The effect of low temperature on pig growth and weight gain is more serious. When the temperature of the pig house is lower than the lower limit of the suitable temperature, the weight gain is reduced. If the house temperature falls below 4°C, the weight gain rate is reduced by 50% and the feed consumption is increased by more than 1 time.
First, reserve, cold insulation for pregnant pigs
1. When the temperature is above 10°C, handle the window tents flexibly to make the pigs as comfortable as possible.
2. When the temperature is lower than 10°C, use color stripe cloth ceiling insulation.
3. When the temperature is lower than 5°C, use color strip cloth to build the house in the house, which can increase the temperature in the house 5 to 70Co4. When the temperature in the pig house is lower than 5°C, the mat sack method is used to prevent the belly of the sow from getting cold.
Second, the branch housing cold insulation
Pigs are particularly poor at cold stress. The newborn pigs are in a 13 to 22°C environment, and their body temperature drops by more than 1.7°C for 1 hour.
1. When the temperature is below 27°C, the delivery room will be lifted to open the tent with a flexible switch window to make the sow herd as comfortable as possible. The pigs will be insulated by “incubator + infrared heat lamp + mat sack or insulation board†when the temperature is lower than 15°C. Houses in houses are to be built with color strip cloths; heavy snow and ice disaster weather or temperatures below 0°C for more than 3 consecutive days, and other methods of raising temperature should be adopted at night.
2. Pigs 1 to 3 days old: Suitable temperature 32 to 35 °C, less than 27 °C in the plot need to put down the curtain to close the window, the temperature of the incubator is lower than 28 °C, according to the behavior of the pig, such as in the incubator When you hit a pile, you need to turn on the heat lamp. The infrared lamp should be suspended at a height of more than 0.45 meters above the floor of the pig activity area. According to the indoor temperature, 100W is used to wear 150W, 200W, and 250W) infrared heat lamp, so that the temperature inside the heat box is relatively stable (the same below).
3. Pigs 4 to 7 days old: The suitable temperature is 28 to 32°C. When the temperature in the house is lower than 25°C, you need to put down the curtain to close the window. When the temperature of the incubator is lower than 24°C, it is necessary to turn on the heat lamp according to the behavior of the pigs, such as playing in the incubator.
4. Pigs 8 14 days of age: suitable temperature 26 to 28 °C. When the temperature in the room is lower than 26°C, lower the curtain to close the window, and lower the temperature lamp at 23°C.
5. Pigs 15 25 days of age: suitable temperature 24-26 °C. When the temperature in the house is lower than 24°C, lower the curtain to close the window and lower the holding lamp below 22°C.
Three. Conservation nursery insulation
1. 1 to 5 days after weaning: suitable growth temperature 26-28 °C, weaning the day to focus on the status of the pigs, so that the temperature within the premises is slightly higher than the temperature 1 day before weaning, reducing weaning stress on the pigs.
2. Close the window when the temperature is lower than 24i, and turn on the heat lamp below 22i. Use less than 20i to build the house in the house with color strips. At the same time, increase the number of heat lamps to open, and lower the number of high temperature nursery bars below 15i. The pig is lying on a wooden plank or an old rug to prevent bunching.
IV. Breeding cold insulation
1. When breeding 20-30kg of pigs at temperatures above 15°C, or when raising pigs above 30kg at temperatures above 10°C, flexibly dispose of the window tents to make the pigs as comfortable as possible; at temperatures below 15°C, use double The curtain is insulated, that is, a curtain is added outside the door, and a layer of plastic film is added outside the window.
2. When the temperature is lower than 5°C, the color of the ceiling of the pig house is used for insulation and the temperature inside the house can be increased by 2-3°C. If the temperature in the house is below 5°C, add 15-20 cm thick sawdust shavings or rice husks and hay on the ground cot.
V. Auxiliary measures for cold insulation
1. The location of the pig house should be in a place where the terrain is high and “dry†and sunny. It is recommended to use plumbing geothermal or electric warm geothermal technology for the newly-built pig farms, and use thermal insulation structures and materials for the roof walls.
2. Raising the stocking density: The breeding density of nursery houses is increased by 30%, medium and large pigs can be appropriately increased by 20%, and the indoor temperature can be increased.
3. Pay attention to moisture, so that "six essentials": First, to prevent drip, leakage, snow leakage; Second, groundwork for wood, sacks or hay; Third, the training of pigs designated defecation urination; Fourth, to make the pig house ground Above the surface of the house, it is best to use triple soil to prevent flooding; Fifthly, remove pig manure and pig urine in time to eliminate the damp roots of the pig house and reduce the generation of harmful gases; Sixthly, absorb moisture with the adsorbent, and when the humidity of the pig house is high, available Adsorption of moisture by adsorbents such as "lime" charcoal.
4. Attention to wind protection: The pig is most afraid of “thief wind†in the winter. The northwest windward wall of the pig house must have no air intakes such as gaps, crevices and rat holes. It is best to plant evergreen trees on the windward side of the pig house to facilitate wind protection in winter.
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