The cold weather in winter, the use of warm circle pigs is a good way to save energy in the cold season, but also to keep warm, but also to prevent moisture and dehumidification, but also to increase the efficiency of pig production, to meet the pig production and development, improve the efficiency of pig raising new technology .
First, the advantages of warm room pigs
Pigs are warm-blooded animals, can only normal growth and development under the appropriate temperature conditions, in order to give full play to its productive potential, to achieve more survival, rapid growth, more weight gain, less consumption of materials, increase production and efficiency purposes. The suitable temperature for pigs is:
1, newborn piglet: 1 to 5 days of age, 30 ~ 32 °C; 6 ~ 10 days of age, 28 ~ 30 °C; 11 ~ 14 days of age, 30 ~ 25 °C; 15 ~ 30 days of age, 22 ~ 25 °C. 2. Finishing pigs: 20 to 60 kg, 21 to 22°C, 61 to 100 kg, 18 to 20°C.
If the temperature of the house is lower than the above-mentioned suitable temperature, the first-born piglets can be frozen, frozen, frozen, or overwhelmed after 2 hours at a temperature of 1°C; they are born at a temperature of 13-24°C. After 1 hour, body temperature can be reduced by 1.7~7°C. Below the optimum temperature, when the temperature of the house is lowered by 1°C, 22-day-old pigs will have 22 grams more per head per day, and 7-day-old piglets will consume 120 grams more per head per day; growth-finishing pigs will have less per head per day. The weight gain is 17.8 grams, and 25 to 30 grams of material is consumed per kilo of weight gain. When the temperature dropped below 4°C, the rate of weight gain decreased by 50%, and even the weight gain stopped. The weight gain per kilogram was more than 2 times higher. From the above analysis, in order to improve the survival rate of piglets in the cold, cold season, fast growth, more weight gain, less consumption of materials, and increase efficiency, we must adopt the technology of warm-ring pig raising.
Second, the construction and reform of the warm circle
The construction and transformation of the warm circle should be based on local conditions and local materials. Commonly used methods for the construction and transformation of warm loops are:
1, the construction of underground heating circle. In the north or south or north with high slopes, steep cliffs, high walls, buildings and other leeward places, dig deep 1.5 to 2 meters, rectangular (long, wide depending on the number of pigs) pit, bottom The ground is high in the north and south in the south, and is divided into two laps in the south and north. The north circle is 0.3-0.5 meters higher than the south circle. The pit is surrounded by bricks or stones, leaving a decanting vent that can open and close in the south wall. The northern wall of the wall should be raised above the ground, so that the north and south walls will be 45 slopes. On the north and south walls, every 30 to 40 centimeters, take a 4 to 5 centimeter in diameter, smooth, parallel wood, wood, etc., and cover the rod with high-strength plastic film. On the membrane, a wood rod with a diameter of 2 to 3 cm is used to clamp the membrane firmly with a wood under the membrane, and all sides are tightly sealed on the wall with grass mud. In the southeast corner, a convenient and compact plastic door is provided to facilitate the entry and exit of breeders.
2, on the ground heating loop reconstruction. There are two types of reconstruction methods;
(1) Change to a sloped plastic film ring. On the open side of the wall, the building is made of north-south-low, 45-slope, until the wall of the eaves. It is sealed with plastic film on the wall like a warm ring, and the entrance or excrement opening is also set.
(2), changed to a curved plastic shed housing. With a diameter of 3 to 4 centimeters in diameter and a length of 4 to 5 centimeters (depending on the distance between the housing and the height of the eaves), the bamboo poles are bent into an arc (the center of the bamboo pole is perpendicular to the eaves parallel to the eaves), and both ends are inserted on both sides. On the wall, from the wall under the eaves, they should be paralleled every 20 to 30 centimeters in parallel so that they are parallel to each other; they start from the center of the bamboo dome and use straight bamboo or wood rods from north to south. Connected perpendicularly to the bamboo poles at the top of the arc, at their vertical and horizontal junctions, the two rods are tightly tied together with wire. At this point, in the middle of both sides, every 20 to 30 centimeters is still tied in parallel. On the basis of the above, the high-strength plastic film is sealed on the top, flattened and tightened, and the joint between the membrane and the wall is closed with grass mud, and then every other 20-30 cm equally on both sides of the wall is nailed with a nail. The nylon rope is pressed on the arc film surface, and the two screws are tightened on the nail to prevent the film from being lifted by the wind.
(3) Change the windowless door to the pighouse with window door. In the pig house door and window, put on plastic film or glass sealed doors and windows, in the sunny side of the roof, change the skylight with plastic film or glass seal, the ground full of sunshine to shoot the pig house ground. (4) Add additional suites, nursery bars, and incubators. In the corner of the open circle, set up a suite that can both increase the temperature and keep warm, so that the sow will be born in the suite, the piglets will be in the room, or add a masonry guard fence and a wooden incubator. The interior is equipped with dry soft grass or heating facilities to allow the piglets to stay in the crate, use the heating facilities to increase the temperature, and use the heat distributed by the piglets themselves to keep warm.
3. Build a semi-underground warm circle. The construction of the semi-underground warm ring is basically the same as the construction of the underground warm ring, except that half of the wall of the house is exposed on the ground and a window sealed with a plastic film is installed in the sunny area.
4, modified plus warm circle. On the basis of the above mentioned housings, or in cave dwellings and tunnel pig houses, additional temperature-increasing facilities such as underground fire tunnels, warm fire walls, soil heating, infrared lamps, far-infrared hot plates, electric heaters, and warming umbrellas will be added. Use fuel or electrical energy to bring the temperature in the housing to the appropriate temperature.