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Table 4 Apparent nutrient digestibility (%)2of gestation or lactation diets for gilts containing various dietary levels of magnesium (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
Early gestation (d 45– 48)
Dry matter 85.5 86.6 86.5 86.2 0.23 0.49 0.67
Gross energy 83.1 82.6 81.8 81.4 0.20 0.70 0.75
Crude protein 86.4 86.8 88.3 84.9 0.14 0.12 0.54
Ether extract 86.3 80.1 87.7 85.0 0.21 0.81 0.77
Crude fiber 57.3 58.8 58.2 55.5 0.13 0.41 0.47
Late gestation (d 95– 98)
Dry matter 79.3 82.9 81.2 78.3 1.49 0.49 0.08
Gross energy 76.8 77.4 83.4 81.5 1.67 0.03 0.07
Crude protein 77.7 84.5 80.5 79.3 1.47 0.90 0.04
Ether extract 82.9 84.7 82.6 82.5 1.35 0.57 0.68
Crude fiber 48.9 58.3 56.4 52.0 1.08 0.44 0.01
Lactation (d 18– 21)
Dry matter 85.3 84.3 84.7 84.2 0.88 0.44 0.71
Gross energy 82.2 84.3 83.2 83.7 1.03 0.48 0.56
Crude protein 84.0 84.5 85.5 82.9 0.85 0.59 0.21
Ether extract 85.9 85.7 86.1 86.1 1.16 0.86 0.97
Crude fiber 48.2 53.6 58.7 50.7 0.92 0.18 0.01
  1. 1SEM = Standard error of mean.
  2. 2Digestibility was determined using chromium oxide as marker.