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Nutritional Requirements and Feeding Points for Pregnant Sows

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1. Early pregnancy (within 4 weeks after mating): the embryos require almost no extra nutrition. At this time, if the sow has a large feed intake, it will increase embryo mortality, so feed intake should be restricted at this stage, with a general daily feeding amount of 1.5-2.0 kg. For weaned sows in particularly poor body condition, a little more feed can be given. The dietary nutrient levels are: digestible energy 2900-3000 kcal/kg, crude protein 14%-15%; 2. Mid-pregnancy (from 4 weeks after mating to 4 weeks before farrowing): at this stage, restrict the feeding amount according to the sow's body condition, with a daily feeding amount of 1.8

1. Early pregnancy (within 4 weeks after mating): the embryos require almost no extra nutrition. At this time, if the sow has a large feed intake, it will increase embryo mortality, so feed intake should be restricted at this stage, with a general daily feeding amount of 1.5-2.0 kg. For weaned sows in particularly poor body condition, a little more feed can be given. The dietary nutrient levels are: digestible energy 2900-3000 kcal/kg, crude protein 14%-15%;

2. Mid-pregnancy (from 4 weeks after mating to 4 weeks before farrowing): at this stage, restrict the feeding amount according to the sow's body condition, with a daily feeding amount of 1.8-2.2 kg, so as to keep the sow's body condition score at 3.5-4.0. At the same time, the crude fiber level of the diet should be appropriately increased to enhance satiety and prevent constipation. It is necessary to strictly prevent excessive dietary intake, which would cause the sow to become obese. The dietary nutrient levels are: digestible energy 2900-3000 kcal/kg, crude protein 14%-15%;

3. Late pregnancy (from 4 weeks before farrowing to farrowing): 60%-70% of the piglets' birth weight is gained rapidly during this stage, so pregnant sows 4 weeks before farrowing should be given enhanced nutrition to promote rapid fetal growth and to build up some reserves for milk production. Generally, at this stage, lactation sow feed can begin to be fed, with a daily feeding amount of 2.5-3.0 kg, but the amount should be gradually reduced 5-7 days before farrowing. In particular, obese sows should have their feed reduced 7 days before farrowing, until feeding is stopped on the day of farrowing. The dietary nutrient levels are: digestible energy 3100-3200 kcal/kg, crude protein 16%-17%; lysine above 0.8%;

High-quality green forage and silage are especially suitable for feeding pregnant sows. They not only help maintain a vigorous appetite, promote digestion, absorption and fecal excretion, but also help increase the number of piglets born and reduce feed production costs, so pig farms with the conditions can appropriately add green forage each day.

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