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Table 1 Statistics for calibration and external validation parameters of the equations generated for cell wall feature prediction in sugarcane stalks

From: Precise high-throughput online near-infrared spectroscopy assay to determine key cell wall features associated with sugarcane bagasse digestibility

 

Calibration

External validation

Rank

N

SCM

Spectrum range (cm−1)

Mean

SD

R2

RMSEC

RPD

N

R2ev

RMSEP

RPD

Cellulose Crl

24

403

SNV

11,964.8 – 11,178; 8825.1 – 7243.7; 6464.5 – 4104

42.68

3.75

0.81

0.68

2.31

97

0.81

1.67

2.36

Lignin content (% dry mass)

 ASL

8

254

SSL

11,964.8 – 10,391.1; 8825.1 – 7243.7

1.74

0.23

0.84

0.09

2.48

122

0.8

0.1

2.25

 AIL

12

257

SNV

9612 – 7251.4; 6464.5 – 5677.7

14.75

1.55

0.87

0.58

2.74

128

0.8

0.74

2.24

 Total

8

214

FD + SSL

9411.4 – 5446.3

16.45

1.54

0.91

0.52

3.32

101

0.8

0.73

2.25

Lignin content (% dry mass)

 ASL

18

222

FD + SNV

11,185.7 – 10,391.1; 9612 – 7243.7; 6464.5 – 5670; 4890.8 – 4104

3.67

2.26

0.82

0.25

2.33

111

0.81

0.24

2.33

 AIL

7

144

SNV

9411.4 – 8886.8; 7868.5 – 7344; 5801.1 – 5276.6; 4767.4 – 4242.8

30.95

0.55

0.78

1.1

2.11

73

0.75

1.16

2

 Total

6

147

FD + SNV

5785.7 – 5446.3

35.12

3

0.82

1.32

2.33

74

0.81

1.33

2.31

  1. ASL acid-soluble lignin; AIL acid-insoluble lignin; N sample number; SCM scatter correction methods; SD standard deviation of reference value; R2 determination coefficient; RMSEC root mean square error of calibration; RMSEP root mean square error of external validation; R2ev determination coefficient of external validation; RPD ratio performance deviation; SNV standard normal variate; SSL straight-line subtraction; FD + SSL a combinations of first derivative and straight-line subtraction; FD + SNV a combination of FD and SNV
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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