TABLE 4.

The selected 2D light response model and 2D time-based (logistic) growth model of choy sum seedling.

Model	Condition	Coefficient		aSD	Model formula	bAdj. R2	cRMSE
2D light response model	Day 14	Pmax	124.7	7.2	${}^{\text{d}}{P}_n(Day\mathrm{\hspace{0.33em}14})=\frac{124.7}{1+e^{-0.007(I-101.3)}}$	0.963	0.4
		Im/2	101.3	14.2
		k1	0.007	0.002
	Day 16	Pmax	155.9	19.4	$P_n(Day\mathrm{\hspace{0.33em}16})=\frac{155.9}{1+e^{-0.005(I-329.2)}}$	0.992	0.3
		Im/2	329.2	55.4
		k1	0.005	0.001
2D time-based growth model	50 μmol/(m2⋅s)	eDWmax	18.1	3.7	$D{W}_{I-50}=\frac{18.1}{1+e^{-0.35(t-10.2)}}$	0.975	6.0
		tm/2	10.2	1.4
		k2	0.35	0.04
	100 μmol/(m2⋅s)	DWmax	90.3	25.2	$D{W}_{I-100}=\frac{90.3}{1+e^{-0.34(t-15.1)}}$	0.988	1.8
		tm/2	15.1	1.7
		k2	0.34	0.03
	150 μmol/(m2⋅s)	DWmax	109.4	20.5	$D{W}_{I-150}=\frac{109.4}{1+e^{-0.39(t-13.7)}}$	0.990	1.9
		tm/2	13.7	0.9
		k2	0.39	0.02
	200 μmol/(m2⋅s)	DWmax	182.4	37.5	$D{W}_{I-200}=\frac{182.4}{1+e^{-0.42(t-14.1)}}$	0.987	6.2
		tm/2	14.1	0.9
		k2	0.42	0.02
	250 μmol/(m2⋅s)	DWmax	232.9	67.7	$D{W}_{I-250}=\frac{232.9}{1+e^{-0.44(t-13.7)}}$	0.965	13.9
		tm/2	13.7	1.2
		k2	0.44	0.03
	300 μmol/(m2⋅s)	DWmax	258.7	36.5	$D{W}_{I-300}=\frac{258.7}{1+e^{-0.5(t-12.3)}}$	0.986	16.1
		tm/2	12.3	0.6
		k2	0.50	0.03
	350 μmol/(m2⋅s)	DWmax	280.5	63.5	$D{W}_{I-350}=\frac{280.5}{1+e^{-0.5(t-12.5)}}$	0.952	21.1
		tm/2	12.5	1.0
		k2	0.50	0.04
	400 μmol/(m2⋅s)	DWmax	419.5	48.9	$D{W}_{I-400}=\frac{419.5}{1+e^{-0.49(t-13.5)}}$	0.989	12.3
		tm/2	13.5	0.6
		k2	0.49	0.02
	450 μmol/(m2⋅s)	DWmax	355.8	38.3	$D{W}_{I-450}=\frac{355.8}{1+e^{-0.51(t-12.9)}}$	0.988	13.8
		tm/2	12.9	0.6
		k2	0.51	0.02
	500 μmol/(m2⋅s)	DWmax	262.0	37.3	$D{W}_{I-500}=\frac{262.0}{1+e^{-0.56(t-11.0)}}$	0.968	22.0
		tm/2	11.0	0.6
		k2	0.56	0.03

^aSD, standard deviation.

^bAdj., adjusted.

^cRMSE, root mean square error.

^dP_n, net photosynthetic rate.

^eDW, dry weight. RMSE unit for 2D light response model is “μg/(m²⋅s)”. RMSE unit for 2D time-based growth model is “mg/seedling.”