Feeding and management techniques of empty sows

Empty sow refers to the sow after giving birth to piglets, and then enter the lactation period, the sow after weaning is the beginning of the empty period, until the next breeding period is the empty period of sows, the feeding and management techniques of empty sows are as follows.

Key points of management

Urge sows to estrus and participate in mating as soon as possible to make them conceive.

Short-term preferential feeding to promote estrus and ovulation

The main results are as follows: 1. For lactating sows under normal feeding and management conditions, the sows should be 7-8 fat when they are weaned, and will be able to rebreed 7-10 days after weaning to start the next breeding cycle. Some people pay little attention to empty sows and mistakenly think that empty sows are neither pregnant nor with offspring, so they can be fed casually. In fact, many experiments have proved that short-term optimal feeding of empty sows before mating has a good effect on promoting estrus ovulation and easy conception.

2. A few days before weaning, sows can secrete quite a lot of milk (especially early weaned sows). In order to prevent sows from mastitis after weaning, the amount of formula feed should be reduced 3 days before and after weaning, and some green roughage should be given to satisfy hunger and urge sows to dry milk as soon as possible. After the weaning sows are dried, due to the burden, reducing appetite, providing more nutritious feed and ensuring full rest, the sows can quickly recover their physical strength. At this time, the nutritional level and supply of the diet should be the same as that in the later stage of pregnancy. if it can be fed with animal feed and high-quality green feed, it can promote estrus ovulation in empty sows and lay a material foundation for increasing the conception rate and litter size.

3. Sows with more litters during lactation, or sows with longer lactation, should be strengthened as soon as possible to restore their physical strength and maintain their body at 780%. This is the basic condition to ensure that sows are in estrus in time after weaning.

4. empty sows also need environmental conditions such as dryness, cleanliness, suitable temperature and humidity, fresh air and so on. If empty sows do not get good feeding and management conditions, it will affect estrus, ovulation and conception.

Methods of controlling normal estrus in sows

The main results are as follows: 1. The boar induction method often uses the test boar to chase the non-estrous sows. Through the external hormone odor and contact stimulation secreted by the boar, it can cause the pituitary gland to secrete follicle-stimulating hormone through nerve reflex, and promote the sow to ovulate. This method is simple, easy and effective. Another simple and effective method is to play the sound recording of boar courtship and make use of conditioned reflex to test the situation continuously. The effect of this biological simulation is also very good.

2. Herd and circle, combine the non-estrus sows into the enclosure of estrus sows, and promote estrus ovulation by crawling and other behavioral stimulation.

3, massage the breast, the method is to feed every morning, with the palm of the surface massage, each breast for about 10 minutes, after a few days after the sow has estrus symptoms, and then every day surface and deep breast massage for 5 minutes. Deep massage for about 10 minutes on the day of mating.

4. Strengthening exercise and driving out non-estrous sows can promote metabolism and improve fat condition. Driving exercise can be exposed to sunlight, breathe fresh air and promote oestrus and ovulation in sows. The effect will be better if it can be combined with grazing.

5. Litter side by side. After eating colostrum, all the piglets born to the sows with less litter and poor milk are fed to other sows who give birth in the same period. In this way, the sows can return milk ahead of time, estrus and breed earlier, increase the number of litters per year, and increase the number of litters per year.