Scientific management of sows before mating

Feeding and management of parturient sows before mating there are generally two periods of estrus in the whole lactation period: the first estrus is 27 days after delivery, and none of them get pregnant during this period. The second estrus occurs at 23-32 days postpartum, when sows are at the peak of lactation, and the symptoms of estrus are not obvious and are not easy to be found. Later, due to the influence of lactation, it is usually necessary to go into estrus 4-12 days after weaning, that is, to enter the pre-breeding period of sows. Due to the large nutritional consumption of sows during lactation, most sows have poor fat and weak physique, so it is necessary to strengthen feeding management to restore body fat as soon as possible. In addition, it is also necessary to make sows stop lactation as soon as possible to prevent mastitis.

Feeding and management of parturient sows and reserve sows before mating short-term optimal feeding before mating can increase the number of ovulations by about 2. Specific methods: after 3-4 days after weaning, sows should be given optimal feeding immediately until the end of breeding according to the feeding and management methods of parturient sows; reserve sows should be fed richly before the weight of 70kg, and should be restricted after the weight of 71kg, so as not to affect estrus mating and reproduction. However, from 11 to 14 days before mating to the end of mating, short-term optimal feeding should be carried out with an additional 22.5 kg of mixture per day.