Four techniques of raising pigs in winter

? A plastic shed will be built as soon as it is built. Build a plastic shed in the enclosure. The plastic shed has good light transmittance, can gather temperature, and can increase the house temperature by about 5-7 ℃. At the same time, the plastic shed has the characteristics of low investment, simple manufacture, quick effect and so on. Farmers can generally raise pigs according to the enclosure model, adjust measures to local conditions and simplify according to bad conditions, and buckle and build ridge-shaped, umbrella-shaped, arch-shaped or single-slope sunny plastic greenhouses above the huts. Leave a movable ventilation window above the south for temperature adjustment and ventilation in time. The light transmission and accumulation temperature of the plastic shed can increase the house temperature by about 5 ℃, which is beneficial to the growth and weight gain of pigs. After the beginning of winter, the piggery must block the wind tunnel, hang grass curtains and paste windows to prevent the rat holes, cracks, gaps, broken tops and other tuyere blowing into the "piercing wind" and "thief wind".

The second guarantee is that the pig house is insulated and kept dry.

① piggery with insulation layer. The height of the enclosed pig shed ceiling is 1.8-2 meters from the ground, with sawdust and rice husks on the shed, and grass on the ground for pigs to lie down. A vent is left in every two rooms of the ceiling to discharge ammonia and moisture from the house.

Keep the ② piggery dry. The greater the humidity in the pigsty, the colder the pigs feel, and it is easy to cause skin diseases, respiratory diseases, infectious diseases and parasitic diseases in pigs. In order to prevent moisture and rain, the house should frequently change hay and loose soil, let pigs defecate and urine at a fixed point, keep pig recumbent clean and dry, and provide a comfortable living environment for pigs to promote the growth, development and health of fattening pigs in winter.

The third increase is to increase the feeding density, add the bed board and increase the feeding times.

① increased feeding density. When the feeding density is high, the area of each pig is reduced, and each pig can be considerate to keep warm when lying down. At the same time, when the pig feeding density is high, their body heat dissipation also increases, which helps to increase the temperature in the pigsty.

Add bed board to ②. In the piggy stage, where there are conditions, it is best to use warm bed boards such as wood, bamboo and thickened fibreboard, and cement precast boards can be laid where there are no conditions.

③ increased the times of feeding. The purpose of increasing feeding times is to relatively increase feed intake in order to fill the weight deficit caused by fat and muscle metabolic heat production in pigs caused by low temperature. Where there are conditions, it is best to eat freely. In the place of regular feeding, one more feed can be added in the evening. It can increase by about 10% on the basis of the original feed energy level. The big pig is lower and the little pig is higher. Piglets can add fat high-energy feed, and big pigs can increase the quantity of common energy feed such as corn in the formula.

The fourth prevention is to prevent low temperature, bite rack, random feeding and epidemic disease.

① protects against low temperature. The most suitable temperature for pig growth is 15 ℃-25 ℃, and the normal growth temperature is generally above 8 ℃. In order to ensure the normal growth and development of pigs, the best way is to raise them in a greenhouse, that is, to cover the top of the ring with a thicker plastic film. The cover should have a slope of about 30 degrees to facilitate daylighting. If the circle temperature is too high at noon, it can be deflated and ventilated. If it snows, it should be cleared in time.

② anti-bite rack. In order to ensure the normal growth of pigs, feeding must be nutritionally comprehensive, lacking some or several ingredients, not only slow growth, but also "addiction", especially the lack of green feed in winter, "addiction" is more likely to appear. Therefore, it is necessary to supplement a variety of vitamins, minerals and trace elements in the feed, and divide the strong and weak into groups, size and circles, and castrate at the right time.

③ to prevent random feeding. In order to feed pigs, the feeding quality and feeding time should be stable, and the ingredients should be carried out according to different production performance and different growth stages. If you need to change the material, increase the amount or change the feeding time, it should be changed gradually. When feeding in winter, mixed feed is best fed raw and dry, and the water temperature should be about 25 ℃ when a small amount of water is needed. If you adopt the method of sparse feeding, the feed should be warm and hot, and should be added less frequently to prevent cold and frost. At the same time, pigs have a great demand for water, and if there is no water in the circle, pigs will even drink urine indiscriminately, which is bound to cause digestive tract diseases and other diseases, so pigs should be provided with warm and clean drinking water constantly.

④ to prevent epidemic disease. In winter, the temperature is low, the air is dry, and pigs are easy to occur. in order to ensure the healthy growth of pigs, the pens must be kept clean, clean and hygienic, and the pens should be brushed, disinfected or sprayed regularly or irregularly. Pigs should be vaccinated, and should be provided with commonly used drugs, early isolation and early prevention of diseases.