Summer temperatures are high. Without precautionary measures, pregnant sows suffer from loss of appetite, reduced feed intake, increased body temperature and increased respiratory rate. This leads to poor somatic malnutrition and decreased milk production in pregnant sows. There will still be stillbirths. Doing a good job of summer feeding management can avoid the economic losses of the farmers. (1) Excessive anti-refrigeration temperature For pregnant sows that pass the summer, the piggery shall be provided with shade, ventilation and other equipment to prevent the occurrence of heat stroke and other hot stress diseases. Sprinkle cool water into the house on hot days, but do not spray directly on the sow. When the temperature reaches 30°C or above, measures such as installing air conditioners and electric fans may be adopted to rapidly reduce the temperature to prevent stillbirth. (2) Professional households with a high number of sow-preventing females against mechanical abortions should pay attention to reasonably arranging the rearing density of pregnant sows in summer. For example, in a 7 to 9 square-meter sow house, up to 4 in early pregnancy and up to 2 in late pregnancy, it is best to keep the animals separately, so as to avoid strong bullying and uneven feeding. The fetus does not grow neatly and can avoid biting and colliding with each other due to high temperature irritability, resulting in increased stillbirth or miscarriage. If there are grasslands nearby, the sows can be rushed to the event to increase the health of the sow. When the farrowing is carried out, the farrowing time can be shortened. (C) Prevention of disease transmission In summer, pregnant sows are prone to lice and lice, especially if they are born in the ear of pigs. Sows in later stages of pregnancy should be reduced for the first 3 days of labor, and only postpartum wheat bran porridge can be fed. The sow was disinfected and cleaned with 2% potassium permanganate solution before being transferred from the farrowing house and allowed to dry. At the same time cleaning and disinfecting the delivery room can ensure the healthy growth of the piglets after delivery. (4) Anti-mosquitoes, biting sows, mosquitoes, flies, and poisonous insects will not only affect rest, hinder the healthy growth of the fetus, but also cause diseases. Therefore, early in the spring and early summer, it is necessary to set up a gauze net to prevent mosquitoes. During the peak period of mosquitoes, feeding vitamin B1 once every 3 days and feeding 30-40 mg so that the sows can produce an odor that mosquitoes do not dare to approach; tomato leaves and mint leaves can also be smashed and juiced. Rubbed on the sow, has a good repellent effect, but also does not harm livestock. (e) Anti-environmental pollution: timely removal of excrement, regular disinfection, disinfection of drugs can be used to kill or sodium hypochlorite. Do not disinfect sows with quicklime or flammable soda because they are susceptible to damage to the pig. Feed the wet mix in the pig's trough, avoid leftovers as much as possible, and remove leftovers in time to avoid mildew. The trough is cleaned daily and dried in the sun.
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