Camp breeding of pregnant sows

1. In the early stage of pregnancy (within 4 weeks after mating), the embryo needs almost no extra nutrition, and if the feed intake of the sow is large, the death of the embryo will be increased, so the intake should be limited at this stage, with a daily feed of 1.5-2.0 kg. Weaning sows in particularly poor condition can be fed more feed. Dietary nutrition level: digestible energy 2900-3000 kcal / kg, crude protein 14% 15%

2. In the second trimester of pregnancy (4 weeks after mating to 4 weeks before parturition), the amount of feed is limited according to the body condition of sows, 1.8-2.2 kg per day, in order to maintain the fat condition of sows at 3.5-4.0 points. At the same time, the level of crude fiber should be properly increased to increase the sense of satiety and prevent constipation. It is necessary to strictly prevent excessive dietary intake, leading to sow obesity. Dietary nutrition level: digestible energy 2900-3000 kcal / kg, crude protein 14% 15%

3. In the later stage of pregnancy (from 4 weeks before birth to giving birth), 60% of the birth weight of piglets grows rapidly at this stage, so pregnant sows with 4 weeks of prenatal birth should strengthen nutrition, promote rapid fetal growth, and make some reserves for milk production. Generally, lactating sows can be fed at this stage, with a daily feed of 2.5-3.0 kg, but it should be reduced gradually 5-7 days before delivery, especially for obese sows 7 days before birth, until they stop feeding on the day of litter. Dietary nutritional levels are as follows: digestible energy 3100-3200 kcal / kg, crude protein 16% Mel 17%, lysine above 0.8%.

High-quality green and silage are especially suitable for feeding pregnant sows, which can not only maintain strong appetite, promote digestion and absorption and fecal excretion, but also increase litter size and reduce feed production cost. therefore, pig farms with conditions can be fed with green feed every day.