Comprehensive measures to improve laying performance of laying hens in summer
2024-10-20 04:59:53
In hot summers, laying hens are often in a state of heat stress, so egg production performance declines and even causes the death of laying hens. Therefore, the prevention of heat stress in chickens in summer is the key to raising chickens and improving egg production performance. Now from the following aspects to explore the summer to improve laying hens egg production technical measures. 1 Environmental Control 1.1 Greening green plants in chicken farms has a good shading effect. It absorbs the heat of solar radiation through the evaporation of leaves surface and photosynthesis, together with the shielding of trunks and grass quilts, the temperature of chicken houses can be reduced by 2~ 3°C. When planting trees in a house, the impact of roots on the building foundation should be considered. 1.2 Brushing the wall of the heat-reducing chicken house is painted white with quicklime water or white paint. White reflective paint or white cement is sprayed on the roof to enhance the reflection of light and reduce the absorption of solar radiant heat in the house. 1.3 Ventilation and cooling are mainly based on the flow of air to disperse the body heat generated by the poultry in the house to prevent the accumulation of heat in the house and increase the temperature of the house. Modern chicken farms have a high degree of intensification. Doing a good job of ventilation and cooling in homes is an important part of preventing heat stress in chickens. The vertical ventilation and wet curtain cooling system is ideal for the ventilation and cooling process in the summer house, which can significantly reduce Sherwin's temperature from 2 to 8°C. The following aspects of management should be strengthened during use: (1) Axial fans are belt driven, so the tightness of the belt affects the speed. (2) The increase of dust in the shutters increases the resistance, causes the motor power to rise, and even overloads the motor. Therefore, it is necessary to remove the shutter dust in time. (3) Wet curtains should be washed frequently to prevent clogging and contamination of debris and affect the cooling effect, air intake, and air quality. 2 When diets are adjusted to high temperatures in summer, the feed intake of chickens will be reduced to varying degrees. In order to meet the nutritional needs of the chicken body, the diet should be adjusted accordingly. 2.1 Increase Nutritional Concentration of Dietary Diet Add 1% to 2% fat to the diet of laying hens to increase dietary energy and protein levels. In addition, adding the right amount of amino acids can increase the body's use of proteins. 2.2 Addition of Minerals When temperatures are high in summer, chickens dissipate heat through frequent breathing and increased excretion. This can lead to a decrease in the concentration of hydrogen ions in the blood, an increase in pH, and a breakdown of electrolyte balance. Therefore, appropriate amounts of minerals, especially calcium, phosphorus, sodium, potassium, and chlorine should be added to the diet or drinking water. 3 Adequate, fresh, cool drinking water Heat stress in chickens accounts for more than 80% of the heat produced by the evaporative effect of the chickens, because the water acts as a heat carrier and can also increase the amount of heat released per breath. When the weather is hot, the chicken's urine output increases, and the chicken's drinking capacity is greater than the amount needed to evaporate heat to lose water, so that the chicken maintains a positive balance of water metabolism, effectively maintaining body temperature. In addition, it is added in cool drinking water. Sodium chloride can better achieve the purpose of cooling. 4 Application of anti-stress additives to alleviate heat stress 4.1 Vitamin C supplementation Vitamin C can significantly inhibit the rise of body temperature, increase feed intake and increase resistance in hot weather. Generally added in the feed: broilers 100 ~ 150g / t, broiler breeders 150 ~ 200g / t feed. When added by drinking water, generally add 1g of vitamin C per liter of drinking water, and continue drinking water. 4.2 Add vitamin E Vitamin E can resist the lipid peroxidation caused by free radicals, maintain cell membrane function, so that more cells maintain normal function in heat stress, generally 200 ~ 300mg/kg in the diet. 4.3 Adding anti-heat stress additives Add 0.3% sodium bicarbonate to layer chicken feed not only improves the hardness of the shell, but also increases the egg production rate by 11%. In addition, when the temperature is high, adding 0.4% to 1.0% of potassium chloride in the diet can also receive good results. 5 to strengthen the feeding and management 5.1 to reduce the stocking density summer density is too large, is not conducive to heat dissipation of chickens, easy to cause heat failure, it should be based on the number of chickens to reduce the breeding density, the general cage should be reduced by about 20%. 5.2 Timely cleaning of feces The chickens in summer have a large amount of water and dilute feces. They are easily fermented to produce harmful gases such as ammonia and hydrogen sulfide and deteriorate the home environment. Therefore, it is necessary to clean the excrement in time, preferably once a day. 5.2 Chicken Disinfection Chicken spray disinfection in summer can not only kill the pathogen, but also reduce the temperature inside the house, and play a role in cooling the sun. Generally, once a day, use a broad-spectrum, high-efficiency, non-toxic, non-irritating odor disinfectant to prevent respiratory diseases. 5.4 Reducing various stress factors During the summer high temperature season, laying hens have low self-resistance. At this time, artificial stress factors such as crowding, transportation and vaccination should be avoided as far as possible, and the environment of the sheds should be kept quiet. When it must be done, cool weather should be selected and it should be done sooner or later. 5.5 Elimination of mosquitoes, flies and other pests in the summer will facilitate the spread of disease, and insecticides harmless to humans should be regularly sprayed on the walls and floors of poultry houses to completely eliminate insects such as mosquitoes and flies. In short, according to the actual situation, taking comprehensive measures can effectively improve the egg laying performance.
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