Breeding management of laying hens in high-temperature and high-heat season
Egg laying period should create a good environment, in order to maintain normal egg production performance, which is a very important issue in the chicken industry, high temperature and high heat is a common environmental status after summer. In recent years, with the increase in global temperatures, the relatively cool northern regions have also been affected by high temperature and high heat. Therefore, it is a new task to raise and manage laying hens in high-temperature and high-heat seasons and should attract the attention of the chicken industry. High-temperature and high-heat refers to the performance of chickens when the ambient temperature exceeds 28°C: 1. Feed intake decreases, drinking water increases, and feces become thinner. 2. The body's endocrine reduction, eggshell thinning, protein thinning, soft shell eggs, shelled eggs increased. 3. Mouth breathing, wheezing, and severe respiratory alkalosis. 4. Shortness of breath, metabolic disorders, prostration, dizziness, and sudden convulsions. Strengthen feeding and management, create a good environment for laying hens under high-temperature and high-heat conditions, and maintain the health of the flock. The following measures can be taken: 1. Construction of the house: The house must be kept in a suitable environment and the air is fresh. Internal air circulation is generally combined with temperature difference ventilation and mechanical ventilation. The temperature inside the house is within 24°C depending on the temperature difference. When the room temperature is above 24°C, it depends on mechanical ventilation, preferably vertical ventilation. The air inlet can be equipped with cold water or wet curtain device. The lower the inlet temperature, the better. It can also be taken Drum cold air device. 2. Strengthen chicken house environmental measures: There should be a main air channel around the house - open land, open land with flat or turf, and no use of cement and brick paving. This will result in increased heat and heat concentration. Trees can be planted on the sunny side of the air inlet or shading equipment, never forming a high wind wall and narrow sheds calm wind field area. 3. Improve the ventilation conditions: Ventilation is in the indoor high temperature conditions, there is a sense of air circulation, there is no dead ends. The important thing is to make chickens adaptable to the changes of high temperature and high heat in the natural world and have a certain adaptation time. This is a very important task to prevent the first heat wave attack. It must be done well and carefully. 4. Improve management: In the hot and hot season, controlling the Sherwin is the basis of all management, and the core is to relieve or alleviate the high temperature and high heat stress response. It is necessary to determine the group feeding and management. Pay attention to the flock and if there is any abnormality, take timely measures. To increase the number of feedings and feeds in the morning and evening, you can also use cold water to mix and increase the light time. Feeding is not allowed during high heat hours, reducing the amount of flock exercise and keeping the birds in a quiet state. To avoid noise interference, feeding, feeding, cleaning, picking eggs and other actions should be light to prevent frying. After vertigo occurs, soak the chickens with cold water and transfer them to a cool, ventilated place. At the same time, add 1-2 drops of pomegranate to each chicken, or 4-5 capsules. 5. Improving nutritional conditions: Economic losses due to high temperature and high heat are the result of reduced feed intake and reduced egg production. Therefore, improving nutritional conditions and maintaining its body heat balance are important conditions. Raising the protein to energy ratio generally increases the metabolic energy by 10% and the crude protein by 25%, which can achieve the conventional feeding effect. To increase energy, 10-20 kg of fat per ton of feed can be used, and the method of increasing protein to increase plant protein can be mainly used, and the content of methionine (58%) can also be increased. At the same time adjust the electrolyte balance, supplement vitamin C, increase sodium bicarbonate and sodium chloride, mainly by adding vitamin E (150mg/ton).
Second, we must increase anti-stress drugs. Adding 40 mg bacitracin zinc per ton of feed can reduce calories. It is also possible to add virginiamycin 10-15 mg/kg to increase feed conversion and survival. In addition, organic chromium also has a significant role in fighting high temperatures and heat.
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