First, nutrition goals:
11-12 live piglets, piglet weight not less than 1.35 kg, sows maintain a good body condition, weight gain during pregnancy 25 kg, body condition score at delivery not less than 3.5 points.
Second, nutrition levels:
Digestive energy 3.1 megacalories/kg, crude protein 13.5-14.0%
Lysine 0.55-0.60%, crude fiber 6-8%
Third, proposal 1:
Three-stage feeding level
Early in pregnancy (28 days of breeding), 2 kg of feed per day. After the start of sow mating, the rations are fed for 21-28 days in the rearing stage and no more than 2 kg per day to ensure the maximum survival rate of embryos.
In the second trimester (28-84 days), 2.3-2.5 kg per day. Increase or decrease feed according to body condition. With a score of 3 on the body condition score, the feed decreased by 7.5% for each additional 1 point.
During the second trimester of pregnancy (84 days - delivery), 0.5-1 kg of feed per day is added depending on the sow body condition score. Reduced to 2.0-2.5 kg before delivery. Prenatal supplementation for 4 days, free intake.
Recommendation 2:
Four-stage feeding level
Feeding amount during pregnancy
Weaning to breeding free intake
Breeding to 21 days 1.8-2.0
21-75 days 1.8-3.6 (Adjusted according to body condition)
75-90 days 1.8-2.3
90 days to delivery 2.0-2.7
Fourth, pregnant sows when feeding matters needing attention
One of the notes - must control the amount of food intake
Restricted feeding for pregnant sows is a common feeding method in the pig industry, and generally accounts for 50%-60% of their free intake during pregnancy.
Eating too much during pregnancy will reduce feed intake during lactation and growth of suckling piglets;
Overfeeding limits the intake of protein, so that the maternal supply of fetal nutrition is insufficient;
The negative effects of being too thin:
Delayed first estrous cycle, high return rate, increased abortion in cold weather, shorter life span, and fewer litter size
The adverse effects of excessive fat:
Overweight sows at the time of delivery, difficulty in movement, difficulty in childbirth, easy crushed piglets, reduced feed intake during lactation, reduced milk production, increased body weight loss, and increased sensitivity to heat stress
Note two - Protein levels should not be too low
Sows dietary protein levels must not be low, otherwise the number of sows born will be affected. The dietary protein level of the first sow was higher (14%) and could be lower (12-13%) after the second trimester;
Metabolic procedural studies have shown that pregnant sows with low protein diets can result in fattening of the carcass when the offspring are released.
Note 3 - Appropriate increase in dietary crude fiber levels
Increasing dietary fiber levels can increase the volume of the digestive tract, which is beneficial to the growth of the fetus;
Feeding the fiber, the sow gets some energy through the hindgut fermentation; prevents the pregnant sow from becoming over-fat and increases the lactation feed intake; increases satiety and reduces stress;
Feeding green feed can increase the crude fiber level of the diet and also improve the performance of the sow.
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