The suitable growth temperature of cold pigs is that the newborn piglet is 32-35°C, the nursery pig is 20-22°C, the middle pig and the big pig are 15-20°C. 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 daily weight gain decreases by 17.8 grams for every 1°C decrease; if the temperature decreases below 4°C, the weight gain rate decreases by 50%. Increase feed consumption by more than 1 time. Therefore, the winter barn should be strengthened to keep warm, reduce the metabolic consumption of pigs, and improve feeding efficiency. Fear of tide When the ambient temperature in the house is low, the relative humidity is high, which will seriously affect the pig's production performance, especially to the piglet. Piglets in pig houses with high relative humidity in winter have an average weight gain of about 48% lower than that of the control group, and are prone to diseases such as diarrhea and enteritis. Suitable for the growth of different pigs, piglets 50% to 70%, 40 to 80 kg of finishing pigs 70%, 80 to 110 kg of finishing pigs is 80%, breeding sows 55% to 80%. It can be used to prevent dampness and keep dry by ventilating, increasing light, adding warmth, etc. Fear of cold winter pigs, drinking water and feed temperature have a close relationship with pig growth and health. When the water temperature and material temperature are 0°C, the temperature of the water and the material is raised to a body temperature of 39°C, and the pig body consumes 682 to 878 kcal of heat energy, which means that 0.5 to 0.75 kg of concentrate feed per day is in vain. The ground consumption is to maintain body temperature. Therefore, raising piglets and sows in the winter, it is best to feed warm and warm water, the water temperature is maintained at about 37 °C. Fearing that pigs are most afraid of “dragon style†and “thief style†in winter, it will not only reduce the temperature, but also cause diseases such as swine cold, stroke and rheumatism. The pig house in winter must block wind tunnels, hang straw curtains, paste windows, close doors and windows, prevent rat holes, cracks, gaps, broken tops, doors, window seams, etc. in the circle from blowing into the “thief windâ€, affecting normal pigs. Growth and development. Fear of disease If the pig house is cold in winter, has high humidity, poor hygiene, and poor ventilation, the pig is susceptible to disease. Therefore, we must strengthen the feeding and management, keep the ventilation and cleanliness of the pens, clean and dry, and regularly disinfect the pens, it is best to use the flame disinfection method. At the same time to achieve "five observations", that is, the concept of form, view of the spirit, view of food intake, observation of excrement, observation of breathing, once the pig disease should be diagnosed in time, as soon as possible isolation treatment.
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