In hot summer weather, laying hens are prone to decline in feed intake and decreased resistance. If the conditions of the henhouse are poor, the chicken body will have difficulty in dissipating heat. A slight oversight will make it more susceptible to disease. Therefore, in order to increase the economic benefit of laying hens in summer and eliminate the adverse effects caused by stress to the maximum extent, it is necessary to adopt comprehensive measures such as lowering temperature, investigating dietary structure, changing feeding methods, supplying refreshing fresh drinking water, and strengthening feeding management. Measures to ensure stable production of laying hens at high temperatures and maximum economic benefits.
First, do a good job of cooling
Chicken feathers cover the whole body, there is no sweat glands, and the heat is difficult to distribute in the body. Therefore, the high temperature environment affects the normal production of chickens, and effective measures must be taken to reduce the temperature. When the temperature exceeds the proper temperature for chicken production, all doors and windows should be opened, but barbed wire should be added to the doors and windows to prevent animal damage and birds. The brick house can spray cold water onto the roof. The method is: Install a rotating nozzle on the roof to ensure that enough water pressure is sprayed on the roof surface. It is best to lay a layer of straw on the roof to make the roof stay in the roof for a long time. In the wet state, at the same time, the fan is turned on, and the effect is better. It can reduce Sherwin's temperature by 4°C-6°C. The roof of the non-insulated system is best coated with white on the roof and the south wall, which can enhance the reflection and reduce the heat absorption. : After dissolving 0.5 kg of salt with 46 kg of water, add 40 kg of lime, 4.2 kg of white cement, add 68 kg of water, mix well, paint or spray the roof and exterior wall. This method can reduce the temperature of the house by 1.5°C-2. °C.
The proper temperature and humidity of the chicken house are necessary indicators for the chicken to lay eggs. The relative humidity reaches about 55% and the temperature reaches about 25°C, which is the best environment for laying eggs. When the temperature reaches 28°C or more, it is necessary to pay attention to the chicken's response. Especially at noon sun, the temperature of the chicken house often reaches about 32°C. With the accumulation of heat and the evaporation of water, the humidity will constantly decrease, and it is easy to happen. The rapid dry heat should be properly opened to increase the ventilation window, in addition to hanging cloth curtains to add water to cool, tap through the water to cool, add shade to the window to cool down, or install an electric fan at the same time.
Second, adjust feed nutrition
During the hot season, the feed intake of chickens decreases, and insufficient protein intake will directly affect the amount of eggs produced. Experiments have shown that methionine and lysine balanced low-protein diets are more valuable than diets containing total protein. This can be done by adding protein, adjusting formulas, increasing methionine, lysine 0.1%, or increasing pods by 2%. -3%, or 2%-4% more fishmeal, to achieve less good quality. According to the reduction of feed intake of chickens, the proportion of calcium and phosphorus in feed should be properly adjusted, generally increasing 5%-10%; adding 1%-3% vegetable oil at the same time to increase energy level; Vitamin E, vitamin C, and vitamins in diets The content of K and biotin and riboflavin should also be increased accordingly. It is advisable to regularly measure the feed intake of chickens and adjust the nutritional level of the diet to ensure that the production needs of the chickens are met.
Third, change the feeding method
At temperatures above 27°C, the feed intake of laying hens will decrease by 1.5% for every 1°C increase in temperature. Therefore, in hot climate conditions, we must first ensure the quality of feed and adequate access to slots, and appropriately reduce the energy level. Try to make the laying hens in a cool time to eat, adjust the light at night, increase the excitability of chickens, increase the number of feeding in the morning and evening and the amount of feed added. Special care should be taken to prevent the feed from becoming moldy and spoilage, which could easily cause intestinal disease or poisoning in laying hens.
Fourth, ensure the supply of cool fresh water
Water plays an important role in the body as a thermoregulator, because the increase in water temperature requires a lot of heat, so even if the ambient temperature rises rapidly, the increase in body temperature is very slow. At the same time, the amount of drinking water increases, and the excretion of water along with the excreta increases, but also take away a lot of body heat. During the hot summer season, sufficient cold water (preferably deep well water) must be provided to allow layer chickens to drink. The number of drinking fountains should be sufficient and there should be no faults. Each chicken should be able to drink water at any time. The water temperature should be around 10°C.
Fifth, add anti-stress drugs
When laying hens are subjected to heat stress, anti-stress drugs need to be added to the diet or drinking water, and 0.1-0.3 g of bacitracin zinc can be added per kg of diet; when the diet temperature is higher than 27° C., it can be fed at a kilogram per kg. Add 100-300mg of vitamin C to the grain, or add 100mg of vitamin C per kilogram of water, drink it throughout the day; add 0.3% of baking soda to the diet, and reduce the salt content of the diet; heat stress Prone to hypokalemia, so add 0.2% -0.3% potassium chloride in the diet or add 0.1% -0.2% potassium chloride in drinking water all day for drinking.
Sixth, strengthen daily management
Reduce the density, white cage chicken 4 per cage, brown cage chicken per cage 3, to enhance ventilation, summer microbial proliferation, rapid water evaporation, fast metabolism of chicken body, feces produce ammonia and carbon dioxide is also fast, so Attention should be paid to the supply and circulation of oxygen in the air. A long period of oxygen deficiency in laying hens will affect the production of eggs. Removal of chicken manure will result in relatively loose stools and high humidity in summer. Chicken manure can easily ferment and produce harmful gases such as ammonia and hydrogen sulfide. And other odors, can easily induce respiratory diseases. Therefore, manure and litter should be cleaned in time (at least every other day) to prevent pollution, keep the house clean, dry and sanitary.
Seventh, strengthen disease prevention and treatment
Do a good job of daily disease prevention and vaccination, and strengthen the prevention and control of coccidiosis and aspergillosis. During the hot summer season, laying hens should adopt scientific feeding methods. A common and easy method is to smash the garlic, mix it in the feed at a ratio of 0.5%, feed it 1-2 times a week, or feed the chicken. 1% potassium permanganate water can achieve ideal results 1-2 times a week. Due to the high temperature, the resistance of laying hens is reduced, which can easily induce related bacterial diseases. Therefore, chickens should be sterilized frequently to completely and completely kill the pathogenic microorganisms, and at the same time, they can purify the air and lower the temperature of the chicken house. When disinfecting chickens, it is best to use a disinfectant with a broad spectrum, high efficiency, no toxic side effects, and high adhesion.
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