1. Cooling: Reduce the temperature of the house. Chickens do not have sweat glands. The heat generated in the body can only be lost by breathing, and its ability to adapt to high temperatures is poor. When the temperature exceeds 25°C, a curtain can be installed at the air inlet to allow the hot air to cool before entering the house. This method can reduce the temperature by 4-5°C and maintain the cooling time by 6-8 hours. When the temperature exceeds 30°C, the spray nozzle can be used to spray cold water directly to the roof or chicken body, every 2 - Spray once in 3 hours, the temperature in the house can be reduced by 6-8°C.
2, lower energy: that is, reduce the energy value of feed. Tests have shown that when the temperature is above 25°C, the feed intake of broiler chickens decreases by 1.6% for every 1°C increase in the house, and the energy level should be appropriately reduced to increase the protein level by 10%-15%. Plant protein can be used instead of animal protein feed. Reduce the greasy taste of chickens and increase the multidimensional factor in the diet by 2 times. At the same time, granular feeds can be exchanged to increase palatability, increase feed intake, and increase total nutrient intake of broilers. During the hot season, it is best to feed at night. From 10 pm to 6 am the next morning is the coolest time for broilers to feed. The method is: appropriate increase in the brightness of the house, increase the excitability of broilers, feeding 4-5 times at night, and to maintain a strong appetite by vibrating drums to drive chickens and other measures. In addition, dry and unpolluted river sand can be used as a litter in summer to facilitate heat dissipation in broiler sand baths and chicken bodies, and to enable broilers to eat sand grains, which is beneficial to food digestion.
3, reduce the density: that is, reduce the stocking density. Suitable density of broiler chickens in summer: 30 to 25 eggs per square meter at 7 to 14 days of age, 25 to 15 eggs at 21 to 28 days, and 10 to 5 eggs at 35 days of age. It is advisable to use 300 animals per group. Flocks and groups are separated by fences to facilitate the circulation of air inside and outside.
Second, do a good job of "three guarantees"
1, water: that is, to ensure adequate supply of water. Summer temperatures are high, broiler's respiration is quickened, and the body's water evaporation is large, and its drinking water is obviously increased. Therefore, set enough sinks to ensure that each bird can drink enough water. In addition, keep drinking water clean and hygienic.
2, Bao Qing: that is guaranteed to feed a certain amount of green succulent feed. Juicy green feed is rich in nutrition, good palatability, can promote the appetite of broilers, help digestion, both thirst-quenching and cooling, is conducive to rest in broilers.
3, security ventilation: that is, to ensure good ventilation. Due to the high temperatures in the summer and the increased respiratory rate, the concentration of carbon dioxide and harmful gases in the air increases. Therefore, to ensure that the broilers have sufficient oxygen, they must be ventilated. They should always open doors and windows for ventilation, and they can install exhaust fans.
Third, attach importance to the "three defenses"
1, disease prevention: the prevention of disease. High temperatures can reduce the resistance of broilers and cause coccidiosis, staphylococcal disease, etc. Therefore, in addition to supplementing the feed with antibiotics, the poultry house must be sterilized. Disinfectant should be selected as a broad-spectrum, high-efficiency, non-toxic side-effect disinfectant, such as 100 toxin-killing, virus-purified net, sodium hypochlorite, etc., sprayed at 15 ml per square meter, and the spray should be 50-80 cm away from the flock. In normal circumstances, 1-2 times a week, on a hot day, once a day, in the afternoon, while reducing the concentration of the drug by 30-50%.
2, moisture-proof: that is, pay attention to keep the coop and the stadium dry. The optimum relative humidity for broilers is 50-70%, and when the relative humidity is higher than 70%, the feathering, filth, and arthritic diseases will also increase. Especially in high temperature and high humidity environment, it is easy to breed microorganisms and induce the occurrence and spread of diseases. Therefore, the potholes in the playground should be filled to keep the drainage clear, and the weather is rainy and cloudy. In particular, the hen house should be kept dry to prevent mold growth.
3, prevent mosquitoes and flies: that is, to prevent mosquitoes and flies against the chicken body. In the summer, there are many mosquitoes and mosquitoes. In addition to paying attention to the health of the chicken house and sports ground, the weeds around the chicken house have to be cleansed, the sewage pits must be filled, the screens must be nailed, and the mosquitoes and flies must be sprayed regularly to ensure Broilers have a peaceful environment. (Han Qizeng)
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