Feeding and management techniques of weaned sows

Under normal circumstances, 3 to 10 days after weaning, sows can be in estrus, some are not weaned, and some are not in estrus for a long time or are not conceived. The causes must be found out: disease, nutrition, management, etc., and resume breeding as soon as possible.

1. Advocate early weaning.

2. The first sow should be weaned no later than 28 days.

3. 2-3 days before weaning, sows should reduce feeding as appropriate to promote milk return, and vitamin B6 should be added to reduce the incidence of mastitis.

4. Feeding and management according to breed, parity, body weight and weightlessness, especially for the first two babies.

5. It is not suitable to change the feed on the weaning day, and it is most appropriate to change the feed on the day of breeding, so be careful not to waste the feed.

6. Conceive quickly. It is ideal to add seeds within 7 days after weaning. Daily supplementation of 200 mg of vitamin E and 400 g of carotene until 21 days after mating can promote ovulation and increase litter size. Empty sows are 80% fat, easy to conceive and have a high litter rate. The weightlessness of sows after 3 births basically did not affect oestrus.

7. When the breed, parity and body weight are similar at the same time, it is appropriate to raise them in a group of 4-6 heads.

8. Speed up estrus. Induced by boar stimulation (touch, taste, hearing and visual stimulation are very important to optimize reproductive performance, but it is unwise to raise adjacent boars), Chinese and Western veterinary drugs (stir-fried leeks with brown sugar), sex hormones, breast massage (massage 10min on both sides of the breast after daily morning feeding, change to 5min after estrus, press 10min in the morning of mating day to promote ovulation). Suggestion: if the sow is not in estrus 10-15 days after weaning, you can use hormone and inject it again every half a month if necessary.

9. Those who have not been in estrus for a long time and have not been conceived for a long time should be raised and managed centrally, otherwise they will be resolutely eliminated.

10. Pay attention to deworming, once per fetus.

11. do a good job of immunization, detect antibodies regularly and regularly, and record them. 12 update and elimination.

Early weaning can not only prevent the vertical transmission of many diseases, but also increase the annual birth number of sows, but early weaned piglets need careful care. It is the key to increase the number of births per year when sows are in estrus as soon as possible. It can be advocated that under the premise of satisfying nutrition and health, the use of hormones can shorten the time from weaning to estrus and increase the conception rate. According to the drama study, sows exposed to exogenous estrogens or other analogues 11 to 14 days after estrus can cause false pregnancy without breeding, resulting in a significant decrease in the number of implanted embryos, resulting in a low litter size.

After weaning, sows should be raised in the same column according to the same parity, size and fat condition, so as to reduce the vertical transmission of the epidemic disease and avoid premature elimination caused by injury or malnutrition. The effect of this method on the first three babies is especially obvious. In addition, check the breast 2 or 3 times a day to squeeze out the residual milk. if it is found that the breast hardens and does not produce milk, one is to massage the breast with a warm wet cloth and milking side by side; the other is to put the original litter piglets back to the sow to eat milk to soften the breasts and effectively prevent the occurrence of mastitis.