| 杨润,肖昊,梁兴伟,等.妊娠后期补饲硫酸镁钾盐对母猪生产性能、抗氧化能力及免疫功能的影响[J].广东农业科学,2024,(4-6):- |
| Effects of Supplemental Potassium Magnesium Sulfate during late Pregnancy on Performance, Antioxidant Capacity and Immune Function in Sows |
| 投稿时间：2024-01-13 修订日期：2024-04-01 |
| DOI： |
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| Abstract: |
| 【Objective】The purpose of this experiment was to study the effects of potassium magnesium sulfate (PMS) on sow performance, serum biochemical indexes, antioxidant activity and immune performance in the third trimester of pregnancy, and to systematically evaluate the effects of natural mineral salt PMS rich in potassium and magnesium on sow performance.【Method】Sixty sows with 3-4 parity, good health and similar expected date of delivery in the third trimester of pregnancy (85th day of pregnancy) were randomly divided into 4 groups (control group), groups 1, 2 and 3 with 15 sows in each group and 1 replicate in each head. During pregnancy, the basal diet was designed to meet the reproductive nutrition needs of sows, and the experimental groups were supplemented with PMS at 0, 5, 10 and 15 g/head/day respectively. The experiment started from the 85th day of pregnancy. After the sow gave birth it stopped feeding potassium magnesium sulfate. During lactation, all groups were fed the same commercial lactation feed, and the experimental period ended when the piglets were 18 days old.【Result】1) Supplemental PMS had no significant effects on litter size, healthy litter size, backfat thickness, labor process, body weight, feed intake in sows during lactation, and newborn weight of piglets, number of weaned piglets and number of deaths of suckling piglets (P > 0.05). The fecal score of sows during pregnancy was significantly increased by PMS supplementation (PAnova < 0.05) and showed a linear increase trend (Plinear < 0.05). Compared with the control group, 10g PMS had significant effects on newborn litter weight, weaned litter weight, average litter gain of lactating piglets and standard deviation of daily gain of lactating piglets (PAnova < 0.05), and showed a linear increase (Plinear < 0.05) and quadratic (PQuadratic < 0.05), the 10 gPMS group Compared with the control group, the birth litter weight, weaning litter weight, lactation litter average gain and lactation daily gain of piglets were increased by 16.27%, 24.42%, 35.14% and 31.64%. 2) Supplementation with PMS significantly increased the contents of triglyceride (TG), cholesterol (CHO) and low-density lipoprotein (LDL) in plasma of pregnant sows (PAnova < 0.05) and showed a linear increase trend (Plinear < 0.05), in which TG and LDL had a quadratic effect (PQuadratic < 0.05), the 10 gPMS group increased by 20.00%, 28.35%, 25.00% and 31.98% compared with the control group. 3) Supplementation with PMS linearly increased (Plinear < 0.05) the plasma contents of immunoglobulin G (IgG), immunoglobulin A (IgA), immunoglobulin M (IgM) and glutathione peroxidase (GSH-Px) in sows, and significantly increased in 10g PMS group compared with the control group (PAnova < 0.05), the 10 gPMS group increased by 17.10%, 20.34%, 8.00% and 15.04% compared with the control group. 4) PMS supplementation significantly increased the fat content in colostrum (PAnova < 0.05) and linearly increased it (Plinear < 0.05). and non-fat milk solids, lactose and protein had an increasing trend (0.05 < PAnova < 0.1) and were linearly increased (Plinear < 0.05), the 10 gPMS group increased by 51.42% compared with the control group. 【Conclusion】 PMS supplementation in late gestation can significantly improve the fecal scores of sows, relieved constipation, and improved sow performance and body health, with 10 g of PMS as the optimal dose. |
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