Feeding and management skills of sows

Make a sow give birth during the day

When 1~2ml was injected into the neck muscle of sows at 8: 9 a.m. on the 1st and 2nd day before parturition, 98.2% of the sows were delivered in the daytime the next day, and the survival rate of piglets increased from 90% to more than 98%.

Make the sow give birth in the spring and autumn

Sow delivery is arranged in spring and autumn to avoid cold winter and hot summer, which can improve the survival rate of piglets and achieve 5 births in 2 years. The first child can be mated from November to December, and the next year from March to April, and the second child will be mated from May to June and from September to October.

Skillfully calculate the due date of sows

The normal pregnancy period of sows was 108-120 days, with an average of 114 days. The method of calculating the expected delivery date of sows is: mating date plus 3 months plus 3 weeks and 3 days. For example, the sow breeding date is April 10, the expected delivery date is 4-3-7 (month), 10-21 (3 weeks) + 3 (days) = 34 days, that is, August 3.

Early diagnosis of pregnancy in sows

When the sows were bred for 3 or 4 weeks, the low back between the 9th thoracic vertebra and the second lumbar vertebra was pressed with thumb and index finger, and those with slightly arched spine became pregnant, while those with depressed back were not pregnant.

Increase the litter rate of sows

Sows were fed with compound vitamin B, carotene 400mg and vitamin E 200 mg per day from 3 days after weaning to estrus. After mating, the dose was reduced by half, and 2 more litters could be born per litter for another 3 weeks.

Sow artificial aphrodisiac

For sows without estrus for a long time, 20ml of boar semen was taken, semen was slowly injected into the uterus of sows with vas deferens, and the vas deferens was constantly turned and twitched back and forth, while a small amount of semen was sprinkled on the nose of sows. Strengthen the feeding, about 4 days can be estrus mating. Or intramuscular injection of 100 units of chorionic gonadotropin into sows weighing 75-100 kg, or subcutaneous injection of pregnant horse serum 5ml, oestrus can be achieved within 4-6 days.

Sow lactation

Rinse the postpartum placenta of sows with clean water, cut into small pieces of 4~5cm and wide 2~3cm, simmer for 1 to 2 hours, mix placenta with soup into gruel, and feed the sows twice a day from the second day after delivery until finished. Sows that have always been lacked of milk are fed with 30g of Mutong, 20g of Angelica sinensis and 30g of Radix Astragali, together with cooked placenta, with excellent results.