How to raise pregnant pigs in summer

Pregnant sows are extremely sensitive to external stimuli. Heat stress caused by high temperature is very easy to cause abortion and stillbirth of sows. 20 days of early pregnancy and 30 days before delivery are dangerous periods of stillbirth and abortion, so it is necessary to strengthen feeding management to ensure the safe production of pregnant pigs.

Create a cool environment to thicken the roof, grass curtains and other materials with good thermal insulation, in order to isolate the thermal radiation of the sun, which can reduce the radiant heat by more than 40%. The roof can be cooled by spraying water at noon when the temperature is above 30 ℃. In addition to opening the north and south doors and windows of the pig house for ventilation, the exhaust fan should also be used to increase the air flow to take away the heat of the pig and cool the pig. Use cold water spray or wet curtain to cool down if necessary. When the temperature is above 35 ℃, the pig can be showered with cold water or brushed with brushing. When the weather is hot again, you should increase the number of showers and brushing the pig body to keep the sow body from overheating. In muggy weather with low wind volume, pregnant sows should be rushed to the playground in the shade of trees to have a rest. Many trees are recommended in the pig farm to form a cool microclimate. It is necessary to remove manure frequently in the pig house, which can not only eliminate pollution, but also maintain the hygiene of the pig house, but also avoid the heat production of fecal fermentation and increase the temperature of the pig house.

Pay attention to the feeding of pregnant sows within 20 days of pregnancy and 30 days before parturition, it is necessary to strengthen nutrition supply, improve nutrition level, and meet their needs for protein, vitamins, minerals and trace elements. To the later stage of pregnancy, not only to meet its nutritional needs, but also to meet the quantity requirements, 24 grams of concentrate can be added every day to meet the needs of rapid fetal growth and improve birth weight. In addition to normal feeding, sows should be fed more appropriately when the temperature is low in the morning and evening. At the same time, more green fodder with less fiber should be fed, and roughage with more fiber and rice bran should not be fed, so as not to increase body heat. When the diet is low in energy, 3% or 5% fat can be added. Hot weather in summer, pigs thirsty to increase, drinking a large amount of water, should be a large supply.

Strengthening the management of sows and protecting pregnant sows are particularly sensitive to sudden changes in the environment. Exercise, feeding, catching, overheating and so on are all bad stress factors, which may cause miscarriage of pregnant pigs. Normal life rules must be established, and pregnant pigs should not be driven quickly. Single-circle, single-tube and single-feeding should be used to prevent pigs from biting each other and causing miscarriage.