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Table 6 Effects of magnesium on serum urea nitrogen, calcium, and magnesium concentrations as well as reproductive hormone activities in gilts (Exp. 1)

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 8,693.8 8,257.9 8,001.4 8,087.1 255.7 0.07 0.12
Estrogen, pmol/L 68.3 69.0 70.0 73.9 2.94 0.18 0.35
Progesterone, pmol/L 4,598.4 4,340.6 4,566.0 4,273.9 140.6 0.24 0.50
Prolactin, ng/L 133.8 161.4 149.9 138.7 8.82 0.94 0.10
Alkaline phosphate, U/L 8.72 9.97 9.36 9.45 0.37 0.11 0.29
Magnesium, mg/100 mL 1.83 2.00 1.85 1.89 0.05 0.89 0.10
Calcium, mg/100 mL 8.22 8.78 8.61 8.59 0.21 0.33 0.25
Weaning (d 28)
Urea nitrogen, pmol/L 8,728.6 8,524.1 8,308.1 8,591.6 214.6 0.79 0.84
Estrogen, pmol/L 12.94 13.72 13.13 13.99 0.75 0.44 0.74
Progesterone, pmol/L 243.1 221.4 239.1 255.1 4.14 0.34 0.31
Prolactin, ng/L 122.9 135.5 130.3 127.8 7.64 0.78 0.59
Alkaline phosphate, U/L 13.62 13.80 14.26 14.79 0.63 0.16 0.36
Magnesium, mg/100 mL 1.36 1.44 1.34 1.42 0.09 0.94 0.99
Calcium, mg/100 mL 5.66 5.00 5.15 5.71 0.28 0.82 0.11
  1. 1SEM = Standard error of means.