How to raise first-time mother pigs? Master these breeding secrets
1. Nutritional regulation during the growing period. For young sows (two-way crossbreeds), starting from 30 kg body weight, each kg of compound feed in the diet should contain 13 megajoules, 16% crude protein, 0.8% lysine, 0.75% calcium, and 0.65% phosphorus; do not restrict feed intake, and let them eat as much as possible. Starting from 45 kg body weight, increase the calcium and phosphorus content by 0.1% each. At 150 days of age, when the young sow weighs about 80 kg, control feed intake to 2.3 kg to 2.5 kg per day. For native-breed young sows, the calculated body weight should be 2 kg to 3 kg less.
2. Flushing and supplemental feeding during the mating period. Two-way crossbred young sows should be bred for the first time at 8 months of age and 110 kg body weight, while native-breed pigs should be bred at 70 kg body weight. Because young sows begin restricted feeding from 5 months of age, start 14 days before mating by increasing the daily ration by 40% to 50%, reaching 3.8 kg to 4 kg per day.
3. Moderate nutrition during pregnancy. Immediately after mating ends, the feeding amount should be reduced to the level before flushing. The diet formula should contain, per kg of feed, 12.1 megajoules of digestible energy, 13% crude protein, 0.60% lysine, 0.75% calcium, and 0.65% phosphorus, with about 2.2 kg fed daily until 84 days of pregnancy; starting from 85 days of pregnancy, adjust the diet nutrition to contain, per kg of feed, 1251.3 joules of digestible energy, 14% crude protein, 0.75% lysine, 0.8% calcium, and 0.65% phosphorus, with 3.25 kg to 3.5 kg fed daily. Until 3 days before farrowing, reduce the daily feeding amount to about 1.8 kg to facilitate an easy birth.
4. Increase feed intake during lactation. From 5 to 7 days after the sow gives birth, gradually increase to the maximum feeding amount. The method for estimating the daily ration of a sow during lactation is: use 1.5 kg of diet as the base, and add 0.5 kg of feed for each piglet nursed; for example, nursing 10 piglets means 6.5 kg of feed. If the sow cannot finish 6.5 kg of feed each day, add 2% to 4% edible oil to the feed, bringing the nutritional level to 13 megajoules to 13.8 megajoules of digestible energy, 14% to 16% crude protein, 0.7% to 0.75% lysine, 0.84% calcium, and 0.7 phosphorus per kg of feed.