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Reasons and experience of young sows born at first birth
At present, the pig industry has developed rapidly throughout the country, and all of them are in the direction of intensification and factory production. The following methods can be used to increase the birth rate of newly born sows: 1. Grasp the feeding and management of breeding boars. As the saying goes: "The boar is good, the slope is good, and the sow has a good nest". It is very important to cultivate boars. Boars involved in breeding must check the quality of boar semen; improper feeding and management results in boars being too fat or too thin, making libido less or less strong, decreasing semen quality, abortion and birth rate. Influential; To reasonably feed male boars, to meet the nutritional needs of boars, we must take feeding restrictions, regular quantitative, every meal can not eat too full, require the volume of the diet can not be too large, otherwise easy to cause paralysis Increased abdominal circumference, snooze crawling stupid. If the amount of feed is too low, especially if the winter temperature is low, most of the boar's feeding nutrients will be converted into heat to protect itself from cold. This will cause the quality of the semen to decline. When the adult boar feeds are not concentrated, about 2.5 kg per day, When the breeding is concentrated, about 3 kg per day, the amount of feeding should be appropriately increased in the severe winter and winter, and the increase or decrease should be made according to individual boars of the boar. Feeding boars is not allowed by the method of free feeding, keeping 7-8 percent Circumstances; Boars must have proper exercise during the breeding period, usually about once every day in the afternoon and afternoon. Summer should be done sooner or later. In the winter, you should exercise at noon. In case of extreme heat or cold, windy and rainy, etc. The boar should be stopped; boars should be used rationally. The weight of the boar should be 120 kg or more. The age of the boar should be more than 8 months. You can participate in breeding. You can only breed once a week, and no more than 5 times in a month. Adult boar More than 12 months of age, no more than 3 times per week, no more than 15 times a month. Middle-aged boars (above 17 months of age) are used once every other day, such as continuous breeding for 3 days, they should rest for 2 days; hot and hot breeding should be carried out in the morning and at night, and cold seasons should be around 9:30 in the afternoon and 3 in the afternoon. Half or so. 2. The primiparous sows are mated at the right time; the age of the month is more than 8 months and the weight is more than 120 kilograms before breeding. The estrus status of the sow should be accurately and accurately monitored. Inflammation became bright and mentally disturbed. Crawling across other sows resulted in abnormal calls and partial feed intake. Later, the genitals changed from bright red to purple, from swelling to slightly shrunken, and the genitals flowed out of white mucus. Both ears are vertical. Mental fatigue, hand pressing back and back, using the boar performance docile performance, originally intended to accept the boar cross, has reached the ovulation and breeding time, the general starting sows from the first day of the estrus performance generally 6-8 days can be mated . Sows usually have the above symptoms 4-6 days after weaning: However, some primiparous sows have no obvious estrus and still mature follicles and ovulate. If not carefully observed, it is easy to miss the estrus timing. For the first-time pigs, the method of boar trials should be adopted. For the first time, pigs with indistinct estrus symptoms can be bred in time, and secondly, they can stimulate other non-estrus pigs. When boars are used to try sows, the sows do not want to receive boars when the boars are close, indicating that they are not in estrus. If sows are willing to accept the sows to be accepted, the sows are docile and willing to accept the boar to cross the estrus. It may be a little early to accept boars that are not very smooth or unstable. They must be allowed to receive boars, meekness, and allow cross-breeding to determine the best estrus time. As the saying goes: Less with the late, not many with the middle of the old." Disinfection work should be done during breeding, and the sow and boar foreskin should be disinfected with 100-total poison and l:3000-fold release. The breeding should be repeated and the second breeding should be carried out 8-12 hours after the first breeding. If the sows are to be bred in the morning. The second breeding in the afternoon of the same day, if the sow is mated in the afternoon, the second breeding time should be compounded in the morning and the breeding should be done in the cool weather in the summer. 3, when mating species should do a good job in mating records, strictly all breeding and management after mating, often check the situation, check the pregnancy to prevent empty, pregnant 84 days before the day to feed 2.2 kg, to maintain a moderate sensation constitution and robust. After 84 days of pregnancy, feed about 3.0-4.O kilograms a day and have upper middle and upper body sensation, and the breasts should be fully developed. Late pregnancy should be based on the previous period, increase the amount of feed to ensure that the fetus has sufficient nutrient supply in the late development, but it can not make the sows too fat, feeding time should be fixed, can not easily replace the feed to prevent scaring, prevent mechanical Injury, so as not to cause abortion and stillbirth, should pay attention to internal and external health and pig body hygiene, regular disinfection. Vaccination according to this immunization procedure (before and after mating) to ensure its health. Do summer cooling work.