase the amount of chicken body heat.
13. Clean the air inlet debris to promote smooth air flow. Remove the different utensils and equipment in the house to promote air circulation. Naturally ventilated coops regularly clean the side windows of the house and the weeds around the ground windows.
14. Sprinkle water intermittently around the air inlet and the chicken house. It is conditional to sprinkle water intermittently on the house when it is extremely hot.
15. Always pay attention to weather changes and guard against the first heat stress. After heat stress stimulation, the heat-resistance of the chicken was significantly improved. Heat stress will reduce the damage to chickens later.
16. Hang a red cloth in the shed. Chickens often have a habit of licking. According to the hobby of chicken love blush, hanging a red cloth in the house to make the chicken quail can prevent maggots.
1. Strengthen the chicken house cooling performance. Overhaul the house to reduce the light penetration and heat penetration of the house and increase the coefficient of thermal insulation of the roof. Scatter the grass on the roof and place the branches.
2. Reasonably install ventilation facilities. Install exhaust fans to dissipate heat through the gas flow and reduce the chicken's heat stress. The exhaust fan is best installed on the ceiling of the chicken house and vertical exhaust is implemented.
3. Appropriately reduce the stocking density. Generally, 7-8 broilers are bred per square metre, and 6 broilers per square metre are housed in long-breeding or poorly ventilated houses. In summer, the chickens should be expanded 1-5 days earlier, and should be carried out at least before 25 days of age.
4. Adjust the nutritional level of the diet. During heat stress, the body's metabolism is increased and fed with high-energy feed; it can slow down the growth rate of broilers. In addition, moderate amounts of protein, minerals, and vitamins can also reduce the effect of heat stress on feed intake.
5. In hot weather, feed anti-stress drugs, such as adding 0.03% to 0.05% of vitamin C in drinking water or 0.02% to 0.04% of feed.
6. Strengthen litter management. Properly reduce the thickness of the litter and try to keep the chicken close to the ground. Sand should be used as a litter if conditions permit. Replace wet litter in time. Reduce the humidity in the house so that the moisture evaporates and absorbs heat to cool down. On-line flat-raising should promptly clean up chicken manure under the net to prevent high temperature and high humidity and high ammonia concentration.
7. Promote the drinking of chickens and increase the number of drinking fountains, which will help the birds to fully drink water. Wash the water dispenser frequently to stimulate chicken drinking. Rinse the hose regularly to allow cooler water to flow into the waterer.
8. Improve the feeding method. When the weather is sultry, the bucket is hung up for a short period of hunger strike; at the same time, the wind speed at the height of the bird body can be increased. In general, chickens should start fasting 3-6 hours before the onset of heat stress. The heat stress is 4-6 hours, so the total hunger strike time is 7-12 hours. Tests have shown that short-term hunger strikes can improve the survival rate of broilers, but have little effect on the growth rate. Feeding is generally conducted in the early morning and early evening. In the evening, the number of feeds was appropriately increased, and the drums were often shaken to increase the feed intake of the chickens.
9. Set a simple curtain. For vertical ventilation, install a water pipe sprayer at the air inlet of the house. The water vapor evaporates and absorbs heat, which lowers the temperature of the air inlet. Because of the negative pressure of the fan, the cool air is sucked into the chicken house, thereby achieving the purpose of cooling the house. The spray equipment is installed on the inner side of the chicken house, about 9 meters long, and the water pipe leads the operation room to the middle of the air inlet of the chicken house, and then connects two finer water pipes left and right. Each pipe is installed at a distance of 30 centimeters. Nozzle, nozzle outward. The spray curtain on both sides of the house is installed in the same way.
In order to facilitate the use of the water curtain, a total section door is installed in the operating room of the chicken house, and a sectional door is installed on the root pipe farther than the operation room, and when a small amount of spray is required, the sectional door is closed. It is advisable to do some welding of the wire to the water pipe and to twist the nozzle so that it can be replaced at any time when the nozzle is clogged and damaged. In addition, the use of spray curtains also consider the drainage problem.
10. Install "Little White Dragon" inside the house. On the ground or grid of the house, a plastic hose with a diameter of 10-20 cm is placed on the curved plate. One end is connected to the water pipe or the pressure pump, and the water is poured into the water at the other end, and the water is released from the other end. Chickens have high habitats and they like to stand on the hoses. In this way, the constant flow of cold water in the water pipes takes away the heat from the chicken's chest and helps cool the body. Normally, it is necessary to reasonably adjust the flow rate according to changes in outside air temperature.
11. Reduce superimposed stress. After the onset of heat stress, try to enter the chicken house as little as possible. Others such as expanding production, immunization, weighing and other production work should be arranged in cool time.
12. Set up a habitat. The chickens have high habitats. After setting up a habitat, some chickens will stand up, which will relatively reduce the breeding density of chicken houses and increase the amount of chicken body heat.
13. Clean the air inlet debris to promote smooth air flow. Remove the different utensils and equipment in the house to promote air circulation. Naturally ventilated coops regularly clean the side windows of the house and the weeds around the ground windows.
14. Sprinkle water intermittently around the air inlet and the chicken house. It is conditional to sprinkle water intermittently on the house when it is extremely hot.
15. Always pay attention to weather changes and guard against the first heat stress. After heat stress stimulation, the heat-resistance of the chicken was significantly improved. Heat stress will reduce the damage to chickens later.
16. Hang a red cloth in the shed. Chickens often have a habit of licking. According to the hobby of chicken love blush, hanging a red cloth in the house to make the chicken quail can prevent maggots.
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