During animal production, metabolic energy is essential. It maintains normal body temperature, activity, and basic metabolic needs of the animal. Metabolic energy does not make any sense for animal production, but the energy value above the metabolizable energy is needed for production when the total digestive energy intake is constant. Therefore, reducing animal metabolic energy can increase animal growth efficiency to a certain extent.
Dr. Han Yanming, director of poultry technology at the American Soybean Association International Project Beijing Office, pointed out that although 18-20°C is the optimum temperature for chickens, it is not economical for production. When the outside temperature is low, most of the feed consumed by animals becomes calories and is not produced. This phenomenon is common in northern China. According to experimental data provided by Han Yanming, layer chickens consume 25 calories per day at 20°C compared to 30°C, which is a 9g feed.
He introduced that in the United States, chickens are generally used infrared detectors to detect areas of lower temperature, and then improved, the temperature of the house is usually maintained at 27-29 °C, greatly reducing the metabolic energy.
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