Prediction Model of the Key Components for Lodging Resistance in Rapeseed Stalk Using Near-Infrared Reflectance Spectroscopy (NIRS)

Table 5

The test result of the model.

Index	Pretreatment method	Wave number (cm^−1)	Principal component number	Calibration set		Validation set
				R	RMSECV (%)	R	RMSEP (%)
Carbon	No spectral pretreatment	7501.7–4246.5	9	0.973	0.240	0.887	0.348
Nitrogen	No spectral pretreatment	7501.7–5449.8	9	0.959	0.024	0.875	0.033
		4601.3–4246.5
Lignin	No spectral pretreatment	7501.7–6097.8	3	0.923	1.250	0.760	1.691
		5453.7–4246.5
Acid-insoluble lignin	No spectral pretreatment	11998.9–7497.9	1	0.928	1.480	0.766	2.448
		5453.7–4246.5
Soluble sugar	No spectral pretreatment	11998.9–6097.8	1	0.939	0.310	0.833	0.428
Cellulose	No spectral pretreatment	7501.7–5449.8	6	0.945	1.880	0.863	2.600