Table 4.

Leaf photosynthetic rate (P _n), fluoresence parameter (F _v/F _m), SPAD value, specific leaf area (SLA) and leaf area index (LAI) at mid-tillering and heading stages

		Pn (µmol CO2/(m2·s))		Fv/Fm		SPAD		SLA (dm2/g)		LAI
		MT	HS	MT	HS	MT	HS	MT	HS	MT	HS
Variety	9746	24.63a	18.65a	0.77a	0.80a	43.93a	43.73a	2.34a	1.99a	2.85a	6.51a
	Jinfeng	22.87a	17.11b	0.69b	0.79a	44.33a	44.29a	2.25a	2.17a	2.56a	5.45b
Location	Jinshan	24.54a	19.12a	0.76a	0.79a	43.20b	44.17a	2.19a	2.09a	2.43b	6.04a
	Qingpu	22.96a	16.64b	0.70b	0.80a	45.05a	43.85a	2.39a	2.07a	2.98a	5.91a
Year	2005	25.57a	19.21a	0.75a	0.79a	44.85a	47.52a	2.29a	2.18a	2.15b	5.74a
	2006	21.93b	16.56b	0.71b	0.79a	43.40b	40.50b	2.28a	1.98a	3.25a	6.22a
Interaction	Var.×loc.	NS	NS	S	NS	NS	S	NS	NS	NS	NS
	Var.×year	S	NS	S	S	S	NS	NS	S	S	S

Means followed by different letters in the same column are significantly different at the P<0.05 level according to Turkey test. MT: Mid-tillering stage; HS: Heading stage; Var.: Variety; Loc.: Location; NS: Nonsignificant; S: Significant