NIRS Calibration Statistics

NIRS calibration statistics for broad-based prediction equations used to estimate neutral detergent fiber (NDF), in vitro true digestibility (IVTD), protein, and starch of corn silage.

Trait

N

Mean

R2

SEC

SEV(C)

# PLS terms

Math trt.

NDF (%)

838

47.0

0.93

1.53

1.60

13

1,4,4,1

IVTD (%)

642

80.0

0.82

1.47

1.56

11

1,4,4,1

Protein (%)

844

7.5

0.92

0.32

0.34

13

1,4,4,1

Starch (%)

293 28.4 0.94 1.83 2.02 9 1,4,4,1

SE = standard error; R = coefficient of determination; SEC = standard error of calibration; SEV(C) = standard error of cross-validation; #PLS terms = number of terms used for modified partial least squares regression.