[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)
RCv2
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 RCv2 value, the better the fitting effect between the predicted value and the measured value of each model. The lower the RMSEcv value, the higher the accuracy of each model.