Development of a semi-open chamber system for the gas exchange measurement of whole-canopy under steady and unsteady states in cucumber seedlings

Table 2 Parameters and RMSE of the FvCB model for the A-Ci response at 10 days after the emergence of cucumber seedlings were measured using steady and unsteady state methods in a portable photosynthesis system, chambers A and B

Measurement type		Vc_max^x		J_max		RMSE^y
Portable photosynthesis system		33.9	b^z	99.6	d	0.3	e
Chamber A	Standard	30.6	cd	83.5	g	1.1	de
	0 to 1000	27.6	e	97.2	de	2.7	bc
	0 to 800	32.7	bc	114.9	c	6.9	a
	0 to 500	41.9	a	122.5	b	7	a
	800 to 400	33.9	b	89	f	1.9	cd
Chamber B	Standard	31.7	bcd	82.5	g	1.6	cde
	0 to 1000	23.6	f	74.5	h	3.9	b
	0 to 800	29.8	de	100.3	d	4.2	b
	0 to 500	42.5	a	134.1	a	7.4	a
	800 to 400	33.9	b	94.6	e	2.7	bc

^z Identical lowercase letters indicate that means are not significantly different according to Tuckey’s HSD test (p > 0.05). Different lower case letters indicate that means are significantly different according to Tuckey's HSD test (p > 0.05)
^y RMSE for each model was calculated through the values measured by the standard A-Ci response and the values estimated by the FvCB model
^x Vc_max maximum rate of Rubisco activity-limited carboxylation, J_max the maximum value of the rate of electron transport under saturated light

ISSN: 1746-4811