The temperature of pigs' drinking water and foodstuffs in pigs has a close relationship with pig growth and health. Pigs are suitable for drinking cold water in the summer, and drinking warm water in the cold season has a good effect, can promote the pig's feed intake, significantly increase the pig's daily gain and reduce the rate of diarrhea. Especially piglets, when the drinking water temperature is lower than the body temperature, not only the pigs need extra energy to increase the temperature of the intake water, but cold stress can also cause pig stomach ulcers, indigestion and other diseases. The Guangxi University experiment proved that suckling piglets drink warm water at 37°C that is supplied by a multi-function constant temperature waterer, which is 39.4g more than pigs that drink normal temperature tap water, and the weight gain is 0.82kg, and the average head consumption is 0.34kg. The diarrhea rate is higher. 20% lower. In cold seasons, water temperature is also important for sows. If sows are fed water and materials at a temperature of 0°C, 0.5kg of fine material per day is wasted on maintaining body temperature. Winter sows feeding cold water can also cause miscarriage and other adverse consequences. The suitable temperature for pigs drinking in the cold season is growing and finishing pigs and pregnant pigs at 16-20°C, nursery pigs at 20-25°C, nursing sows at 25-28°C, and suckling piglets at 35-38°C.
There are many factors that affect the pig's water requirement, such as temperature, feed type, pig size and physiological status, all have important influence on the water demand of the pig. Under house-feeding conditions, one head sow will need to supply 75 to 100 L of water per day, pregnant sows, boars and bred pigs will be 30 L, and young and fat pigs will be 15 to 20 L. It is extremely important that weaned pigs drink enough water within the first 2 weeks after weaning, because eating high protein diets at this time requires a higher amount of water to excrete excess nitrogen, so as to ensure feed intake and reduce morbidity. In particular, it is necessary to ensure that the water supply to the nursing sow in summer is about 40 kg per day. A lack of water will result in a decrease in feed intake and a decrease in milk production.
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