High yield of reserve sows by regulating nutrition

(agricultural Wealth net) the nutrition regulation of reserve sows can produce high yield-nutrition regulation at the stage of 30-85 kg. When the body weight of reserve sows is 30 kg, each kilogram of compound feed should contain 13 megajoules of digestible energy, 16% crude protein, 0.8% lysine, 0.75% calcium and 0.65% phosphorus, free feeding and uncontrolled feeding to promote the growth of reserve sows as soon as possible. Starting from the body weight of 45 kg, the dietary calcium and phosphorus levels increased by 0.1%. The reserve sows began to be restricted when they were 5 months old and weighed about 85 kilograms. They were also fed the above-mentioned diet, and the daily feed intake was controlled at 2.3-2.8 kilograms according to their physical condition. -- Nutrition regulation from 110kg to delivery. It is suitable for the first mating of reserve sows at the age of 8 months and weight of 110 kg. Do not mate in the first estrus, when the ovarian function of sows is not perfect. Supplementary feeding and aphrodisiac began two weeks before mating, and the feeding amount was increased by 40-50% to 3.8-4 kg compound feed per day. Supplementary feeding and oestrus can increase the amount of ovulation, and the number of litters per litter can be increased by 2. Immediately after mating, the feeding amount was reduced to the level before supplementary feeding, about 2.2 kg per day, and the diet contained 12.1 megajoules of digestible energy, 13% crude protein, 0.6% lysine, 0.75% calcium and 0.65% phosphorus. Starting from 84 days of pregnancy, the dietary nutrition level can be increased to 12.5-13 megajoules per kilogram of digestible energy, 14% crude protein, 0.75% lysine, 0.8% calcium, 0.65% phosphorus, and 3.25-3.5 kg daily feed. 2-3 days before delivery, the daily feed volume is reduced to about 1.8 kg so as not to cause dystocia. -- third, nutritional regulation during postpartum and lactation. The feeding amount of sows should gradually increase to the maximum 5-7 days after giving birth. First, on the basis of 1.5 kg diet, each piglet was fed 0.5 kg more feed, and if 10 piglets were fed, the daily feed amount was 6.5 kg. If the feed intake of sows is on the low side, you can consider adding 2-4% oil in the feed and increasing the protein content of the diet accordingly to ensure adequate lactation of the sows. During this period, each kilogram of diet should contain 13-13.8 megajoules of digestive energy, 14-16% crude protein, 0.7-0.75% lysine, 0.84% calcium and 0.7% phosphorus.