Literature 1: Effects of dietary arginine supplementation on reproductive performance and immunity of sows 2013
(The effect of dietary arginine on reproductive performance and immune function of sows)
Protocol: 30-day pregnant sow, 3 treatments were corn-soybean control diet to delivery, control + 1% arginine hydrochloride to 90 days of pregnancy, control + 1% arginine hydrochloride to 114 days of pregnancy, The same diet was fed at other times and sow blood samples were collected on days 30, 90 and 110 of pregnancy.
Results:
1. Adding arginine has no effect on the litter size of sow litter.
2. The number of live litters in the sows of the control group was significantly higher than that of the control group, and the total litter weight and live litter weight were significantly higher than the other two groups.
3. Adding arginine significantly increased the levels of blood ornithine, proline and arginine in the 90th day of sow pregnancy. The control of +1% arginine hydrochloride to the 114th day of pregnancy significantly improved the sow's pregnancy. 110 days of blood ornithine, proline, arginine levels.
4. Addition of arginine significantly increased the level of immunoglobulin and PRRSV antibody in the blood of sows.
Conclusion:
The addition of arginine can improve the immunity of pregnant sows and the number of litters and live piglets, and the effect is more significant in late pregnancy.
Literature 2: Dietary L-arginine supplementation enhances placental growth and reproductive performance in sows 2012
(The addition of arginine during pregnancy improves embryo growth and sow production performance)
Protocol: pregnant sows, the test period is from the 22nd day to the 114th day of pregnancy, the two treatments are 1% refined acid, 1.7% alanine, blood samples collected on the 22nd, 40th, 70th, 90th day of pregnancy. .
Results:
1. Addition of arginine significantly increased blood estrogen, arginine, proline and ornithine levels in sows at 40, 70 and 90 weeks of pregnancy.
2. Each treatment had no effect on the blood urea and progesterone levels of the sow.
3, the addition of arginine significantly increased litter size, litter size, litter weight, placental weight.
4. Each treatment had no effect on the estrus interval after weaning.
Conclusion:
Adding arginine in the middle and late pregnancy is beneficial to sow embryo development and improving reproductive performance
Literature 3: Influence of dietary L-arginine supplementation to sows during late gestation on sow and litter performance during lactation 2012
(The effect of adding arginine on the performance of sows and piglets in late pregnancy)
Protocol: Pregnant sows, the test period is from the 93rd day of pregnancy to delivery, 2 kinds of diets are treated as control (6.0 lbs/d), control +25g/d arginine, and the same diet is fed during lactation.
Results:
1. The addition of arginine increased the body weight gain of the sow during the late pregnancy, and the effect of the sow was better than that of the gilts.
2. The addition of arginine had no effect on the weight loss of the sow during lactation, the number of litters, the number of weaned pigs, the weight of birth, the weight of weaning, and the weight of placenta.
3. The addition of arginine had no effect on the blood levels of IGF-1, insulin and urea nitrogen in the sows on the 93rd and 110th day of pregnancy.
Conclusion:
Adding arginine in the late pregnancy can increase the weight of the sow, but has no effect on the fetal and placental weight, and has no effect on the growth of the piglets during lactation.
Literature 4: Effects of dietary arginine supplementation during gestation and lactation on the performance of lactating primiparous sows and nursing 2008
(Effects of arginine in pregnancy and lactation on reproductive performance of gilts)
Protocol: gilts, 1% arginine hydrochloride and 1.7% alanine from the 30th day of delivery to the delivery stage. Each treatment in the lactation stage is divided into two groups, 1% arginine. Hydrochloric acid, 1.7% alanine. After delivery, the number of litters per sow was adjusted to 10 heads.
Results:
1. Each treatment had no effect on sow weight, backfat thickness, feed intake, and return interval.
2. The addition of arginine during lactation significantly increased the blood insulin, arginine and most amino acid levels on the 7th day of sow breastfeeding.
3. Adding arginine during lactation significantly increased the weight gain of piglets from 0-7 days and 0-21 days.
Conclusion:
The addition of arginine during pregnancy has no effect on the reproductive performance of gilts, but the addition during lactation can improve their reproductive performance.
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