Feeding and management of sows in the preparation period for breeding

   1. Adopt short-term optimal feeding to restore the body condition of weaned sows as soon as possible. For the sows that began to be fed 3 days before weaning, the sows were not fed on the day of weaning, and the body condition of the sows was restored as soon as possible from the second day after weaning to mating, and the daily feed was increased to 2.5 × 3 kg. When mating, it was immediately reduced to 1.8.

~ 2kg, feed according to Boyi. The sows which are excessively emaciated during weaning can not be reduced after weaning, and the optimal feeding should be increased in time after weaning, so that they can recover their body condition as soon as possible and breed in time. The pre-weaning condition of sows is quite good and even overweight sows should be fed less before and after weaning. Short-term optimal feeding should not be adopted after weaning, and exercise should be strengthened.

The picture shows: sow

   2, post-weaning sow 2

~ 5 days, 3-7 days after weaning, the sows begin to estrus and can be mated. The aborted sows are not mating for the first time, and the sows with genital tract inflammation are cured before mating, 2-3 times per estrus. More than 90% of sows should be considered normal in estrus within 7 days after weaning.

   3. Strengthen management to promote estrus: sows with excessive emaciation during weaning or sows with reproductive disorders often have no estrus after weaning. Vaccination and antibiotics are used.

At the same time of prevention and control, effective measures can be taken to promote estrus mating. Methods such as feeding and stimulating estrus and sow gregarious exercise can be used. When the above methods are ineffective, hormone can be used to induce estrus.

   4. Eliminate the unqualified sows and maintain the reasonable structure of the sows. The annual elimination and renewal rate of breeding pigs is about 1ap3, and the reasonable parity structure of sows should be as follows: 0, 2, 35%, 45%, 45%, 5, 6, 6, 45, 55, 55, 55, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, Sows with non-estrus after lactation, non-pregnancy after three consecutive estrous periods, uterine inflammation not cured by drug treatment, continuous multiple litter size less than 6, poor lactation performance and difficulty in walking with foot and limb disease should be eliminated as soon as possible.