Bird feathers are thick and have no sweat glands and are highly susceptible to high temperatures. With the increase of temperature, the feed intake of chickens decreased, and a series of physiological indicators were affected. As a result, the production performance of broilers decreased and mortality increased. In the past two years, due to the hot climate, the phenomenon of heat stress is more common, and the resulting losses are even greater. During the hot season, proper adjustment should be made from the nutritional level to reduce the loss of heat stress.
First, adjust the diet
During the hot season, broilers lost appetite and their feed intake decreased. It is generally believed that summer broilers should be fed with high-protein feeds to ensure the nutritional needs of broiler chickens. This is not the case. This is because broilers can quickly meet the nutritional needs of broilers after they have rapidly ingested high-protein diets, and then broilers are less willing to eat or even refuse to feed, resulting in insufficient energy feed intake for broilers, which in turn is not conducive to the growth and development of broilers. . Conversely, if you raise the energy level of broiler feeds and reduce the protein levels in broiler chicken feed, broilers must have no more than enough feed to meet the protein requirements to meet the protein requirements of broilers, which makes broilers more Ingestion of energy feeds increases the body weight of broilers, which is a much better result than raising the protein content of broiler feeds.
Second, adjust the feeding
When the ambient temperature is too high, the number of feedings can be appropriately reduced. The general approach is to stop the feeding at the hottest time of the day, use the early morning or nighttime feeding, and use the early morning or nighttime feeding to reduce the body temperature and increase the use of feed. rate.
Third, acid-base balance
During the hot season, the body's breathing is accelerated to expel excess heat from the body. As a result, large amounts of carbon dioxide are expelled, and the acid-base balance in the body is destroyed, causing the pH of the blood to rise. In severe cases, hypokalemia and respiratory intoxication occur. Solution: You can add 0.15% or 0.3% potassium chloride, or 0.25% citrinonic acid to your drinking water, or add 0.5%-1% calcium chloride or 0.25% potassium chloride to your diet. .
Fourth, add multidimensional
When broilers are under heat stress, increasing dietary vitamin levels can effectively help broilers to get hot. The commonly used heat-stress-resistant vitamin is VC, and 200 mg of VC is added per litre of drinking water. Increasing the VC content in the diet can also increase the heat stress resistance of broilers.
Fifth, add drugs
In heat stress, in order to reduce unnecessary activity and energy consumption of muscles, sedative drugs are often used to inhibit central nervous system and body muscle activity to reduce the effects of heat stress. Adding antibiotics to beverages can prevent and treat diseases, increase daily weight gain and improve feed conversion rates, and increase gastrointestinal absorption.
Six, other methods
To ensure that broilers drink cold water, feeding cool feed such as roots, tubers, and melons can also reduce heat stress.
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