1, empty sow rearing management Empty is the sow after weaning to estrus again. Weaning should be done 2-3 days before weaning to prevent mastitis. After weaning, groups can enter the gymnasium for 6-8 hours. According to the size of the housing, it is advisable to use 3-4 heads. Under normal circumstances, normal estrus should be performed within 5-7 days. During the period from the end of weaning to the end of breeding, it is recommended to feed 3-4 kg of special material for weaning. Sister estrus performance: 1, loss of appetite; 2, manic uneasiness; 3, the vulva red and swollen out of white mucus; 4, see boar or pressure standing back static reflection, the above symptoms, that is, heat. Breeding methods: 1. Weaned pigs with estrus 3 days apart can take the first 24 hours after static standing reflexes, 12 hours at regular intervals, and 3 times after 12 hours; 2. Weaning interval 5-7 days. The pigs appeared first 12 hours after static reflection, 12 hours apart, and 12 hours later. 3. According to the characteristics of excellent breeds, it is recommended to immediately breed the pigs after standing. Hours of compounding, the third breeding interval of 12 hours; 4, after the end of breeding, change the feeding pre-pregnancy material. 2. Feeding management of pregnant sows Feeding and Management Objectives: Ensure embryo implantation, reduce stillbirth and miscarriage, increase litter size, increase birth weight and survival rate of piglets, ensure vitality of newborn piglets, reduce occurrence of yellow and white piglets, and improve milk quality and early lactation of sows. The amount of milk produced by pigs prevents sows from autism, mastitis, and metritis, prolongs the useful life of sows, and increases fertility. There is currently a problem: sows are too fat or too thin, resulting in postpartum lactation in sows, small birth weights, poor growth, frequent diarrhoea, low piglet survival rates during lactation, low weaning weights, and low estrus rates after weaning. Affect the next fetus mating and pregnancy, raising the cost of feeding. The sow’s gestation period is 114 days and the calculation method is “three months, three weeks, three days†(303+73+3=114). A. At the beginning of pregnancy (within 4 weeks after mating) This stage requires almost no extra nutrition. At this time, the intake of sows is too large, which will increase the death of embryos. Therefore, feed intake should be limited during this period, and the pre-pregnancy feed should be 1.8. -2.2 kg. B. Mid-pregnancy (31-85 days) This stage is to limit the amount of feed based on sow's body condition and feed 1.8-2.5 kg in the pre-pregnancy period to control the sow's moisture level, and at the same time to appropriately increase the crude fiber level in the diet. , Increase satiety, prevent constipation, must prevent excessive intake of diet, resulting in sows too fat. C Late pregnancy (86-114 days) This stage is the rapid development of the fetus. The weight of 70-80% of the piglet's newborn is rapid growth at this stage. Therefore, pregnant sows should be strengthened before the four weeks before birth to promote the rapid growth of the fetus, and make a reserve for lactation. Normally at this stage, feeding of 3-5 kg ​​of feeding material (3 to 3 gilts for gilts and 4-5 kg ​​for sows and increasing or decreasing the amount of feed according to the speed of the sow's abdominal circumference) is started. After the breeding of D, the group feeding was changed to the individual feeding at the proper temperature as soon as possible, keeping the house as quiet as possible, so that the fertilized eggs were implanted more in the womb. After 18 to 23 days or 36-45 days after the E-breeding, do a good job in pregnancy diagnosis and timely detect the unborn sows. F. Keep the pens dry and hygienic. Keep the temperature in the summer heatstroke and keep warm in winter so that the temperature is kept at about 20°C. It is forbidden to let the house suffer from high temperature, humidity, icing, slipping, and prevent miscarriage. G. According to the immunization schedule, various vaccination vaccination work is carried out to find that the diseased pigs are treated in time and disinfected by the whole group. It is forbidden to use drugs that can cause sow miscarriage, such as dexamethasone and estrogen, and to prevent miscarriages caused by high fever. The H sows must pay attention to keeping the environment quiet while preserving the cleanliness of the breasts, legs, and the vulva, and keep the pens and pigs clean. Nuts are a group of cleistoses that have a hard skin and contain a single seed. It is the essence of plants, rich in nutrition, containing higher minerals, vitamins, oil and protein, eating more can promote growth and development, increase physical fitness. Common nuts include walnuts, peanuts, almonds, cashews, macadamia nuts, pistachio nuts and so on. Nuts, Almonds,Walnuts,Pistachio nuts,Macadamia nuts Xi'an Gawen Biotechnology Co., Ltd , https://www.seoagolyn.com