Pigs are warm-blooded animals, with thick subcutaneous fat, underdeveloped sweat glands, and slower thermal energy distribution in the body. They cannot regulate body temperature through skin sweat glands to evaporate heat; therefore, in hot summer heat, when the ambient temperature exceeds the optimum temperature for pigs, pigs are In order to resist heat stress, the amount of activity and feed intake are significantly reduced. The result is that pigs are very susceptible to falling and growing slowly, and even die of heat stroke.
1. The effect of high temperature on the heat stress of large pigs is difficult to eliminate. Only by accelerating the ventilation of the pig house and actually lowering the temperature of the pig house can the feed intake be increased. When the weather is hot, it prevents the occurrence of heat stress and heat stroke in the pig herds. When the temperature in the house exceeds 25°C, it should be combined with a cooling system in the house to reduce the exchange of gas inside and outside the house.
2. Appropriately increase feeding times (recommended not less than 3 times/day), and avoid feed during high temperature period, feed pigs at night can reduce daytime activities and increase sleep time of pigs; in addition, there is less external interference at night. The weather is relatively cool. After the pigs eat, they can sleep more than 18 hours a day, which is conducive to the growth of pigs. The feeding time can be performed before 7 o'clock in the morning and after 6 o'clock in the afternoon. Attention should be paid to cooling and sanitizing before and after feeding. At noon try to keep cool and cool green feed as the main ingredient. Adding 0.25% Odemann A to the feed can improve the pig's non-specific resistance, enhance the ability to resist heat stress, and promote the healthy growth of finishing pigs.
3, appropriate to reduce the breeding density (not less than 1.8 square / head). By reducing the rearing density, the pig's own heat production is reduced, thereby reducing the impact of stress, because the larger the pig's body weight, the thicker the subcutaneous fat, the greater the body heat discharge, the worse the heat stress resistance, and it is very easy to cause heat. The phenomenon of stress and heat stroke is very dangerous for people who are pursuing high-density rearing on hot days.
4, to ensure adequate clean and cool water, to avoid open-air exposure to the water pipe to keep the water temperature down. The pool should be shaded to ensure that the water source is not directly exposed to the sun and rainwater, leaves, etc., regularly check the water volume of the automated drinking fountains to ensure adequate supply of clean drinking water in summer high temperatures, the body temperature of pigs will also be affected, if sufficient drinking water, body temperature It will not rise under the regulation of the water; the pig can also breathe through the lungs with rapid breathing, and take away the excess heat from the body with water vapor. Water is the best solvent and transportation tool for all kinds of nutrients. Excluding the waste in the body also runs through the water. The pig's body water accounts for 1/3-1/2 of the weight. The summer pigs drink more water on a daily basis and can drink 0.5%. The salt water to regulate body temperature.
5. In time feed, adhere to the "advanced first use" principle, to maintain the freshness of the feed; can not backlog feed, to avoid feed mold, rancidity, affecting the feed intake of the herd.
6, do a good job in the cleanliness of the barn, improve the resistance of the herd, to engage in three times a day to clean the body, one at noon is particularly important, you can avoid because the higher the temperature, the faster the evaporation of pig manure fermentation, the stronger the ammonia smell to stimulate damage The nasal mucosa of pigs causes sneezing to induce the occurrence of lung diseases such as cough and respiratory diseases. Therefore, it is recommended to spray nursing care on the floor of the barn every two weeks to effectively absorb moisture and dehumidify and reduce harmful gases such as ammonia in the livestock house. .
7. In the case of severe feed reduction (0.5 kg/day/head lower than the normal feed amount), it is recommended to find ways to increase the feed intake. Adding vegetables or fruits can be added to increase feed nutrient concentration. The addition of 0.5% macrolide can effectively supplement the key trace elements and minerals needed for pig growth, significantly increase the growth rate of pigs, increase resistance to disease, and reduce heat stress.
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