Core Tip: The following article introduces pig farmers to the method of promoting high yields of multiple sows during the pig raising process.
Strengthening sow rearing management
Sows should be fed with roughage during the rest period, mid-pregnancy, and post-lactation period, and be fed properly with green feed. Sows should have adequate supply of protein, minerals, and vitamins during the early stages of pregnancy, late pregnancy, and early breastfeeding. At the same time, it is necessary to provide the sow with a relatively stable living environment, and to minimize the stress response caused by transfer, drive, and the like.
Do a good job of giving birth to a sow
The sow is cleaned 5 to 10 days before delivery and sprayed with 10% to 20% fresh lime water. The sows are sterilized with 2% to 5% of the pregnant women's abdomen, breasts, and pus. After the sow has given birth, the mucus in the nose of the piglet must be removed in time to tear off the membranes. For juvenile piglets, it can be used to pat the chest, lift the hind legs or use alcohol to punish the nose. For the difficult-to-produce sows to do a good job midwifery, so that the sows will have a smooth delivery. In addition, heat preservation is especially important for newborn piglets. When the piglets are born, the temperature of the tillers must be maintained at 26°C~32°C.
Sows have to breed during lactation
Piglets should be weaned at 35 days to 40 days of age. In general, aphrodisiac is given to sows 3 to 5 days after weaning. After sows are estrus, they must be bred immediately to make them pregnant during lactation to increase litter size.
Arranging the breeding season of sows reasonably
It is best to breed in April to May, and to breed again from September to October. This will enable sows to breed in spring and autumn and avoid cold and hot weather.
Timely breeding
Under normal circumstances, from 19 hours to 30 hours after the estrus, the swollen areas of the vulva begin to subside, and a filiform mucus emerges. When the sow's hindquarters are pressed, the sows will stand still and the breeding time should be timely. Precocious sows should be bred at 7 months to 8 months of age and weighing more than 100 kg.
Breeding methods and artificial insemination
According to pig e-net users, we must use double matching (that is, the first match and the 12-hour interval match), which can significantly increase the sow fertility rate and litter size. If artificial insemination technology is used, semen of healthy boars should be used. Each milliliter of semen needs more than 40 million sperms, and sperm motility is above 0.6. The equipment should be strictly disinfected and the second insemination should be performed 12 hours after the first insemination.
Strengthening childbirth management
Sows are susceptible to miscarriage within 9 days to 13 days after mating and 21 days before delivery. The management of fetuses should be strengthened. Try to feed them with protein, minerals, vitamin-rich concentrates and succulent green feed. Do not feed frozen, Bad rotten spoilage feed. Pregnant sows should try to avoid mechanical stimuli such as crowding, biting, slipping, whipping, scaring and so on. Farm breeding must have detailed records to avoid inbreeding. The prevention and treatment of epidemics should be well done in the pig farms. In particular, the prevention of Japanese encephalitis, influenza, and brucellosis should be well done and timely treatment should be found. Pregnant women with abortion should be immediately injected with 15 mg to 25 mg of progesterone and should be given a sedative orally.
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