Because of the thick subcutaneous fat, fattening pigs prevent large amounts of heat in the body, and the sweat glands are degraded. They cannot disperse heat in the form of excessive sweat. Therefore, finishing pigs are very afraid of heat and are sensitive to heat stress. The optimum temperature for growing pigs is 15°C-23°C. When the temperature is higher than 25°C, appetite decreases, feed intake decreases, body temperature rises, respiratory rate increases, growth slows down and other symptoms occur. If it continues to be hot and hot, it may even appear. Heatstroke died. Therefore, it is very important to do a good job of finishing pigs in summer. 1. Strengthen the ventilation to open the door and window of the pig house to ensure air circulation in the pig house. Install a ceiling fan in the pig house to generate air flow in the horizontal direction to promote the temperature drop; if necessary, install the roof fan to discharge it upwards. Hot air, wall unit ventilation, so that the air across the pig house and increase ventilation. 2. Lowering Sherwin's temperature Wash the floor with cool water, cool the walls, and connect the water pipe to tap water. Rinse the water several times a day in the afternoon or in the afternoon. Use no water to reduce the temperature. Water can also be used to reduce the temperature of the pigs, and the body can be sprayed or showered twice a day for 2-4 times to help the pig to dissipate heat. The temperature of the first-existing well is low, and it is necessary to dry it in the sun for a while before it can be used to flush the pig body. This will not only cool the heat but also make the pig clean. However, washing the pigs with water should be arranged before feeding, and should not be washed within 30 minutes after feeding. The pig's head should not be suddenly flushed with water to prevent the blood vessels of the department from contracting and shocking. 3. Set up shade trees shaded with shade on the sunny side and air inlet side of the pig house so that the sun is shielded by the shade. After the air is cooled, it enters the pig house and the temperature of the pig house can drop by 2°C to 3°C. It is also possible to hang sheds around pig houses and plant vines such as grapes. The main vines climb down the pergola. 4. Greening and Cooling Planting large-leafed crowned trees such as Davidia involucrata, Farnnon, and Populus tomentosa on the south side of the pig house, and planting vines on the ground can reduce radiation heat. 5.Supplying drinking water in summer with high temperature, the body temperature of pigs will also be affected. If the drinking water is sufficient, the body temperature will not rise under the regulation of water; the pig can expel respiratory air from the lungs to the body through rapid breathing. Take away some of the body heat. In summer, pigs drink 23%-25% of their body weight, and 0.5% saline can be used to regulate body temperature. Keep enough clean water in the sink to keep water off. 6. Adjusting nutrients When the ambient temperature exceeds 25°C, in order to reduce self-heat production, the feed intake of pigs to the energy feed is reduced, so that the intake of other nutrients is also reduced, which requires diets with higher nutritional levels. make up.
