First, to improve the ventilation of pigs Most of the pneumonia will occur in the bad air environment. Pigs raised outdoors rarely develop pneumonia, because a large amount of fresh air plays a role. In winter and spring seasons, it is necessary to prevent thief winds because thief winds are more likely to cause stress. In addition to considering the ventilation of the whole building, the strength of the local wind currents must also be considered. High-speed local air flow can cause pigs to feel cold and cause stress. The standard is that the wind speed at the level of the pig should not exceed 0.3 meters per second. If the position of the air inlet is improper, the door is not closed, the doors and windows are broken, or there are holes in the wall and the curtain, the wind speed will increase and the pig will develop respiratory diseases.
Second, control the temperature in the house The ideal temperature conditions, the pig will feel comfortable at any time. Low temperatures can cause stress, reduce pig immunity, and increase morbidity. The critical temperature of pigs is 32~35°C for newborn pigs, 29~24°C for 4~10kg piglets, 25~15°C for breeding pigs (finishing pigs) after 3~4 weeks of weaning, and the lower critical temperature for adult pigs is 12°C. Production should ensure that the newly weaned pig house is sufficiently warm, and if necessary, the pig house should be warmed up 24 to 49 hours before entering the pig. The demand of pigs for temperature decreases with age, and farmers plan to gradually cool down and implement them according to strict regulations.
Third, do a good job of regulating the humidity of the pig to the humidity of the house there are certain requirements, relative humidity below 50% is too dry, more than 75% too wet. If the humidity in the house is too low, pigs can easily cause respiratory diseases. The thermal conductivity of moist air is 10 times that of dry air. If the humidity in the house is too high in winter, it will increase the heat that the pig body emits, making the pig colder. In the production, it is possible to reduce the humidity in the house by means of enhanced ventilation and the placement of quicklime blocks in the room.
Fourth, a reasonable breeding density Breeding density is not only related to the pig's development status, but also has a close relationship with the pig's pneumonia; the concept of density varies depending on the climate, although the winter may be slightly larger, but there should be a total within each pen Two-thirds of the dry ground area is used for lying and resting pigs. Whether on the concrete floor or bare ground, the sleeping area must be kept clean, dry and comfortable, thereby reducing the pig's stress. It is critical to reduce the rearing density of weaned piglets. The experts recommended the following stocking densities: weaned piglets: 3 heads per square meter; finishing pigs 0.75 square meters per head.
Fifth, the scientific concept of drinking water First, we must pay attention to drinking water disinfection, in order to reduce the pathogenic effects of water on pigs, reduce the incidence of pigs, improve the health of pigs. It is best to use groundwater or water that does not contain harmful substances and microorganisms to meet the needs of pigs. Second, do not allow pigs to drink ice water. Winter sow pregnant sows drinking ice water can cause miscarriage, causing gastrointestinal diseases or other diseases. Therefore, we must constantly provide warm and clean drinking water, both to prevent the occurrence of patients and to ensure the growth and development of pigs.
Feeding High-Quality Diets In the cold winter and spring seasons, it is particularly important to provide a complete diet for the pigs. Farmers can reasonably select suitable premixes for pigs of all ages according to the weight of the pigs raised in their pig farms, and refer to the formula recommended by the technology to meet the nutritional needs of pigs in winter. Ice-chilled feed has a greater impact on the pigs during the winter season. Feed as much as possible with dry powder, or use warm and hot water condiments to feed, if possible, provide clean, warm water for pigs to drink freely. In winter, when the pupa is short and long night, the pigs have a long fasting time in the evening. During the night, they are fed an overnight diet to feed the pigs with enough nutritious and comprehensive diets, which is beneficial to the increase in daily weight gain and shorten the feeding period.
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