Table 7 Effects of magnesium on serum urea nitrogen, calcium and magnesium concentrations as well as reproductive hormone activities in sows (Exp. 2)
From: Effects of magnesium on the performance of sows and their piglets
Item | Supplemental magnesium, % | SEM1 | P value | ||||
|---|---|---|---|---|---|---|---|
0 | 0.015 | 0.03 | 0.045 | Linear | Quadratic | ||
Farrowing | |||||||
Urea nitrogen, pmol/L | 8,970.2 | 8,695.2 | 8,001.4 | 7,890.1 | 102.2 | 0.91 | 0.43 |
Estrogen, pmol/L | 83.4 | 90.5 | 85.5 | 78.8 | 5.42 | 0.44 | 0.33 |
Progesterone, pmol/L | 9,235.8 | 8,000.2 | 8,247.7 | 8,365.6 | 107.5 | 0.17 | 0.08 |
Prolactin, ng/L | 138.5 | 152.5 | 185.5 | 195.7 | 7.54 | <0.01 | <0.01 |
Alkaline phosphate, U/L | 8.69 | 9.06 | 8.92 | 10.58 | 0.44 | 0.01 | 0.01 |
Magnesium, mg/100 mL | 1.76 | 1.93 | 1.99 | 1.95 | 0.06 | 0.02 | 0.02 |
Calcium, mg/100 mL | 8.63 | 9.07 | 9.99 | 9.02 | 0.38 | 0.52 | 0.70 |
Weaning (d 28) | |||||||
Urea nitrogen, pmol/L | 9,423.0 | 8,834.4 | 7,557.9 | 8,227.9 | 38.4 | 0.01 | 0.01 |
Estrogen, pmol/L | 27.2 | 26.3 | 27.3 | 25.2 | 1.38 | 0.39 | 0.63 |
Progesterone, pmol/L | 206.3 | 227.2 | 199.9 | 228.0 | 14.4 | 0.56 | 0.82 |
Prolactin, ng/L | 139.3 | 141.2 | 184.6 | 196.8 | 6.1 | <0.01 | <0.01 |
Alkaline phosphate, U/L | 10.7 | 14.2 | 14.8 | 14.9 | 0.65 | <0.01 | <0.01 |
Magnesium, mg/100 mL | 1.73 | 1.94 | 1.97 | 1.86 | 0.09 | 0.27 | 0.10 |
Calcium, mg/100 mL | 8.48 | 8.62 | 7.51 | 8.58 | 0.42 | 0.67 | 0.52 |