[Retracted] Nitrogen Inversion Model in a Wetland Environment Based on the Canopy Reflectance of Emergent Plants

Table 2

Band position and performance of different models for predicting TN concentration.

TN contents	Species	Models	Selected bands (nm)	RCv^2	RMSEcv
TN in water	Reed	SR	1105/975	0.56	0.27
		ND	1105/975	0.57	0.27
		SMLR	500, 765, 960, 1125	0.75	0.22
		PLSR	—	0.83	0.20
	Cattail	SR	1705/1630	0.54	0.28
		ND	1705/1630	0.54	0.28
		SMLR	405, 520, 615, 1125, 1180	0.75	0.25
		PLSR	—	0.78	0.23
TN in plants	Reed	SR	820/825	0.62	0.33
		ND	820/825	0.62	0.33
		SMLR	580, 715, 1000, 1155, 1295	0.75	0.27
		PLSR	—	0.81	0.24
	Cattail	SR	1130/1120	0.55	0.35
		ND	1105/975	0.56	0.34
		SMLR	420, 720, 865, 900, 935	0.61	0.32
		PLSR	—	0.66	0.28

Note. The higher the R_Cv² value, the better the fitting effect between the predicted value and the measured value of each model. The lower the RMSE_cv value, the higher the accuracy of each model.