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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
  1. 1SEM = Standard error of mean.