A cold temperature suitable for pig growth: newborn pigs 32 °C ~ 35 °C, nursery pigs 20 °C ~ 26 °C, medium pigs and pigs 15 °C ~ 23 °C. The influence of low temperature on pig growth and weight gain is extremely serious. When the pighouse temperature is lower than the lower limit of the suitable temperature, the daily weight gain can be reduced by 17.8 grams for every 1 °C lowering; if the temperature decreases continuously below 4 °C, the weight gain Speed ​​can be sharply reduced by 50%, increasing feed consumption by more than 1 time. To this end, winter breeding fattening pigs and pregnant pigs should take comprehensive measures to keep warm (such as pigskin covered with plastic film, etc.). Feeding tiller pigs and nursery pigs should be heated by heating equipment, which can use geothermal heat, stoves, central air-conditioning and incubators. And other heating equipment to reduce the consumption of the body's metabolism in order to improve the efficiency of feeding. Second, fear of tide When the ambient temperature is low, the relative humidity will make the pig feel cold. This low-temperature and high-humidity environment will seriously affect the pig's production performance, especially for young pigs. In pigs in pig houses with high relative humidity in winter, the average weight gain was about 48% lower than that of the control group, and it was easy to cause diseases such as diarrhea and enteritis. Different pigs require appropriate relative humidity: 70% for finishing pigs with 50% to 70% for pigs, 40–80 kg for pigs, 80% for finishing pigs with 80–110 kg and 55%–80% for breeding sows. To prevent dampness in the pig house and ensure it is dry, it can be solved by strengthening ventilation, increasing light, increasing warm litter and other methods. If the temperature of water and material is 0°C, the temperature of the water and material should be raised to the level of 39°C. The body of the pig consumes 682 to 878 kcal of heat energy, which means that it takes 0.5 to 0.75 times a day. The kilogram of concentrate is consumed in vain to maintain body temperature. Winter sows feeding cold water can also cause miscarriage and other adverse consequences. Therefore, it is better to feed the pigs and sows in winter, and it is better to feed warm and warm water. It is advisable to keep the water temperature around 37°C. Philodendron Flower,Alocasia Flower,Calathea Flower,Cordyline Flower fanhua nursery , https://www.fanhuanursery.com