In hot summer weather, laying hens are prone to decline in feed intake, decreased resistance, etc. If the chicken house is in poor condition, the chicken body is difficult to dissipate. A slight oversight is more likely to lead to disease. Therefore, in order to improve the economic benefits of laying hens in summer and eliminate the adverse effects caused by stress to the maximum extent, comprehensive measures such as lowering temperature, adjusting the structure of rations, changing feeding methods, supplying refreshing fresh drinking water, and strengthening feeding management must be taken. To ensure stable production of laying hens at high temperatures and maximum economic benefits.
Do a good job of preventing heatstroke
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 chicken eggs and effective measures must be taken to reduce the temperature. The suitable 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 when the sun is in direct sunlight, the temperature of the chicken house is about 32°C. With the accumulation of heat and the evaporation of water, the humidity will constantly decrease, and it is extremely prone to drastic changes. The 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.
When the temperature exceeds the optimum temperature for laying eggs for chickens, all doors and windows should be opened, but barbed wire should be added to the doors and windows to prevent pests and birds. The brick house sprays cool water on the roof and installs a rotating nozzle on the roof to ensure that enough water pressure is sprayed on the roof surface. It is better to lay a layer of straw on the roof to make the roof stay in a wet state for a long time while driving. Fan, the effect is better, can reduce Sherwin 4 °C -6 °C. If there is no roof insulation system, it is better to paint white on the roof and south side, which can enhance the reflection and reduce the absorption of heat. The second method is to dissolve 0.5 kg of salt first with 46 kg of water, then add 40 kg of lime, 4.2 kg of white cement, and add 68 kg of water. Stir and paint or spray the roof and exterior wall to reduce the temperature of the house by 1.5°C-2. °C.
Adjust feed nutrition levels
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 inspect the feed intake of chickens and adjust the dietary nutrient levels to ensure that the energy needs of the laying hens are met.
Change the feeding method
At temperatures above 27°C, the feed intake of layer will decrease by 1.5% for every 1°C increase in temperature. Therefore, in hot and hot season, 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 eat at cool time and adjust the light at night to increase the chicken's excitability, and increase the number of feedings in the morning and evening and the amount of feed. 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.
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 100-300 mg of vitamin C to the diet, or add 100 mg of vitamin C per kilogram of water, drink it throughout the day; add 0.3% baking soda to the diet, and reduce the salt content of the diet; Hypokalemia is prone to stress, so add 0.2%-0.3% potassium chloride in diet or add 0.1%-0.2% potassium chloride in drinking water all day.
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