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Table 1 Chemical composition and digestible energy (DE) and metabolizable energy (ME) content of corn fed to growing pigs determined directly or by prediction equations (MJ/kg, dry matter basis)

From: Use of near-infrared reflectance spectroscopy for the rapid determination of the digestible energy and metabolizable energy content of corn fed to growing pigs

  Entire set (n = 117)    Calibration set (n = 88) Validation set (n = 29)
Itemse Min Max Mean SDa CVb SELc RSELd Min Max Mean SDa CVb Min Max Mean SDa CVb
Moisture, % 10.90 14.00 12.63 0.892 7.06 0.129 1.02 10.90 14.00 12.61 0.930 7.37 10.94 13.96 12.69 0.881 6.94
CP, % 7.80 11.00 9.41 0.718 7.63 0.057 0.62 7.80 11.00 9.42 0.709 7.53 7.85 10.95 9.39 0.732 7.80
EE, % 2.09 4.97 3.87 0.580 14.99 0.025 0.64 2.09 4.97 3.88 0.592 15.25 2.13 4.91 3.85 0.572 14.86
Ash, % 0.83 1.82 1.41 0.257 18.21 0.015 1.06 0.83 1.82 1.40 0.258 18.45 0.85 1.78 1.43 0.253 17.67
ADF, % 1.73 3.69 2.33 0.443 19.02 0.053 2.29 1.73 3.69 2.31 0.459 19.89 1.81 3.59 2.38 0.444 18.64
NDF, % 6.40 19.37 12.02 3.083 25.65 0.228 1.91 6.40 19.37 11.98 3.165 26.42 7.23 19.19 12.11 3.039 25.10
DED f 14.99 17.50 16.37 0.751 4.59 - - 14.99 17.50 16.39 0.757 4.62 15.02 17.48 16.31 0.741 4.54
MED f 14.42 17.05 15.96 0.734 4.60 - - 14.42 17.05 15.97 0.740 4.64 14.49 17.02 15.93 0.730 4.58
DEC g 14.74 17.72 16.42 0.718 4.37 - - 14.74 17.72 16.43 0.725 4.41 14.81 17.69 16.38 0.708 4.32
MEC g 14.43 17.42 16.16 0.697 4.31 - - 14.43 17.42 16.18 0.709 4.38 14.61 17.35 16.10 0.676 4.20
  1. aStandard deviation
  2. bCoefficient of variation
  3. cStandard error of laboratory
  4. dRelative standard error of laboratory
  5. e CP crude protein, EE ether extract, ADF acid detergent fiber, NDF neutral detergent fiber
  6. fDED and MED values determined by digestion-metabolism experiments using growing pigs
  7. gDEC and MEC values calculated according to the equations of Noblet and Perez [6]