In large-scale pig farms, in order to strengthen empty-breeding, feeding and management of pregnant sows, promote sow oestrus and breeding, prevent stillbirths and abortions, increase the number of litters, increase the number of litter weights, reduce the incidence of piglets, increase weaning weight and raise The effectiveness of the pigs and the strengthening of feeding and management of the vacant and pregnant sows are as follows:
Feeding technology
1, dietary nutrition needs:
Nursing and pregnant mother-feeding dietary nutrition requirements: crude protein 14%, digestive energy 2900 calories, kilograms, lysine 08%. Vitamins A, D, and E have a great influence on the reproductive performance of the mother quail. The requirements per kilogram of feed are: vitamin A3000 international unit, vitamin D [6oL~international unit, vitamin E8 international unit
2, empty sow breeding:
Large-scale pig farms adopt the early weaning technique of 2t or 28-day-old piglets to wean their sows to their breeding sheds. They must carefully observe the estrus of the sows, do a good job of mating and recording the sows, and take effective measures to strengthen the management of feeding. Short-term excellent feeding: Sows are fed full-quality, high-quality nursing sow feeds after weaning, with a daily feed volume of 2.5-3.2 kg, three times a day, sufficient clean water, and attention to calcium, phosphorus and vitamins A, D, E sufficient supply. L2l Weaned sow rearing: In the recovery column, it is advisable to have 3-4 sows per lap. Each floor requires 1.8-2 square meters of space to intensify the movement and exposure to sunlight. Most sows are bred for 3-10 days after weaning. Estrus in 3-5 days. Therefore, it is required to check the estrus of the sow 3 days after weaning or to drive the boar to the vicinity of the sow, so that the sow is stimulated so that it will heat up as soon as possible. When gilts are in estrus, they should be bred in good time. For individual lean sows, the amount of feed must be increased. It is required that the estrus should be bred during the second estrus. The rate of conception and the number of litters should be increased. For individual obese sows, restriction feeding and increased exercise were used to reduce the sputum and, if necessary, 80-1000 units of chorionic gonadotropin or maternal serum were injected to promote estrus and breeding.
3, feeding pregnant sows
Pre-pregnancy feeding: From mating to 84 days before pregnancy, in order to improve production efficiency and farm equipment utilization rate, the sow should be transferred to the limit bar for 30 days after the pregnancy is confirmed, and immediately reduced. Each sow received 1.8-2 kg of pregnant sows on a daily basis. Provide sufficient drinking water. If there is too much feed, the sow's intake of excess energy can easily cause embryonic death or poor embryo development.
Feeding late in pregnancy: After 84 days until the end of pregnancy, it is during the rapid growth and development of the fetus that the amount of feed needs to be increased. The dietary requirements for nutrition are as follows: Crude protein is 15%, and the daily feed volume is about 2.5-3 kg. The first born sows are slightly later to prevent the fetus from being oversized and causing dystocia. Supplementing green feed can effectively prevent constipation of sows, significantly reduce stillbirths and mummy, and reduce diarrhea in piglets. Sows can be given intramuscular injections of vitamins A and E 2 weeks before delivery to enhance sow physique and reduce stress. 5 days before delivery, they should gradually reduce the amount of feed, feed 2 kg of feed on a daily basis, and do not feed on the day of delivery. Feed. Drink plenty of clean water, feed a small amount or feed the right amount of wheat water in winter and spring cold seasons. Before a sow enters the production room, pigs and sow pigs must be disinfected. Special attention must be paid to the cleanliness of the sows' breasts and nipples, and care must be taken to prevent uncleanness of the breasts and nipples and to prevent diarrhoea and other diseases after the piglets suck their milk.
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