How to breed sows and boars

Artificial fertilization. Artificial insemination is to extract boar semen by artificial method, and then transfuse it into sow uterus to make sow pregnant. Boars can inseminate 3 ~ 8 sows at a time. Artificial insemination can reduce the number of boars, save feed, reduce feeding costs and improve the utilization rate of boars.

Artificial insemination can make full use of excellent boars in areas with inconvenient transportation, and can solve the contradiction between boars and sows with large body differences and difficult mating. Conducive to variety improvement and reduce the spread of diseases.

Extended data:

Key points of sow feeding:

(1) causes sows to give birth during the day.

In the morning of 10- 1 1, 1, 1 day before delivery, 1-2 ml prostaglandin injection was injected into the neck muscles of sows, which could make 98. 2 [2]? % sows give birth the next day, the effective rate is as high as 100%, and the survival rate of piglets is over 98%.

(2) Let sows give birth in spring and autumn.

Arranging sow delivery in spring and autumn can improve the survival rate of piglets and realize five births in two years. The first birth can be arranged in June11-June 65438+February, and the baby will be born in March-April of the following year; A second child will be born in May-June, and a baby will be born in September-65438+10.

(3) Improve the farrowing rate of sows.

During the period from 3 days after weaning to estrus, sows were fed vitamin B complex, 400 mg carotene and 200 mg vitamin E every day. After mating, the dose is halved and fed for another 3 weeks, and each fetus can give birth to 2-3 more.