Table 2.

PLSR modeling results of different pretreatment methods

	Model	Pretreatment	Calibration		Validation		Prediction
			RMSEC	R2C	RMSECV	R2CV	RMSEP	R2P
Car	1	Origin	0.082	0.843	0.107	0.732	0.140	0.614
	2	MSC	0.080	0.847	0.106	0.738	0.134	0.650
	3	SNV	0.080	0.848	0.105	0.744	0.135	0.642
	4	RCF	0.122	0.653	0.142	0.532	0.131	0.662
	5	WT	0.086	0.826	0.106	0.737	0.108	0.713
	6	airPLS	0.123	0.646	0.140	0.549	0.199	0.227
Chl-a	7	Origin	0.463	0.870	0.577	0.798	0.900	0.597
	8	MSC	0.557	0.812	0.692	0.712	0.867	0.626
	9	SNV	0.834	0.650	0.898	0.600	0.886	0.609
	10	RCF	0.535	0.827	0.653	0.745	0.599	0.800
	11	WT	0.095	0.806	0.116	0.715	0.108	0.721
	12	airPLS	0.622	0.773	0.820	0.615	1.078	0.421
Chl-b	13	Origin	0.240	0.854	0.300	0.774	0.342	0.718
	14	MSC	0.284	0.784	0.339	0.695	0.366	0.677
	15	SNV	0.282	0.789	0.343	0.690	0.353	0.701
	16	RCF	0.295	0.810	0.347	0.717	0.330	0.734
	17	WT	0.299	0.772	0.349	0.690	0.354	0.698
	18	airPLS	0.247	0.844	0.340	0.707	0.385	0.644